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fixed mixed-type exp and log functions, used in HMMs (thanks to V. Mityaev)

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This commit is contained in:
Vadim Pisarevsky 2010-05-21 12:07:00 +00:00
parent d199100deb
commit 33447e0bba
1 changed files with 7 additions and 6 deletions
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13
modules/imgproc/include/opencv2/imgproc/compat_c.h
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@ -50,6 +50,7 @@
#ifndef __OPENCV_IMGPROC_COMPAT_C_H__
#define __OPENCV_IMGPROC_COMPAT_C_H__
#include <math.h>
#include <string.h>
#ifdef __cplusplus
@ -318,17 +319,17 @@ CV_INLINE void cvbReciprocal( const float* x, float* y, int len )
CV_INLINE void cvbFastExp( const float* x, double* y, int len )
{
CvMat mx = cvMat( 1, len, CV_32F, (void*)x );
CvMat my = cvMat( 1, len, CV_64F, y );
cvExp( &mx, &my );
int i;
for( i = 0; i < len; i++ )
y[i] = exp((double)x[i]);
}
CV_INLINE void cvbFastLog( const double* x, float* y, int len )
{
CvMat mx = cvMat( 1, len, CV_64F, (void*)x );
CvMat my = cvMat( 1, len, CV_32F, y );
cvLog( &mx, &my );
int i;
for( i = 0; i < len; i++ )
y[i] = (float)log(x[i]);
}