vpx/vp9/encoder/vp9_corner_detect.c
Debargha Mukherjee caae13d54f Global motion continued
Implements a first version of global motion where the
existing ZEROMV mode is converted to a translation only
global motion mode.
A lot of the code for supporting a rotation-zoom affine
model is also incorporated.
WIP.

Change-Id: Ia1288a8dfe82f89484d4e291780288388e56d91b
2015-05-06 14:59:38 -07:00

3022 lines
112 KiB
C

/*
* Copyright (c) 2015 The WebM project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be
* found in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
////////////////////////////////////////////////////////////////////
/*
* The code for FAST in this file is taken from
* http://www.edwardrosten.com/work/fast.html with the following
* copyright notice:
*
* Copyright (c) 2006, 2008, 2009, 2010 Edward Rosten
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* *Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* *Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* *Neither the name of the University of Cambridge nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
*/
#include <stdlib.h>
#include <stdio.h>
#include <memory.h>
#include <math.h>
#include <assert.h>
#include "vp9_corner_detect.h"
typedef struct {
int x, y;
} xy;
typedef unsigned char byte;
xy* fast_nonmax(const byte* im, int xsize, int ysize, int stride,
xy* corners, int numcorners, int barrier, int* numnx);
xy* fast_corner_detect_9(const byte* im, int xsize, int ysize, int stride,
int barrier, int* numcorners);
xy* fast_corner_detect_9(const byte* im, int xsize, int ysize, int stride,
int barrier, int* num) {
int boundary = 3, y, cb, c_b;
const byte *line_max, *line_min;
int rsize=512, total=0;
xy *ret = (xy*)malloc(rsize*sizeof(xy));
const byte* cache_0;
const byte* cache_1;
const byte* cache_2;
int pixel[16];
pixel[0] = 0 + 3 * stride;
pixel[1] = 1 + 3 * stride;
pixel[2] = 2 + 2 * stride;
pixel[3] = 3 + 1 * stride;
pixel[4] = 3 + 0 * stride;
pixel[5] = 3 + -1 * stride;
pixel[6] = 2 + -2 * stride;
pixel[7] = 1 + -3 * stride;
pixel[8] = 0 + -3 * stride;
pixel[9] = -1 + -3 * stride;
pixel[10] = -2 + -2 * stride;
pixel[11] = -3 + -1 * stride;
pixel[12] = -3 + 0 * stride;
pixel[13] = -3 + 1 * stride;
pixel[14] = -2 + 2 * stride;
pixel[15] = -1 + 3 * stride;
for(y = boundary ; y < ysize - boundary; y++)
{
cache_0 = im + boundary + y*stride;
line_min = cache_0 - boundary;
line_max = im + xsize - boundary + y * stride;
cache_1 = cache_0 + pixel[5];
cache_2 = cache_0 + pixel[14];
for(; cache_0 < line_max;cache_0++, cache_1++, cache_2++)
{
cb = *cache_0 + barrier;
c_b = *cache_0 - barrier;
if(*cache_1 > cb)
if(*cache_2 > cb)
if(*(cache_0+3) > cb)
if(*(cache_0 + pixel[0]) > cb)
if(*(cache_0 + pixel[3]) > cb)
if(*(cache_0 + pixel[6]) > cb)
if(*(cache_2+4) > cb)
if(*(cache_0 + pixel[15]) > cb)
if(*(cache_0 + pixel[1]) > cb)
goto success;
else if(*(cache_0 + pixel[1]) < c_b)
continue;
else
if(*(cache_0 + pixel[10]) > cb)
if(*(cache_0 + pixel[8]) > cb)
if(*(cache_0 + pixel[7]) > cb)
if(*(cache_0 + pixel[9]) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else if(*(cache_0 + pixel[15]) < c_b)
continue;
else
if(*(cache_0 + pixel[8]) > cb)
if(*(cache_0 + pixel[7]) > cb)
if(*(cache_0 + pixel[1]) > cb)
goto success;
else if(*(cache_0 + pixel[1]) < c_b)
continue;
else
if(*(cache_0 + pixel[10]) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else if(*(cache_2+4) < c_b)
continue;
else
if(*(cache_1+-6) > cb)
if(*(cache_0 + pixel[9]) > cb)
if(*(cache_0 + pixel[10]) > cb)
if(*(cache_0 + pixel[8]) > cb)
if(*(cache_0 + pixel[7]) > cb)
goto success;
else if(*(cache_0 + pixel[7]) < c_b)
continue;
else
if(*(cache_0+-3) > cb)
goto success;
else
continue;
else if(*(cache_0 + pixel[8]) < c_b)
continue;
else
if(*(cache_0+-3) > cb)
if(*(cache_0 + pixel[1]) > cb)
if(*(cache_0 + pixel[13]) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(*(cache_0 + pixel[6]) < c_b)
if(*(cache_0 + pixel[13]) > cb)
if(*(cache_0 + pixel[1]) > cb)
if(*(cache_1+-6) > cb)
continue;
else if(*(cache_1+-6) < c_b)
if(*(cache_0 + pixel[15]) > cb)
goto success;
else
continue;
else
goto success;
else
continue;
else
continue;
else
if(*(cache_0 + pixel[13]) > cb)
if(*(cache_0 + pixel[15]) > cb)
if(*(cache_2+4) > cb)
if(*(cache_0 + pixel[1]) > cb)
goto success;
else if(*(cache_0 + pixel[1]) < c_b)
continue;
else
if(*(cache_0 + pixel[8]) > cb)
if(*(cache_1+-6) > cb)
goto success;
else
continue;
else
continue;
else if(*(cache_2+4) < c_b)
continue;
else
if(*(cache_0 + pixel[9]) > cb)
if(*(cache_0+-3) > cb)
if(*(cache_0 + pixel[1]) > cb)
if(*(cache_0 + pixel[10]) > cb)
if(*(cache_1+-6) > cb)
goto success;
else
continue;
else
continue;
else if(*(cache_0 + pixel[1]) < c_b)
continue;
else
if(*(cache_0 + pixel[8]) > cb)
if(*(cache_0 + pixel[10]) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(*(cache_0 + pixel[3]) < c_b)
continue;
else
if(*(cache_0+-3) > cb)
if(*(cache_0 + pixel[10]) > cb)
if(*(cache_1+-6) > cb)
if(*(cache_0 + pixel[8]) > cb)
if(*(cache_0 + pixel[9]) > cb)
goto success;
else if(*(cache_0 + pixel[9]) < c_b)
continue;
else
if(*(cache_2+4) > cb)
goto success;
else
continue;
else if(*(cache_0 + pixel[8]) < c_b)
if(*(cache_0 + pixel[7]) > cb || *(cache_0 + pixel[7]) < c_b)
continue;
else
goto success;
else
if(*(cache_2+4) > cb)
if(*(cache_0 + pixel[13]) > cb)
if(*(cache_0 + pixel[15]) > cb)
goto success;
else
continue;
else
continue;
else if(*(cache_2+4) < c_b)
continue;
else
if(*(cache_0 + pixel[9]) > cb)
if(*(cache_0 + pixel[1]) > cb)
if(*(cache_0 + pixel[13]) > cb)
if(*(cache_0 + pixel[15]) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(*(cache_0 + pixel[0]) < c_b)
if(*(cache_0 + pixel[7]) > cb)
if(*(cache_0 + pixel[10]) > cb)
goto success;
else
continue;
else
continue;
else
if(*(cache_0 + pixel[7]) > cb)
if(*(cache_0 + pixel[10]) > cb)
if(*(cache_0 + pixel[3]) > cb)
if(*(cache_0 + pixel[6]) > cb)
if(*(cache_0 + pixel[8]) > cb)
if(*(cache_2+4) > cb)
if(*(cache_0 + pixel[9]) > cb)
goto success;
else
continue;
else if(*(cache_2+4) < c_b)
continue;
else
if(*(cache_1+-6) > cb)
if(*(cache_0 + pixel[9]) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else if(*(cache_0 + pixel[6]) < c_b)
continue;
else
if(*(cache_0 + pixel[15]) > cb)
if(*(cache_0+-3) > cb)
if(*(cache_0 + pixel[9]) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else if(*(cache_0 + pixel[3]) < c_b)
continue;
else
if(*(cache_0+-3) > cb)
if(*(cache_0 + pixel[8]) > cb)
if(*(cache_1+-6) > cb)
if(*(cache_0 + pixel[6]) > cb)
if(*(cache_0 + pixel[9]) > cb)
goto success;
else
continue;
else if(*(cache_0 + pixel[6]) < c_b)
continue;
else
if(*(cache_0 + pixel[15]) > cb)
if(*(cache_0 + pixel[13]) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(*(cache_0 + pixel[10]) < c_b)
continue;
else
if(*(cache_0 + pixel[1]) > cb)
if(*(cache_0 + pixel[9]) > cb)
if(*(cache_0 + pixel[6]) > cb)
if(*(cache_2+4) > cb)
if(*(cache_0 + pixel[3]) > cb)
if(*(cache_0 + pixel[8]) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(*(cache_0+3) < c_b)
if(*(cache_0+-3) > cb)
if(*(cache_0 + pixel[9]) > cb)
if(*(cache_1+-6) > cb)
if(*(cache_0 + pixel[10]) > cb)
if(*(cache_0 + pixel[6]) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(*(cache_0+-3) > cb)
if(*(cache_1+-6) > cb)
if(*(cache_0 + pixel[7]) > cb)
if(*(cache_0 + pixel[13]) > cb)
if(*(cache_0 + pixel[10]) > cb)
if(*(cache_0 + pixel[9]) > cb)
if(*(cache_0 + pixel[6]) > cb)
if(*(cache_0 + pixel[8]) > cb)
goto success;
else if(*(cache_0 + pixel[8]) < c_b)
continue;
else
if(*(cache_0 + pixel[0]) > cb)
if(*(cache_0 + pixel[1]) > cb)
goto success;
else
continue;
else
continue;
else if(*(cache_0 + pixel[6]) < c_b)
continue;
else
if(*(cache_0 + pixel[15]) > cb)
if(*(cache_0 + pixel[8]) > cb)
goto success;
else if(*(cache_0 + pixel[8]) < c_b)
continue;
else
if(*(cache_0 + pixel[0]) > cb)
goto success;
else
continue;
else
continue;
else if(*(cache_0 + pixel[9]) < c_b)
continue;
else
if(*(cache_2+4) > cb)
if(*(cache_0 + pixel[0]) > cb)
if(*(cache_0 + pixel[1]) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else if(*(cache_0 + pixel[10]) < c_b)
continue;
else
if(*(cache_0 + pixel[3]) > cb)
if(*(cache_0 + pixel[1]) > cb)
if(*(cache_0 + pixel[15]) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else if(*(cache_0 + pixel[7]) < c_b)
if(*(cache_0 + pixel[10]) > cb)
if(*(cache_2+4) > cb)
if(*(cache_0 + pixel[13]) > cb)
if(*(cache_0 + pixel[0]) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(*(cache_0 + pixel[0]) > cb)
if(*(cache_0 + pixel[10]) > cb)
if(*(cache_0 + pixel[13]) > cb)
if(*(cache_2+4) > cb)
if(*(cache_0 + pixel[15]) > cb)
if(*(cache_0 + pixel[1]) > cb)
goto success;
else
continue;
else
continue;
else if(*(cache_2+4) < c_b)
continue;
else
if(*(cache_0 + pixel[9]) > cb)
if(*(cache_0 + pixel[1]) > cb)
if(*(cache_0 + pixel[15]) > cb)
goto success;
else
continue;
else if(*(cache_0 + pixel[1]) < c_b)
continue;
else
if(*(cache_0 + pixel[8]) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else if(*(cache_0 + pixel[10]) < c_b)
continue;
else
if(*(cache_0 + pixel[3]) > cb)
if(*(cache_2+4) > cb)
if(*(cache_0 + pixel[15]) > cb)
if(*(cache_0 + pixel[13]) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(*cache_2 < c_b)
if(*(cache_0+3) > cb)
if(*(cache_0 + pixel[7]) > cb)
if(*(cache_0 + pixel[1]) > cb)
if(*(cache_0 + pixel[9]) > cb)
if(*(cache_2+4) > cb)
if(*(cache_0 + pixel[6]) > cb)
if(*(cache_0 + pixel[3]) > cb)
if(*(cache_0 + pixel[8]) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else if(*(cache_2+4) < c_b)
continue;
else
if(*(cache_1+-6) > cb)
if(*(cache_0 + pixel[3]) > cb)
goto success;
else
continue;
else
continue;
else if(*(cache_0 + pixel[9]) < c_b)
if(*(cache_0 + pixel[15]) > cb)
if(*(cache_2+4) > cb)
if(*(cache_0 + pixel[3]) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else
if(*(cache_0 + pixel[0]) > cb)
if(*(cache_0 + pixel[8]) > cb)
if(*(cache_2+4) > cb)
if(*(cache_0 + pixel[3]) > cb)
if(*(cache_0 + pixel[6]) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else if(*(cache_0 + pixel[8]) < c_b)
continue;
else
if(*(cache_0 + pixel[15]) > cb)
if(*(cache_2+4) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else if(*(cache_0 + pixel[1]) < c_b)
if(*(cache_1+-6) > cb)
if(*(cache_0 + pixel[3]) > cb)
if(*(cache_0 + pixel[10]) > cb)
if(*(cache_0 + pixel[6]) > cb)
if(*(cache_0 + pixel[8]) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else if(*(cache_0 + pixel[3]) < c_b)
continue;
else
if(*(cache_0+-3) > cb)
if(*(cache_0 + pixel[10]) > cb)
if(*(cache_0 + pixel[6]) > cb)
if(*(cache_0 + pixel[8]) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else if(*(cache_1+-6) < c_b)
if(*(cache_0 + pixel[9]) > cb)
if(*(cache_0 + pixel[3]) > cb)
if(*(cache_2+4) > cb)
if(*(cache_0 + pixel[10]) > cb)
goto success;
else
continue;
else if(*(cache_2+4) < c_b)
if(*(cache_0 + pixel[10]) < c_b)
goto success;
else
continue;
else
continue;
else if(*(cache_0 + pixel[3]) < c_b)
if(*(cache_0 + pixel[15]) < c_b)
if(*(cache_0+-3) < c_b)
goto success;
else
continue;
else
continue;
else
if(*(cache_0 + pixel[10]) < c_b)
if(*(cache_2+4) < c_b)
goto success;
else
continue;
else
continue;
else if(*(cache_0 + pixel[9]) < c_b)
if(*(cache_0 + pixel[0]) < c_b)
goto success;
else
continue;
else
if(*(cache_2+4) < c_b)
if(*(cache_0 + pixel[10]) > cb)
continue;
else if(*(cache_0 + pixel[10]) < c_b)
if(*(cache_0 + pixel[15]) < c_b)
goto success;
else
continue;
else
if(*(cache_0 + pixel[3]) < c_b)
if(*(cache_0 + pixel[15]) < c_b)
if(*(cache_0 + pixel[0]) < c_b)
if(*(cache_0+-3) < c_b)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(*(cache_2+4) > cb)
if(*(cache_0 + pixel[8]) > cb)
goto success;
else
continue;
else
continue;
else
if(*(cache_0 + pixel[10]) > cb)
if(*(cache_0 + pixel[3]) > cb)
if(*(cache_2+4) > cb)
if(*(cache_0 + pixel[6]) > cb)
if(*(cache_0 + pixel[9]) > cb)
goto success;
else
continue;
else
continue;
else if(*(cache_2+4) < c_b)
continue;
else
if(*(cache_1+-6) > cb)
if(*(cache_0 + pixel[6]) > cb)
if(*(cache_0 + pixel[9]) > cb)
if(*(cache_0 + pixel[8]) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else if(*(cache_0 + pixel[3]) < c_b)
continue;
else
if(*(cache_0+-3) > cb)
if(*(cache_1+-6) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else if(*(cache_0 + pixel[7]) < c_b)
if(*(cache_1+-6) < c_b)
if(*(cache_0 + pixel[15]) > cb)
continue;
else if(*(cache_0 + pixel[15]) < c_b)
if(*(cache_0+-3) < c_b)
if(*(cache_0 + pixel[10]) > cb)
continue;
else if(*(cache_0 + pixel[10]) < c_b)
if(*(cache_0 + pixel[13]) < c_b)
if(*(cache_0 + pixel[9]) > cb)
continue;
else if(*(cache_0 + pixel[9]) < c_b)
if(*(cache_0 + pixel[8]) > cb)
continue;
else if(*(cache_0 + pixel[8]) < c_b)
goto success;
else
if(*(cache_0 + pixel[1]) < c_b)
goto success;
else
continue;
else
if(*(cache_2+4) < c_b)
goto success;
else
continue;
else
continue;
else
if(*(cache_0 + pixel[3]) < c_b)
goto success;
else
continue;
else
continue;
else
if(*(cache_0 + pixel[6]) < c_b)
if(*(cache_0 + pixel[10]) < c_b)
if(*(cache_0+-3) < c_b)
if(*(cache_0 + pixel[8]) < c_b)
if(*(cache_0 + pixel[13]) < c_b)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(*(cache_0 + pixel[0]) < c_b)
if(*(cache_0 + pixel[10]) > cb)
continue;
else if(*(cache_0 + pixel[10]) < c_b)
if(*(cache_0 + pixel[9]) > cb)
continue;
else if(*(cache_0 + pixel[9]) < c_b)
if(*(cache_0+-3) < c_b)
if(*(cache_0 + pixel[1]) > cb)
continue;
else if(*(cache_0 + pixel[1]) < c_b)
if(*(cache_1+-6) < c_b)
if(*(cache_0 + pixel[13]) < c_b)
if(*(cache_0 + pixel[15]) < c_b)
goto success;
else
continue;
else
continue;
else
continue;
else
if(*(cache_0 + pixel[8]) < c_b)
if(*(cache_0 + pixel[13]) < c_b)
if(*(cache_1+-6) < c_b)
if(*(cache_0 + pixel[15]) < c_b)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(*(cache_2+4) < c_b)
if(*(cache_0+-3) < c_b)
if(*(cache_0 + pixel[1]) < c_b)
if(*(cache_1+-6) < c_b)
if(*(cache_0 + pixel[13]) < c_b)
if(*(cache_0 + pixel[15]) < c_b)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(*(cache_0 + pixel[3]) < c_b)
if(*(cache_1+-6) < c_b)
if(*(cache_0+-3) < c_b)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else if(*(cache_0+3) < c_b)
if(*(cache_0+-3) > cb)
if(*(cache_0 + pixel[13]) > cb)
goto success;
else
continue;
else if(*(cache_0+-3) < c_b)
if(*(cache_0 + pixel[9]) > cb)
if(*(cache_0 + pixel[13]) < c_b)
goto success;
else
continue;
else if(*(cache_0 + pixel[9]) < c_b)
goto success;
else
if(*(cache_0 + pixel[6]) > cb || *(cache_0 + pixel[6]) < c_b)
continue;
else
if(*(cache_2+4) < c_b)
goto success;
else
continue;
else
continue;
else
if(*(cache_1+-6) > cb)
if(*(cache_0 + pixel[13]) > cb)
if(*(cache_0 + pixel[9]) > cb)
if(*(cache_0 + pixel[7]) > cb)
if(*(cache_0+-3) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else if(*(cache_1+-6) < c_b)
if(*(cache_0 + pixel[3]) > cb)
if(*(cache_0 + pixel[8]) < c_b)
if(*(cache_0 + pixel[15]) > cb)
continue;
else if(*(cache_0 + pixel[15]) < c_b)
if(*(cache_0 + pixel[13]) < c_b)
if(*(cache_0 + pixel[0]) > cb)
continue;
else if(*(cache_0 + pixel[0]) < c_b)
goto success;
else
if(*(cache_0 + pixel[7]) < c_b)
goto success;
else
continue;
else
continue;
else
if(*(cache_0 + pixel[6]) < c_b)
goto success;
else
continue;
else
continue;
else if(*(cache_0 + pixel[3]) < c_b)
if(*(cache_2+4) > cb)
continue;
else if(*(cache_2+4) < c_b)
if(*(cache_0 + pixel[0]) < c_b)
if(*(cache_0 + pixel[1]) > cb)
continue;
else if(*(cache_0 + pixel[1]) < c_b)
if(*(cache_0 + pixel[15]) < c_b)
if(*(cache_0+-3) < c_b)
if(*(cache_0 + pixel[13]) < c_b)
goto success;
else
continue;
else
continue;
else
continue;
else
if(*(cache_0 + pixel[8]) < c_b)
goto success;
else
continue;
else
continue;
else
if(*(cache_0 + pixel[9]) < c_b)
if(*(cache_0 + pixel[1]) > cb)
continue;
else if(*(cache_0 + pixel[1]) < c_b)
if(*(cache_0+-3) < c_b)
goto success;
else
continue;
else
if(*(cache_0 + pixel[8]) < c_b)
if(*(cache_0 + pixel[0]) < c_b)
goto success;
else
continue;
else
continue;
else
continue;
else
if(*(cache_0 + pixel[1]) > cb)
continue;
else if(*(cache_0 + pixel[1]) < c_b)
if(*(cache_0 + pixel[10]) < c_b)
if(*(cache_0+-3) < c_b)
if(*(cache_0 + pixel[9]) > cb)
if(*(cache_2+4) < c_b)
goto success;
else
continue;
else if(*(cache_0 + pixel[9]) < c_b)
if(*(cache_0 + pixel[15]) > cb)
continue;
else if(*(cache_0 + pixel[15]) < c_b)
if(*(cache_0 + pixel[13]) < c_b)
goto success;
else
continue;
else
if(*(cache_0 + pixel[6]) < c_b)
goto success;
else
continue;
else
if(*(cache_2+4) < c_b)
if(*(cache_0 + pixel[15]) < c_b)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(*(cache_0 + pixel[7]) > cb)
continue;
else if(*(cache_0 + pixel[7]) < c_b)
if(*(cache_0 + pixel[15]) > cb)
continue;
else if(*(cache_0 + pixel[15]) < c_b)
if(*(cache_0 + pixel[10]) < c_b)
if(*(cache_0+-3) < c_b)
if(*(cache_0 + pixel[8]) < c_b)
if(*(cache_0 + pixel[13]) < c_b)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(*(cache_0 + pixel[6]) < c_b)
goto success;
else
continue;
else
if(*(cache_0 + pixel[0]) < c_b)
if(*(cache_0 + pixel[8]) < c_b)
goto success;
else
continue;
else
continue;
else
continue;
else
if(*(cache_0 + pixel[7]) > cb)
if(*(cache_0 + pixel[3]) > cb)
if(*(cache_0 + pixel[10]) > cb)
if(*(cache_0+3) > cb)
if(*(cache_2+4) > cb)
if(*(cache_0 + pixel[6]) > cb)
if(*(cache_0 + pixel[8]) > cb)
if(*(cache_0 + pixel[9]) > cb)
goto success;
else if(*(cache_0 + pixel[9]) < c_b)
continue;
else
if(*(cache_0 + pixel[0]) > cb)
goto success;
else
continue;
else if(*(cache_0 + pixel[8]) < c_b)
continue;
else
if(*(cache_0 + pixel[15]) > cb)
if(*(cache_0 + pixel[0]) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else if(*(cache_2+4) < c_b)
if(*(cache_1+-6) > cb)
goto success;
else
continue;
else
if(*(cache_1+-6) > cb)
if(*(cache_0 + pixel[6]) > cb)
if(*(cache_0 + pixel[8]) > cb)
if(*(cache_0 + pixel[9]) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else if(*(cache_0+3) < c_b)
continue;
else
if(*(cache_0+-3) > cb)
if(*(cache_0 + pixel[13]) > cb)
if(*(cache_1+-6) > cb)
if(*(cache_0 + pixel[6]) > cb)
if(*(cache_0 + pixel[8]) > cb)
if(*(cache_0 + pixel[9]) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(*(cache_0 + pixel[10]) < c_b)
if(*(cache_0 + pixel[15]) > cb)
if(*(cache_2+4) > cb)
if(*(cache_0 + pixel[6]) > cb)
if(*(cache_0+3) > cb)
if(*(cache_0 + pixel[0]) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else if(*(cache_0 + pixel[15]) < c_b)
continue;
else
if(*(cache_0 + pixel[8]) > cb)
if(*(cache_0 + pixel[0]) > cb)
goto success;
else if(*(cache_0 + pixel[0]) < c_b)
continue;
else
if(*(cache_0 + pixel[9]) > cb)
if(*(cache_0 + pixel[1]) > cb)
if(*(cache_0 + pixel[6]) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(*(cache_0 + pixel[1]) > cb)
if(*(cache_0 + pixel[9]) > cb)
if(*(cache_0 + pixel[6]) > cb)
if(*(cache_0+3) > cb)
if(*(cache_2+4) > cb)
if(*(cache_0 + pixel[8]) > cb)
goto success;
else if(*(cache_0 + pixel[8]) < c_b)
continue;
else
if(*(cache_0 + pixel[15]) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else if(*(cache_0 + pixel[9]) < c_b)
if(*(cache_0 + pixel[0]) > cb)
goto success;
else
continue;
else
if(*(cache_0 + pixel[0]) > cb)
if(*(cache_0+3) > cb)
if(*(cache_0 + pixel[6]) > cb)
if(*(cache_0 + pixel[15]) > cb)
if(*(cache_2+4) > cb)
goto success;
else
continue;
else if(*(cache_0 + pixel[15]) < c_b)
continue;
else
if(*(cache_0 + pixel[8]) > cb)
if(*(cache_2+4) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(*(cache_0 + pixel[3]) < c_b)
if(*(cache_0 + pixel[13]) > cb)
if(*(cache_1+-6) > cb)
if(*(cache_0 + pixel[9]) > cb)
if(*(cache_0+-3) > cb)
if(*(cache_0 + pixel[6]) > cb)
if(*(cache_0 + pixel[8]) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(*(cache_0 + pixel[13]) < c_b)
continue;
else
if(*(cache_0+3) > cb)
if(*(cache_0+-3) > cb)
if(*(cache_0 + pixel[10]) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else
if(*(cache_0+-3) > cb)
if(*(cache_0 + pixel[13]) > cb)
if(*(cache_1+-6) > cb)
if(*(cache_0 + pixel[9]) > cb)
if(*(cache_0 + pixel[6]) > cb)
if(*(cache_0 + pixel[10]) > cb)
if(*(cache_0 + pixel[8]) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(*(cache_0 + pixel[13]) < c_b)
if(*(cache_0 + pixel[0]) > cb)
goto success;
else
continue;
else
if(*(cache_0+3) > cb)
if(*(cache_0 + pixel[9]) > cb)
if(*(cache_1+-6) > cb)
if(*(cache_0 + pixel[6]) > cb)
if(*(cache_0 + pixel[10]) > cb)
if(*(cache_0 + pixel[8]) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(*cache_1 < c_b)
if(*(cache_0 + pixel[15]) > cb)
if(*(cache_1+-6) > cb)
if(*(cache_2+4) > cb)
if(*(cache_0+-3) > cb)
if(*(cache_0 + pixel[10]) > cb)
if(*(cache_0 + pixel[13]) > cb)
if(*(cache_0 + pixel[1]) > cb)
if(*cache_2 > cb)
goto success;
else
continue;
else if(*(cache_0 + pixel[1]) < c_b)
continue;
else
if(*(cache_0 + pixel[7]) > cb)
goto success;
else
continue;
else
continue;
else if(*(cache_0 + pixel[10]) < c_b)
if(*(cache_0 + pixel[3]) > cb)
if(*(cache_0 + pixel[13]) > cb)
if(*cache_2 > cb)
goto success;
else
continue;
else
continue;
else
continue;
else
if(*(cache_0 + pixel[3]) > cb)
if(*(cache_0 + pixel[1]) > cb)
if(*cache_2 > cb)
if(*(cache_0 + pixel[0]) > cb)
if(*(cache_0 + pixel[13]) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(*(cache_2+4) < c_b)
if(*(cache_0 + pixel[7]) > cb)
if(*(cache_0+-3) > cb)
if(*cache_2 > cb)
if(*(cache_0 + pixel[13]) > cb)
if(*(cache_0 + pixel[9]) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else if(*(cache_0 + pixel[7]) < c_b)
if(*(cache_0 + pixel[9]) > cb)
if(*(cache_0 + pixel[1]) > cb)
if(*(cache_0+-3) > cb)
goto success;
else
continue;
else
continue;
else if(*(cache_0 + pixel[9]) < c_b)
if(*(cache_0 + pixel[10]) > cb)
continue;
else if(*(cache_0 + pixel[10]) < c_b)
if(*(cache_0 + pixel[3]) < c_b)
if(*(cache_0+3) < c_b)
goto success;
else
continue;
else
continue;
else
if(*(cache_0 + pixel[1]) < c_b)
if(*(cache_0 + pixel[3]) < c_b)
goto success;
else
continue;
else
continue;
else
if(*(cache_0 + pixel[0]) < c_b)
goto success;
else
continue;
else
if(*(cache_0 + pixel[0]) > cb)
if(*(cache_0 + pixel[13]) > cb)
if(*(cache_0 + pixel[9]) > cb)
if(*cache_2 > cb)
if(*(cache_0 + pixel[1]) > cb)
if(*(cache_0 + pixel[10]) > cb)
goto success;
else
continue;
else if(*(cache_0 + pixel[1]) < c_b)
continue;
else
if(*(cache_0 + pixel[8]) > cb)
if(*(cache_0+-3) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(*(cache_0 + pixel[9]) > cb)
if(*(cache_0+-3) > cb)
if(*(cache_0 + pixel[1]) > cb)
if(*cache_2 > cb)
if(*(cache_0 + pixel[10]) > cb)
if(*(cache_0 + pixel[13]) > cb)
if(*(cache_0 + pixel[0]) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else if(*(cache_0 + pixel[1]) < c_b)
continue;
else
if(*(cache_0 + pixel[7]) > cb)
if(*(cache_0 + pixel[10]) > cb)
if(*(cache_0 + pixel[13]) > cb)
if(*cache_2 > cb)
goto success;
else
continue;
else
continue;
else
continue;
else if(*(cache_0 + pixel[7]) < c_b)
continue;
else
if(*(cache_0 + pixel[0]) > cb)
if(*(cache_0 + pixel[8]) > cb)
if(*(cache_0 + pixel[6]) < c_b)
if(*(cache_0 + pixel[10]) > cb)
if(*(cache_0 + pixel[13]) > cb)
goto success;
else
continue;
else
continue;
else
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else if(*(cache_1+-6) < c_b)
if(*(cache_0 + pixel[3]) > cb)
if(*(cache_0 + pixel[13]) > cb)
if(*(cache_0+-3) > cb)
if(*(cache_0+3) > cb)
goto success;
else
continue;
else if(*(cache_0+-3) < c_b)
if(*(cache_0+3) < c_b)
if(*(cache_0 + pixel[6]) < c_b)
goto success;
else
continue;
else
continue;
else
continue;
else if(*(cache_0 + pixel[13]) < c_b)
if(*(cache_0 + pixel[7]) < c_b)
if(*(cache_0 + pixel[6]) < c_b)
if(*(cache_0 + pixel[8]) < c_b)
if(*(cache_0+-3) < c_b)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(*(cache_0+3) < c_b)
if(*(cache_0+-3) < c_b)
if(*(cache_0 + pixel[7]) < c_b)
goto success;
else
continue;
else
continue;
else
continue;
else if(*(cache_0 + pixel[3]) < c_b)
if(*(cache_0 + pixel[8]) < c_b)
if(*(cache_0 + pixel[9]) < c_b)
if(*(cache_0 + pixel[7]) < c_b)
if(*(cache_0+3) > cb)
continue;
else if(*(cache_0+3) < c_b)
if(*(cache_0 + pixel[10]) > cb)
continue;
else if(*(cache_0 + pixel[10]) < c_b)
if(*(cache_0 + pixel[6]) < c_b)
goto success;
else
continue;
else
if(*(cache_0 + pixel[1]) < c_b)
goto success;
else
continue;
else
if(*(cache_0 + pixel[13]) < c_b)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(*(cache_0+-3) < c_b)
if(*(cache_0+3) > cb)
continue;
else if(*(cache_0+3) < c_b)
if(*(cache_0 + pixel[6]) < c_b)
if(*(cache_0 + pixel[10]) < c_b)
if(*(cache_0 + pixel[9]) < c_b)
if(*(cache_0 + pixel[7]) < c_b)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(*(cache_0 + pixel[13]) < c_b)
if(*(cache_0 + pixel[7]) < c_b)
if(*(cache_0 + pixel[6]) < c_b)
if(*(cache_0 + pixel[10]) < c_b)
if(*(cache_0 + pixel[8]) < c_b)
if(*(cache_0 + pixel[9]) < c_b)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(*(cache_2+4) > cb)
if(*(cache_0+3) > cb)
if(*(cache_0+-3) > cb)
if(*(cache_0 + pixel[13]) > cb)
if(*(cache_0 + pixel[1]) > cb)
if(*(cache_0 + pixel[3]) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(*(cache_2+4) < c_b)
if(*(cache_0 + pixel[10]) > cb)
continue;
else if(*(cache_0 + pixel[10]) < c_b)
if(*(cache_0+3) < c_b)
if(*(cache_0 + pixel[9]) < c_b)
if(*(cache_0 + pixel[3]) < c_b)
if(*(cache_0 + pixel[7]) < c_b)
if(*(cache_0 + pixel[6]) < c_b)
if(*(cache_0 + pixel[8]) < c_b)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(*(cache_0 + pixel[1]) < c_b)
if(*(cache_0 + pixel[9]) < c_b)
if(*(cache_0 + pixel[3]) < c_b)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else if(*(cache_0 + pixel[15]) < c_b)
if(*(cache_0+3) > cb)
if(*(cache_0+-3) < c_b)
if(*(cache_1+-6) < c_b)
if(*(cache_0 + pixel[13]) < c_b)
if(*(cache_0 + pixel[7]) > cb)
continue;
else if(*(cache_0 + pixel[7]) < c_b)
goto success;
else
if(*(cache_0 + pixel[8]) < c_b)
if(*(cache_0 + pixel[0]) < c_b)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(*(cache_0+3) < c_b)
if(*(cache_0 + pixel[6]) > cb)
if(*(cache_0 + pixel[13]) > cb)
if(*cache_2 > cb)
if(*(cache_0 + pixel[10]) > cb)
goto success;
else
continue;
else
continue;
else if(*(cache_0 + pixel[13]) < c_b)
if(*(cache_0 + pixel[0]) < c_b)
if(*(cache_2+4) < c_b)
if(*cache_2 < c_b)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else if(*(cache_0 + pixel[6]) < c_b)
if(*(cache_0 + pixel[3]) > cb)
if(*(cache_0+-3) < c_b)
if(*(cache_0 + pixel[1]) < c_b)
continue;
else
goto success;
else
continue;
else if(*(cache_0 + pixel[3]) < c_b)
if(*(cache_0 + pixel[7]) > cb)
if(*cache_2 < c_b)
goto success;
else
continue;
else if(*(cache_0 + pixel[7]) < c_b)
if(*(cache_2+4) > cb)
if(*(cache_0 + pixel[10]) < c_b)
goto success;
else
continue;
else if(*(cache_2+4) < c_b)
if(*(cache_0 + pixel[1]) > cb)
continue;
else if(*(cache_0 + pixel[1]) < c_b)
if(*(cache_0 + pixel[0]) > cb)
continue;
else if(*(cache_0 + pixel[0]) < c_b)
goto success;
else
if(*(cache_0 + pixel[9]) < c_b)
if(*(cache_0 + pixel[8]) < c_b)
goto success;
else
continue;
else
continue;
else
if(*(cache_0 + pixel[10]) < c_b)
if(*(cache_0 + pixel[8]) < c_b)
if(*(cache_0 + pixel[9]) < c_b)
goto success;
else
continue;
else
continue;
else
continue;
else
if(*(cache_1+-6) < c_b)
if(*(cache_0 + pixel[10]) < c_b)
if(*(cache_0 + pixel[8]) < c_b)
goto success;
else
continue;
else
continue;
else
continue;
else
if(*cache_2 < c_b)
if(*(cache_2+4) < c_b)
if(*(cache_0 + pixel[0]) < c_b)
if(*(cache_0 + pixel[1]) < c_b)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(*(cache_0+-3) < c_b)
if(*(cache_1+-6) < c_b)
if(*(cache_0 + pixel[10]) < c_b)
if(*(cache_0 + pixel[8]) > cb)
continue;
else if(*(cache_0 + pixel[8]) < c_b)
if(*(cache_0 + pixel[9]) > cb)
continue;
else if(*(cache_0 + pixel[9]) < c_b)
if(*(cache_0 + pixel[7]) > cb)
continue;
else if(*(cache_0 + pixel[7]) < c_b)
goto success;
else
if(*(cache_0 + pixel[13]) < c_b)
goto success;
else
continue;
else
if(*(cache_2+4) < c_b)
goto success;
else
continue;
else
if(*(cache_0 + pixel[13]) < c_b)
if(*(cache_0 + pixel[0]) < c_b)
if(*(cache_0 + pixel[7]) > cb || *(cache_0 + pixel[7]) < c_b)
continue;
else
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(*(cache_0 + pixel[13]) < c_b)
if(*(cache_2+4) > cb)
continue;
else if(*(cache_2+4) < c_b)
if(*cache_2 < c_b)
if(*(cache_0 + pixel[3]) > cb)
continue;
else if(*(cache_0 + pixel[3]) < c_b)
if(*(cache_0 + pixel[0]) > cb)
continue;
else if(*(cache_0 + pixel[0]) < c_b)
if(*(cache_0 + pixel[1]) < c_b)
goto success;
else
continue;
else
if(*(cache_0 + pixel[7]) < c_b)
if(*(cache_1+-6) < c_b)
if(*(cache_0 + pixel[8]) < c_b)
goto success;
else
continue;
else
continue;
else
continue;
else
if(*(cache_0+-3) < c_b)
if(*(cache_0 + pixel[10]) < c_b)
if(*(cache_0 + pixel[1]) > cb)
continue;
else if(*(cache_0 + pixel[1]) < c_b)
goto success;
else
if(*(cache_0 + pixel[7]) < c_b)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(*(cache_0 + pixel[9]) < c_b)
if(*(cache_1+-6) < c_b)
if(*(cache_0 + pixel[0]) > cb)
continue;
else if(*(cache_0 + pixel[0]) < c_b)
if(*cache_2 < c_b)
if(*(cache_0 + pixel[10]) < c_b)
if(*(cache_0+-3) < c_b)
goto success;
else
continue;
else
continue;
else
continue;
else
if(*(cache_0 + pixel[7]) < c_b)
if(*(cache_0 + pixel[8]) < c_b)
if(*(cache_0 + pixel[1]) > cb || *(cache_0 + pixel[1]) < c_b)
continue;
else
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(*(cache_0+-3) < c_b)
if(*(cache_0 + pixel[13]) < c_b)
if(*(cache_1+-6) < c_b)
if(*(cache_0 + pixel[9]) > cb)
if(*(cache_0 + pixel[3]) < c_b)
if(*(cache_2+4) < c_b)
goto success;
else
continue;
else
continue;
else if(*(cache_0 + pixel[9]) < c_b)
if(*(cache_0 + pixel[10]) > cb)
continue;
else if(*(cache_0 + pixel[10]) < c_b)
if(*(cache_0 + pixel[7]) > cb)
continue;
else if(*(cache_0 + pixel[7]) < c_b)
if(*cache_2 > cb || *cache_2 < c_b)
goto success;
else
if(*(cache_0 + pixel[6]) < c_b)
if(*(cache_0 + pixel[8]) < c_b)
goto success;
else
continue;
else
continue;
else
if(*(cache_0 + pixel[1]) > cb)
continue;
else if(*(cache_0 + pixel[1]) < c_b)
if(*cache_2 < c_b)
if(*(cache_0 + pixel[0]) < c_b)
goto success;
else
continue;
else
continue;
else
if(*(cache_0 + pixel[0]) < c_b)
if(*(cache_0 + pixel[8]) < c_b)
if(*cache_2 < c_b)
goto success;
else
continue;
else
continue;
else
continue;
else
if(*(cache_0 + pixel[3]) < c_b)
goto success;
else
continue;
else
if(*(cache_2+4) < c_b)
if(*(cache_0 + pixel[1]) < c_b)
if(*(cache_0 + pixel[10]) > cb)
continue;
else if(*(cache_0 + pixel[10]) < c_b)
if(*cache_2 < c_b)
if(*(cache_0 + pixel[0]) < c_b)
goto success;
else
continue;
else
continue;
else
if(*(cache_0 + pixel[3]) < c_b)
if(*(cache_0 + pixel[0]) < c_b)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(*(cache_0 + pixel[8]) > cb)
if(*(cache_0 + pixel[6]) > cb)
if(*cache_2 > cb)
if(*(cache_1+-6) > cb)
if(*(cache_0 + pixel[10]) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else if(*(cache_0 + pixel[8]) < c_b)
if(*(cache_0 + pixel[3]) > cb)
if(*(cache_0 + pixel[13]) > cb)
continue;
else if(*(cache_0 + pixel[13]) < c_b)
if(*(cache_0+-3) < c_b)
if(*(cache_0 + pixel[7]) < c_b)
if(*(cache_1+-6) < c_b)
if(*(cache_0 + pixel[6]) < c_b)
if(*(cache_0 + pixel[10]) < c_b)
if(*(cache_0 + pixel[9]) < c_b)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(*(cache_0+3) < c_b)
if(*(cache_0+-3) < c_b)
if(*(cache_0 + pixel[10]) < c_b)
goto success;
else
continue;
else
continue;
else
continue;
else if(*(cache_0 + pixel[3]) < c_b)
if(*(cache_2+4) > cb)
if(*(cache_1+-6) < c_b)
if(*(cache_0 + pixel[7]) < c_b)
goto success;
else
continue;
else
continue;
else if(*(cache_2+4) < c_b)
if(*(cache_0 + pixel[6]) < c_b)
if(*(cache_0+3) > cb)
continue;
else if(*(cache_0+3) < c_b)
if(*(cache_0 + pixel[10]) > cb)
if(*(cache_0 + pixel[0]) > cb)
continue;
else if(*(cache_0 + pixel[0]) < c_b)
if(*(cache_0 + pixel[1]) < c_b)
goto success;
else
continue;
else
if(*(cache_0 + pixel[9]) < c_b)
if(*(cache_0 + pixel[1]) < c_b)
if(*(cache_0 + pixel[7]) < c_b)
goto success;
else
continue;
else
continue;
else
continue;
else if(*(cache_0 + pixel[10]) < c_b)
if(*(cache_0 + pixel[7]) < c_b)
if(*(cache_0 + pixel[9]) > cb)
continue;
else if(*(cache_0 + pixel[9]) < c_b)
goto success;
else
if(*(cache_0 + pixel[0]) < c_b)
goto success;
else
continue;
else
continue;
else
if(*(cache_0 + pixel[1]) < c_b)
if(*(cache_0 + pixel[9]) > cb)
continue;
else if(*(cache_0 + pixel[9]) < c_b)
if(*(cache_0 + pixel[7]) < c_b)
goto success;
else
continue;
else
if(*(cache_0 + pixel[0]) < c_b)
if(*(cache_0 + pixel[7]) < c_b)
goto success;
else
continue;
else
continue;
else
continue;
else
if(*(cache_0+-3) < c_b)
if(*(cache_0 + pixel[13]) < c_b)
if(*(cache_1+-6) < c_b)
if(*(cache_0 + pixel[7]) < c_b)
if(*(cache_0 + pixel[10]) < c_b)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(*(cache_1+-6) < c_b)
if(*(cache_0+3) > cb)
continue;
else if(*(cache_0+3) < c_b)
if(*(cache_0 + pixel[6]) < c_b)
if(*(cache_0 + pixel[10]) < c_b)
if(*(cache_0 + pixel[7]) < c_b)
if(*(cache_0 + pixel[9]) < c_b)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(*(cache_0+-3) < c_b)
if(*(cache_0 + pixel[13]) < c_b)
if(*(cache_0 + pixel[6]) < c_b)
if(*(cache_0 + pixel[7]) < c_b)
if(*(cache_0 + pixel[10]) < c_b)
if(*(cache_0 + pixel[9]) < c_b)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(*(cache_0+-3) < c_b)
if(*(cache_0 + pixel[13]) > cb)
if(*(cache_0+3) < c_b)
goto success;
else
continue;
else if(*(cache_0 + pixel[13]) < c_b)
if(*(cache_1+-6) < c_b)
if(*(cache_0 + pixel[7]) < c_b)
if(*(cache_0 + pixel[10]) < c_b)
if(*(cache_0 + pixel[6]) < c_b)
if(*(cache_0 + pixel[9]) < c_b)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(*(cache_0+3) < c_b)
if(*(cache_0 + pixel[10]) < c_b)
if(*(cache_0 + pixel[6]) < c_b)
if(*(cache_1+-6) < c_b)
if(*(cache_0 + pixel[7]) < c_b)
if(*(cache_0 + pixel[9]) < c_b)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(*(cache_0+-3) > cb)
if(*cache_2 > cb)
if(*(cache_0 + pixel[7]) > cb)
if(*(cache_1+-6) > cb)
if(*(cache_0 + pixel[6]) > cb)
if(*(cache_0 + pixel[13]) > cb)
if(*(cache_0 + pixel[10]) > cb)
if(*(cache_0 + pixel[9]) > cb)
if(*(cache_0 + pixel[8]) > cb)
goto success;
else if(*(cache_0 + pixel[8]) < c_b)
continue;
else
if(*(cache_0 + pixel[0]) > cb)
goto success;
else
continue;
else if(*(cache_0 + pixel[9]) < c_b)
continue;
else
if(*(cache_2+4) > cb)
if(*(cache_0 + pixel[0]) > cb)
if(*(cache_0 + pixel[1]) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else if(*(cache_0 + pixel[10]) < c_b)
continue;
else
if(*(cache_0 + pixel[3]) > cb)
if(*(cache_0 + pixel[0]) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else if(*(cache_0 + pixel[6]) < c_b)
continue;
else
if(*(cache_0 + pixel[15]) > cb)
if(*(cache_0 + pixel[10]) > cb)
if(*(cache_0 + pixel[13]) > cb)
if(*(cache_0 + pixel[9]) > cb)
if(*(cache_0 + pixel[8]) > cb)
goto success;
else if(*(cache_0 + pixel[8]) < c_b)
continue;
else
if(*(cache_0 + pixel[1]) > cb)
goto success;
else
continue;
else if(*(cache_0 + pixel[9]) < c_b)
continue;
else
if(*(cache_2+4) > cb)
if(*(cache_0 + pixel[1]) > cb)
if(*(cache_0 + pixel[0]) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else if(*(cache_0 + pixel[10]) < c_b)
continue;
else
if(*(cache_0 + pixel[3]) > cb)
if(*(cache_0 + pixel[1]) > cb)
if(*(cache_2+4) > cb)
if(*(cache_0 + pixel[13]) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(*(cache_1+-6) < c_b)
continue;
else
if(*(cache_0+3) > cb)
if(*(cache_2+4) > cb)
if(*(cache_0 + pixel[1]) > cb)
if(*(cache_0 + pixel[0]) > cb)
if(*(cache_0 + pixel[3]) > cb)
if(*(cache_0 + pixel[13]) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(*(cache_0 + pixel[7]) < c_b)
if(*(cache_2+4) > cb)
if(*(cache_1+-6) > cb)
if(*(cache_0 + pixel[3]) > cb)
if(*(cache_0 + pixel[15]) > cb)
if(*(cache_0 + pixel[13]) > cb)
if(*(cache_0 + pixel[1]) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else if(*(cache_0 + pixel[3]) < c_b)
continue;
else
if(*(cache_0 + pixel[10]) > cb)
if(*(cache_0 + pixel[13]) > cb)
if(*(cache_0 + pixel[0]) > cb)
if(*(cache_0 + pixel[1]) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else if(*(cache_1+-6) < c_b)
if(*(cache_0+3) > cb)
if(*(cache_0 + pixel[1]) > cb)
if(*(cache_0 + pixel[0]) > cb)
if(*(cache_0 + pixel[3]) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(*(cache_0+3) > cb)
if(*(cache_0 + pixel[1]) > cb)
if(*(cache_0 + pixel[13]) > cb)
if(*(cache_0 + pixel[3]) > cb)
if(*(cache_0 + pixel[0]) > cb)
if(*(cache_0 + pixel[15]) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(*(cache_2+4) < c_b)
continue;
else
if(*(cache_0 + pixel[9]) > cb)
if(*(cache_0 + pixel[0]) > cb)
if(*(cache_1+-6) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else
if(*(cache_0 + pixel[0]) > cb)
if(*(cache_0 + pixel[10]) > cb)
if(*(cache_2+4) > cb)
if(*(cache_0 + pixel[13]) > cb)
if(*(cache_1+-6) > cb)
if(*(cache_0 + pixel[15]) > cb)
if(*(cache_0 + pixel[1]) > cb)
goto success;
else if(*(cache_0 + pixel[1]) < c_b)
continue;
else
if(*(cache_0 + pixel[8]) > cb)
goto success;
else
continue;
else
continue;
else if(*(cache_1+-6) < c_b)
continue;
else
if(*(cache_0+3) > cb)
if(*(cache_0 + pixel[15]) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else if(*(cache_2+4) < c_b)
if(*(cache_0 + pixel[1]) > cb)
if(*(cache_0 + pixel[3]) < c_b)
goto success;
else
continue;
else
continue;
else
if(*(cache_0 + pixel[9]) > cb)
if(*(cache_0 + pixel[1]) > cb)
if(*(cache_0 + pixel[13]) > cb)
if(*(cache_0 + pixel[15]) > cb)
if(*(cache_1+-6) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else if(*(cache_0 + pixel[1]) < c_b)
continue;
else
if(*(cache_0 + pixel[8]) > cb)
if(*(cache_1+-6) > cb)
if(*(cache_0 + pixel[13]) > cb)
if(*(cache_0 + pixel[15]) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(*(cache_0 + pixel[10]) < c_b)
if(*(cache_0+3) > cb)
if(*(cache_0 + pixel[13]) > cb)
if(*(cache_2+4) > cb)
if(*(cache_0 + pixel[3]) > cb)
if(*(cache_0 + pixel[15]) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else if(*(cache_0+3) < c_b)
continue;
else
if(*(cache_1+-6) > cb)
if(*(cache_0 + pixel[3]) > cb)
goto success;
else
continue;
else
continue;
else
if(*(cache_0 + pixel[3]) > cb)
if(*(cache_1+-6) > cb)
if(*(cache_0 + pixel[13]) > cb)
if(*(cache_2+4) > cb)
if(*(cache_0 + pixel[15]) > cb)
if(*(cache_0 + pixel[1]) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else if(*(cache_1+-6) < c_b)
if(*(cache_0+3) > cb)
goto success;
else
continue;
else
if(*(cache_0+3) > cb)
if(*(cache_0 + pixel[13]) > cb)
if(*(cache_0 + pixel[1]) > cb)
if(*(cache_2+4) > cb)
if(*(cache_0 + pixel[15]) > cb)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(*(cache_0+-3) < c_b)
if(*(cache_0 + pixel[15]) > cb)
if(*cache_2 < c_b)
if(*(cache_0 + pixel[6]) < c_b)
if(*(cache_0 + pixel[10]) < c_b)
if(*(cache_0 + pixel[7]) < c_b)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else if(*(cache_0 + pixel[15]) < c_b)
if(*(cache_0 + pixel[10]) > cb)
if(*(cache_0+3) > cb)
continue;
else if(*(cache_0+3) < c_b)
if(*(cache_0 + pixel[3]) < c_b)
if(*(cache_0 + pixel[13]) < c_b)
goto success;
else
continue;
else
continue;
else
if(*(cache_1+-6) < c_b)
if(*(cache_0 + pixel[3]) < c_b)
goto success;
else
continue;
else
continue;
else if(*(cache_0 + pixel[10]) < c_b)
if(*cache_2 < c_b)
if(*(cache_0 + pixel[9]) > cb)
if(*(cache_2+4) < c_b)
goto success;
else
continue;
else if(*(cache_0 + pixel[9]) < c_b)
if(*(cache_1+-6) > cb)
continue;
else if(*(cache_1+-6) < c_b)
if(*(cache_0 + pixel[13]) < c_b)
if(*(cache_0 + pixel[1]) > cb)
if(*(cache_0 + pixel[7]) < c_b)
goto success;
else
continue;
else if(*(cache_0 + pixel[1]) < c_b)
if(*(cache_0 + pixel[0]) > cb)
continue;
else if(*(cache_0 + pixel[0]) < c_b)
goto success;
else
if(*(cache_0 + pixel[7]) < c_b)
goto success;
else
continue;
else
if(*(cache_0 + pixel[7]) > cb)
continue;
else if(*(cache_0 + pixel[7]) < c_b)
if(*(cache_0 + pixel[8]) < c_b)
goto success;
else
continue;
else
if(*(cache_0 + pixel[0]) < c_b)
if(*(cache_0 + pixel[8]) < c_b)
goto success;
else
continue;
else
continue;
else
continue;
else
if(*(cache_0+3) < c_b)
if(*(cache_0 + pixel[3]) < c_b)
goto success;
else
continue;
else
continue;
else
if(*(cache_2+4) < c_b)
if(*(cache_1+-6) > cb)
continue;
else if(*(cache_1+-6) < c_b)
if(*(cache_0 + pixel[13]) < c_b)
if(*(cache_0 + pixel[1]) < c_b)
if(*(cache_0 + pixel[0]) < c_b)
goto success;
else
continue;
else
continue;
else
continue;
else
if(*(cache_0+3) < c_b)
if(*(cache_0 + pixel[3]) < c_b)
if(*(cache_0 + pixel[0]) < c_b)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(*(cache_0 + pixel[3]) < c_b)
if(*(cache_1+-6) > cb)
continue;
else if(*(cache_1+-6) < c_b)
if(*(cache_2+4) < c_b)
if(*(cache_0 + pixel[13]) < c_b)
if(*cache_2 < c_b)
if(*(cache_0 + pixel[1]) < c_b)
if(*(cache_0 + pixel[0]) < c_b)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(*(cache_0+3) < c_b)
if(*(cache_2+4) < c_b)
if(*cache_2 < c_b)
if(*(cache_0 + pixel[1]) < c_b)
if(*(cache_0 + pixel[13]) < c_b)
if(*(cache_0 + pixel[0]) < c_b)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(*(cache_0 + pixel[6]) < c_b)
if(*cache_2 < c_b)
if(*(cache_0 + pixel[7]) < c_b)
if(*(cache_1+-6) < c_b)
if(*(cache_0 + pixel[13]) < c_b)
if(*(cache_0 + pixel[10]) < c_b)
if(*(cache_0 + pixel[9]) < c_b)
if(*(cache_0 + pixel[8]) < c_b)
goto success;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
success:
if(total >= rsize) {
rsize *=2;
ret=(xy*)realloc(ret, rsize*sizeof(xy));
}
ret[total].x = cache_0-line_min;
ret[total++].y = y;
}
}
*num = total;
return ret;
}
int corner_score(const byte* imp, const int *pointer_dir, int barrier) {
/*The score for a positive feature is sum of the difference between the pixels
and the barrier if the difference is positive. Negative is similar.
The score is the max of those two.
B = {x | x = points on the Bresenham circle around c}
Sp = { I(x) - t | x E B , I(x) - t > 0 }
Sn = { t - I(x) | x E B, t - I(x) > 0}
Score = max sum(Sp), sum(Sn)*/
int cb = *imp + barrier;
int c_b = *imp - barrier;
int sp=0, sn = 0;
int i=0;
for(i=0; i<16; i++)
{
int p = imp[pointer_dir[i]];
if(p > cb)
sp += p-cb;
else if(p < c_b)
sn += c_b-p;
}
if(sp > sn)
return sp;
else
return sn;
}
xy* fast_nonmax(const byte* im, int xsize, int ysize, int stride,
xy* corners, int numcorners, int barrier, int* numnx) {
/*Create a list of integer pointer offstes, corresponding to the */
/*direction offsets in dir[]*/
int pointer_dir[16];
int* row_start = (int*) malloc(ysize * sizeof(int));
int* scores = (int*) malloc(numcorners * sizeof(int));
xy* nonmax_corners=(xy*)malloc(numcorners* sizeof(xy));
int num_nonmax=0;
int prev_row = -1;
int i, j;
int point_above = 0;
int point_below = 0;
(void) xsize;
pointer_dir[0] = 0 + 3 * stride;
pointer_dir[1] = 1 + 3 * stride;
pointer_dir[2] = 2 + 2 * stride;
pointer_dir[3] = 3 + 1 * stride;
pointer_dir[4] = 3 + 0 * stride;
pointer_dir[5] = 3 + -1 * stride;
pointer_dir[6] = 2 + -2 * stride;
pointer_dir[7] = 1 + -3 * stride;
pointer_dir[8] = 0 + -3 * stride;
pointer_dir[9] = -1 + -3 * stride;
pointer_dir[10] = -2 + -2 * stride;
pointer_dir[11] = -3 + -1 * stride;
pointer_dir[12] = -3 + 0 * stride;
pointer_dir[13] = -3 + 1 * stride;
pointer_dir[14] = -2 + 2 * stride;
pointer_dir[15] = -1 + 3 * stride;
if (numcorners < 5) {
free(row_start);
free(scores);
free(nonmax_corners);
return 0;
}
/*xsize ysize numcorners corners*/
/*Compute the score for each detected corner, and find where each row begins*/
/* (the corners are output in raster scan order). A beginning of -1 signifies*/
/* that there are no corners on that row.*/
for (i = 0; i < ysize; i++)
row_start[i] = -1;
for (i = 0; i< numcorners; i++) {
if (corners[i].y != prev_row) {
row_start[corners[i].y] = i;
prev_row = corners[i].y;
}
scores[i] = corner_score(im + corners[i].x + corners[i].y * stride,
pointer_dir, barrier);
}
/*Point above points (roughly) to the pixel above the one of interest, if there*/
/*is a feature there.*/
for (i = 0; i < numcorners; i++) {
int score = scores[i];
xy pos = corners[i];
//Check left
if (i > 0)
if (corners[i-1].x == pos.x-1 && corners[i-1].y == pos.y &&
scores[i-1] > score)
continue;
//Check right
if (i < (numcorners - 1))
if (corners[i+1].x == pos.x+1 && corners[i+1].y == pos.y && scores[i+1] > score)
continue;
//Check above (if there is a valid row above)
if (pos.y != 0 && row_start[pos.y - 1] != -1) {
//Make sure that current point_above is one
//row above.
if (corners[point_above].y < pos.y - 1)
point_above = row_start[pos.y-1];
//Make point_above point to the first of the pixels above the current point,
//if it exists.
for (; corners[point_above].y < pos.y &&
corners[point_above].x < pos.x - 1; point_above++) {}
for (j = point_above;
corners[j].y < pos.y && corners[j].x <= pos.x + 1; j++) {
int x = corners[j].x;
if ((x == pos.x - 1 || x ==pos.x || x == pos.x+1) && (scores[j] > score))
goto cont;
}
}
//Check below (if there is anything below)
if (pos.y != ysize-1 && row_start[pos.y + 1] != -1 &&
point_below < numcorners) { // Nothing below
if (corners[point_below].y < pos.y + 1)
point_below = row_start[pos.y+1];
// Make point below point to one of the pixels belowthe current point,
// if it exists.
for (; point_below < numcorners && corners[point_below].y == pos.y+1 &&
corners[point_below].x < pos.x - 1; point_below++) {}
for(j = point_below;
j < numcorners && corners[j].y == pos.y+1 &&
corners[j].x <= pos.x + 1; j++) {
int x = corners[j].x;
if ((x == pos.x - 1 || x ==pos.x || x == pos.x+1) && (scores[j] >score))
goto cont;
}
}
nonmax_corners[num_nonmax].x = corners[i].x;
nonmax_corners[num_nonmax].y = corners[i].y;
num_nonmax++;
cont:
;
}
*numnx = num_nonmax;
free(row_start);
free(scores);
return nonmax_corners;
}
//////////////////////////////////////////////////////////////////////////////
// Nonmax suppression wrapper
#define NONMAX_BARRIER 5
int NonmaxSuppression(unsigned char *frmbuf, int width, int height, int stride,
int *frm_corners, int num_frm_corners) {
int num_frm_corners_nonmax;
xy *frm_corners_nonmax_xy;
frm_corners_nonmax_xy = fast_nonmax(frmbuf, width, height, stride,
(xy *)frm_corners, num_frm_corners,
NONMAX_BARRIER, &num_frm_corners_nonmax);
if (frm_corners_nonmax_xy &&
num_frm_corners_nonmax <= num_frm_corners) {
memcpy(frm_corners, frm_corners_nonmax_xy,
sizeof(xy) * num_frm_corners_nonmax);
free(frm_corners_nonmax_xy);
return num_frm_corners_nonmax;
} else {
return num_frm_corners;
}
}
//////////////////////////////////////////////////////////////////////////////
// Fast_9 wrapper
#define FAST_BARRIER 40
int FastCornerDetect(unsigned char *buf, int width, int height, int stride,
int *points, int max_points) {
int num_points;
xy *frm_corners_xy;
frm_corners_xy = fast_corner_detect_9(buf, width, height, stride,
FAST_BARRIER, &num_points);
num_points =
(num_points <= max_points ? num_points : max_points);
if (num_points > 0 && frm_corners_xy) {
memcpy(points, frm_corners_xy, sizeof(xy) * num_points);
free(frm_corners_xy);
return NonmaxSuppression(buf, width, height, stride, points, num_points);
} else {
return 0;
}
}
//////////////////////////////////////////////////////////////////////////////////
// Harris Corner detector
#define HARRIS_THRESH 50
#define GAUSS_FILT_SZ 7
#define GAUSS_FILT_SZ_BY2 ((GAUSS_FILT_SZ - 1) / 2)
double GaussianKernel[GAUSS_FILT_SZ_BY2 + 1][GAUSS_FILT_SZ_BY2 + 1] = {
{0.046701777738928, 0.041214174199798, 0.028326060061745, 0.01516184737296,},
{0.041214174199798, 0.036371381073904, 0.024997660266915, 0.013380283344101},
{0.028326060061745, 0.024997660266915, 0.017180623896310, 0.009196125289586},
{0.015161847372964, 0.013380283344101, 0.009196125289586, 0.004922331159344},
};
int HarrisCornerDetect(unsigned char *buf, int width, int height, int stride,
int *points, int max_points) {
const double eps = 1e-6;
int i, j, num_points = 0;
double *gx2 = (double *)malloc(width * height * sizeof(double));
double *gy2 = (double *)malloc(width * height * sizeof(double));
double *gxy = (double *)malloc(width * height * sizeof(double));
double *met = (double *)malloc(width * height * sizeof(double));
double max_met = 0;
double thresh;
if (width < GAUSS_FILT_SZ + 2 || height < GAUSS_FILT_SZ + 2)
return 0;
// Sobel operator
for (i = 1; i < height - 1; ++i) {
for (j = 1; j < width - 1; ++j) {
gx2[i * width + j] = (buf[(i + 1) * stride + j] - buf[(i - 1) * stride + j]) * 2 +
(buf[(i + 1) * stride + j - 1] - buf[(i - 1) * stride + j - 1]) +
(buf[(i + 1) * stride + j + 1] - buf[(i - 1) * stride + j + 1]);
gy2[i * width + j] = (buf[i * stride + j + 1] - buf[i * stride + j - 1]) * 2 +
(buf[(i - 1) * stride + j + 1] - buf[(i - 1) * stride + j - 1]) +
(buf[(i + 1) * stride + j + 1] - buf[(i + 1) * stride + j - 1]);
gx2[i * width + j] /= 8;
gy2[i * width + j] /= 8;
gxy[i * width + j] = gx2[i * width + j] * gy2[i * width + j];
gx2[i * width + j] *= gx2[i * width + j];
gy2[i * width + j] *= gy2[i * width + j];
}
}
// Gaussian filter and metric computation
for (i = 1 + GAUSS_FILT_SZ_BY2; i < height - 1 - GAUSS_FILT_SZ_BY2; ++i) {
for (j = 1 + GAUSS_FILT_SZ_BY2; j < width - 1 - GAUSS_FILT_SZ_BY2; ++j) {
double valx2 = 0;
double valy2 = 0;
double valxy = 0;
int k, l;
valx2 = GaussianKernel[0][0] * gx2[i * width + j];
valy2 = GaussianKernel[0][0] * gy2[i * width + j];
valxy = GaussianKernel[0][0] * gxy[i * width + j];
for (k = 1; k <= GAUSS_FILT_SZ_BY2; k++) {
valx2 += GaussianKernel[k][0] * (gx2[(i + k) * width + j] +
gx2[(i - k) * width + j]);
valy2 += GaussianKernel[k][0] * (gy2[(i + k) * width + j] +
gy2[(i - k) * width + j]);
valxy += GaussianKernel[k][0] * (gxy[(i + k) * width + j] +
gxy[(i - k) * width + j]);
}
for (l = 1; l <= GAUSS_FILT_SZ_BY2; l++) {
valx2 += GaussianKernel[0][l] * (gx2[i * width + j + l] +
gx2[i * width + j - l]);
valy2 += GaussianKernel[0][l] * (gy2[i * width + j + l] +
gy2[i * width + j - l]);
valxy += GaussianKernel[0][l] * (gxy[i * width + j + l] +
gxy[i * width + j - l]);
}
for (k = 1; k <= GAUSS_FILT_SZ_BY2; k++) {
for (l = 1; l <= GAUSS_FILT_SZ_BY2; ++l) {
valx2 += GaussianKernel[k][l] * (gx2[(i + k) * width + (j + l)] +
gx2[(i - k) * width + (j + l)] +
gx2[(i + k) * width + (j - l)] +
gx2[(i - k) * width + (j - l)]);
valy2 += GaussianKernel[k][l] * (gy2[(i + k) * width + (j + l)] +
gy2[(i - k) * width + (j + l)] +
gy2[(i + k) * width + (j - l)] +
gy2[(i - k) * width + (j - l)]);
valxy += GaussianKernel[k][l] * (gxy[(i + k) * width + (j + l)] +
gxy[(i - k) * width + (j + l)] +
gxy[(i + k) * width + (j - l)] +
gxy[(i - k) * width + (j - l)]);
}
}
met[i * width + j] = (valx2 * valy2 - valxy * valxy)/(valx2 + valy2 + eps);
if (met[i * width + j] > max_met) max_met = met[i * width + j];
}
}
thresh = max_met < 2*HARRIS_THRESH ? max_met/2 : HARRIS_THRESH;
free(gx2);
free(gy2);
free(gxy);
for (i = 1 + GAUSS_FILT_SZ_BY2; i < height - 1 - GAUSS_FILT_SZ_BY2; ++i) {
for (j = 1 + GAUSS_FILT_SZ_BY2; j < width - 1 - GAUSS_FILT_SZ_BY2; ++j) {
if (met[i * width + j] > thresh) {
points[num_points * 2] = j;
points[num_points * 2 + 1] = i;
num_points++;
if (num_points == max_points) {
free(met);
return num_points;
}
}
}
}
free(met);
return NonmaxSuppression(buf, width, height, stride, points, num_points);
}