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Specialize the FilterValid routine to not consider the pixels as pixels but rather as values. This seems somewhat inelegant but it's fine in terms of a quick fix.

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This commit is contained in:
Pavel Krajcevski 2013-10-12 16:32:09 -04:00
parent 5af29c87d0
commit 996c81ef01
1 changed files with 34 additions and 11 deletions
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45
Base/src/Image.cpp
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@ -218,19 +218,42 @@ double Image<PixelType>::ComputePSNR(Image<PixelType> *other) {
return 10 * log10(maxi/mse);
}
template<typename PixelType>
static Image<PixelType> FilterValid(const Image<PixelType> &img, uint32 size, double sigma) {
static Image<IPixel> FilterValid(const Image<IPixel> &img, uint32 size, double sigma) {
assert(size % 2);
Image<IPixel> gaussian(size, size);
GenerateGaussianKernel(gaussian, size, sigma);
Image<PixelType> tmp = img;
tmp.Filter(gaussian);
Image<PixelType> out(tmp.GetWidth() - size + 1, tmp.GetHeight() - size + 1);
uint32 halfSz = size >> 1;
for(uint32 j = halfSz; j < img.GetHeight()-halfSz; j++) {
for(uint32 i = halfSz; i < img.GetWidth()-halfSz; i++) {
out(i-halfSz, j-halfSz) = tmp(i, j);
double sum = 0.0;
for(uint32 j = 0; j < size; j++) {
for(uint32 i = 0; i < size; i++) {
sum += static_cast<float>(gaussian(i, j));
}
}
for(uint32 j = 0; j < size; j++) {
for(uint32 i = 0; i < size; i++) {
double v = static_cast<float>(gaussian(i, j));
gaussian(i, j) = static_cast<float>(v / sum);
}
}
int32 h = static_cast<int32>(img.GetHeight());
int32 w = static_cast<int32>(img.GetWidth());
Image<IPixel> out(img.GetWidth() - size + 1, img.GetHeight() - size + 1);
int32 halfSz = static_cast<int32>(size) >> 1;
for(int32 j = halfSz; j < h-halfSz; j++) {
for(int32 i = halfSz; i < w-halfSz; i++) {
int32 xoffset = -halfSz;
int32 yoffset = -halfSz;
double result = 0;
for(int32 y = 0; y < static_cast<int32>(size); y++)
for(int32 x = 0; x < static_cast<int32>(size); x++) {
double s = static_cast<float>(gaussian(x, y));
result += s * static_cast<float>(img(i+xoffset+x, j+yoffset+y));
}
out(i+xoffset, j+yoffset) = static_cast<float>(result);
}
}
@ -262,8 +285,8 @@ double Image<PixelType>::ComputeSSIM(Image<PixelType> *other, double *mssim) {
for(uint32 j = 0; j < GetHeight(); j++) {
for(uint32 i = 0; i < GetWidth(); i++) {
img1(i, j) = 255.0f * static_cast<float>(img1(i, j));
img2(i, j) = 255.0f * static_cast<float>(img2(i, j));
img1(i, j) = 255.0 * static_cast<float>(img1(i, j));
img2(i, j) = 255.0 * static_cast<float>(img2(i, j));
}
}