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LBPFilter.cpp
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LBPFilter.cpp
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//
// LBPFilter.cpp
// opencv_fd_demo
//
// Created by Igor Gridchyn on 10/4/12.
// Copyright (c) 2012 Igor Gridchyn. All rights reserved.
//
#include "LBPFilter.h"
void LBPFilter::filterImage(IplImage* src, IplImage* dst)
{
char* p = src->imageData + src->widthStep + 1;
char* dp = dst->imageData + dst->widthStep + 1;
for (int y = 1; y < src->height - 1; ++y, p += 2, dp += 2) {
for (int x = 1; x < src->width - 1; ++x, ++p, ++dp) {
*dp = 0;
*dp |= *(p - src->widthStep - 1) < *p;
*dp <<= 1;
*dp |= *(p - src->widthStep) < *p;
*dp <<= 1;
*dp |= *(p - src->widthStep + 1) < *p;
*dp <<= 1;
*dp |= *(p + 1) < *p;
*dp <<= 1;
*dp |= *(p + src->widthStep + 1) < *p;
*dp <<= 1;
*dp |= *(p + src->widthStep) < *p;
*dp <<= 1;
*dp |= *(p + src->widthStep - 1) < *p;
*dp <<= 1;
*dp |= *(p - 1) < *p;
}
}
dp = dst->imageData + 1;
p = src->imageData + 1;
for (int x = 1; x < src->width - 1; ++x, ++p, ++dp) {
*dp = 0;
*dp |= *(p + 1) < *p;
*dp <<= 1;
*dp |= *(p + src->widthStep + 1) < *p;
*dp <<= 1;
*dp |= *(p + src->widthStep) < *p;
*dp <<= 1;
*dp |= *(p + src->widthStep - 1) < *p;
*dp <<= 1;
*dp |= *(p - 1) < *p;
}
dp = dst->imageData + ( dst->height - 1 ) * dst->widthStep + 1;
p = src->imageData + ( src->height - 1 ) * src->widthStep + 1;
for (int x = 1; x < src->width - 1; ++x, ++p, ++dp) {
*dp = 0;
*dp |= *(p - src->widthStep - 1) < *p;
*dp <<= 1;
*dp |= *(p - src->widthStep) < *p;
*dp <<= 1;
*dp |= *(p - src->widthStep + 1) < *p;
*dp <<= 1;
*dp |= *(p + 1) < *p;
*dp <<= 4;
*dp |= *(p - 1) < *p;
}
dp = dst->imageData + dst->widthStep;
p = src->imageData + src->widthStep;
for (int y = 1; y < src->height - 1; ++y, dp += dst->widthStep, p += src->widthStep)
{
*dp = 0;
*dp |= *(p - src->widthStep) < *p;
*dp <<= 1;
*dp |= *(p - src->widthStep + 1) < *p;
*dp <<= 1;
*dp |= *(p + 1) < *p;
*dp <<= 1;
*dp |= *(p + src->widthStep + 1) < *p;
*dp <<= 1;
*dp |= *(p + src->widthStep) < *p;
*dp <<= 2;
}
dp = dst->imageData + 2 * ( dst->widthStep ) - 1;
p = src->imageData + 2 * ( src->widthStep ) - 1;
for (int y = 1; y < src->height - 1; ++y, dp += dst->widthStep, p += src->widthStep)
{
*dp = 0;
*dp |= *(p - src->widthStep - 1) < *p;
*dp <<= 1;
*dp |= *(p - src->widthStep) < *p;
*dp <<= 4;
*dp |= *(p + src->widthStep) < *p;
*dp <<= 1;
*dp |= *(p + src->widthStep - 1) < *p;
*dp <<= 1;
*dp |= *(p - 1) < *p;
}
dp = dst->imageData;
p = src->imageData;
*dp = ( (*(p+1) < *p) << 4 ) + ( ( *(p + src->widthStep + 1) < *p) << 3 ) + ( ( *(p + src->widthStep) < *p ) << 2 );
dp = dst->imageData + dst->widthStep - 1;
p = src->imageData + src->widthStep - 1;
*dp = ( *(p-1) < *p ) + ( (*(p + src->widthStep - 1) < *p) << 1 ) + ( (*(p + src->widthStep) < *p) << 2 );
dp = dst->imageData + ( dst->height - 1 ) * dst->widthStep;
p = src->imageData + ( src->height - 1 ) * src->widthStep;
*dp = ( (*(p - src->widthStep) < *p) << 6 ) + ( ( *(p - src->widthStep + 1) < *p) << 5 ) + ( ( *(p + 1) < *p ) << 4 );
dp = dst->imageData + ( dst->height ) * dst->widthStep - 1;
p = src->imageData + ( src->height ) * src->widthStep - 1;
*dp = ( *(p-1) < *p ) + ( ( *( p - src->widthStep - 1 ) < *p) << 7 ) + ( (*(p - src->widthStep) < *p) << 6 );
}
void LBPFilter::filterImageCLBP(IplImage* src, IplImage* dst)
{
char* p = src->imageData + src->widthStep + 1;
char* dp = dst->imageData + src->widthStep + 1;
for (int y = 1; y < src->height - 1; ++y, p += 2, dp += 2) {
for (int x = 1; x < src->width - 1; ++x, ++p, ++dp) {
*dp |= *(p - src->widthStep - 1) > *(p - src->widthStep);
*dp <<= 1;
*dp |= *(p - src->widthStep) > *(p - src->widthStep + 1);
*dp <<= 1;
*dp |= *(p - src->widthStep + 1) > *(p + 1);
*dp <<= 1;
*dp |= *(p + 1) > *(p + src->widthStep + 1);
*dp <<= 1;
*dp |= *(p + src->widthStep + 1) > *(p + src->widthStep) ;
*dp <<= 1;
*dp |= *(p + src->widthStep) > *(p + src->widthStep - 1);
*dp <<= 1;
*dp |= *(p + src->widthStep - 1) > *(p - 1);
*dp <<= 1;
*dp |= *(p - 1) > *(p - src->widthStep - 1);
}
}
}
void LBPFilter::GetLBPHistogramFeatures(IplImage* lbpImg, unsigned char* feats, CvSize windowSize, const int bins)
{
const int binSize = 256 / bins;
char* imgData = lbpImg->imageData;
for (int wy = 0; wy < lbpImg->height / windowSize.height; wy++) {
for (int wx = 0; wx < lbpImg->width / windowSize.width; wx++) {
imgData = lbpImg->imageData + wy * windowSize.height * lbpImg->width + wx * windowSize.width;
for (int dy = 0; dy < windowSize.height; ++dy) {
for (int dx = 0; dx < windowSize.width; ++dx) {
//std::cout << "*(imgData) = " << (int)*(imgData++) << ", ";
++ *(feats + *((uchar*)(imgData++)) / binSize);
}
imgData += lbpImg->widthStep - windowSize.width;
}
feats += bins;
}
}
}