opencv/samples/cpp/morphology2.cpp

97 lines
2.6 KiB
C++
Raw Normal View History

#include "opencv2/imgproc/imgproc.hpp"
2014-07-04 16:48:15 +02:00
#include "opencv2/imgcodecs.hpp"
#include "opencv2/highgui/highgui.hpp"
#include <stdlib.h>
#include <stdio.h>
using namespace cv;
2012-06-07 19:21:29 +02:00
static void help()
2010-11-29 08:57:03 +01:00
{
2010-12-04 09:30:56 +01:00
printf("\nShow off image morphology: erosion, dialation, open and close\n"
2012-06-07 19:21:29 +02:00
"Call:\n morphology2 [image]\n"
2014-03-03 16:37:47 +01:00
"This program also shows use of rect, ellipse and cross kernels\n\n");
2010-11-29 08:57:03 +01:00
printf( "Hot keys: \n"
"\tESC - quit the program\n"
"\tr - use rectangle structuring element\n"
"\te - use elliptic structuring element\n"
"\tc - use cross-shaped structuring element\n"
"\tSPACE - loop through all the options\n" );
}
Mat src, dst;
int element_shape = MORPH_RECT;
//the address of variable which receives trackbar position update
int max_iters = 10;
int open_close_pos = 0;
int erode_dilate_pos = 0;
// callback function for open/close trackbar
2012-06-07 19:21:29 +02:00
static void OpenClose(int, void*)
{
int n = open_close_pos - max_iters;
int an = n > 0 ? n : -n;
Mat element = getStructuringElement(element_shape, Size(an*2+1, an*2+1), Point(an, an) );
if( n < 0 )
morphologyEx(src, dst, MORPH_OPEN, element);
else
morphologyEx(src, dst, MORPH_CLOSE, element);
imshow("Open/Close",dst);
}
// callback function for erode/dilate trackbar
2012-06-07 19:21:29 +02:00
static void ErodeDilate(int, void*)
{
int n = erode_dilate_pos - max_iters;
int an = n > 0 ? n : -n;
Mat element = getStructuringElement(element_shape, Size(an*2+1, an*2+1), Point(an, an) );
if( n < 0 )
erode(src, dst, element);
else
dilate(src, dst, element);
imshow("Erode/Dilate",dst);
}
int main( int argc, char** argv )
{
2014-09-13 16:28:41 +02:00
char* filename = argc == 2 ? argv[1] : (char*)"../data/baboon.jpg";
if( (src = imread(filename,1)).empty() )
return -1;
2010-11-29 08:57:03 +01:00
help();
//create windows for output images
namedWindow("Open/Close",1);
namedWindow("Erode/Dilate",1);
open_close_pos = erode_dilate_pos = max_iters;
createTrackbar("iterations", "Open/Close",&open_close_pos,max_iters*2+1,OpenClose);
createTrackbar("iterations", "Erode/Dilate",&erode_dilate_pos,max_iters*2+1,ErodeDilate);
for(;;)
{
int c;
OpenClose(open_close_pos, 0);
ErodeDilate(erode_dilate_pos, 0);
c = waitKey(0);
if( (char)c == 27 )
break;
if( (char)c == 'e' )
element_shape = MORPH_ELLIPSE;
else if( (char)c == 'r' )
element_shape = MORPH_RECT;
else if( (char)c == 'c' )
element_shape = MORPH_CROSS;
else if( (char)c == ' ' )
element_shape = (element_shape + 1) % 3;
}
return 0;
}