Created
May 6, 2011 09:50
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#include <useopencv.h> | |
template <typename T> | |
class BoxMat { | |
public: | |
const cv::Mat_<T>& mat; | |
int offsetX, offsetY; | |
int rows, cols; | |
BoxMat(const cv::Mat_<T>& mat, const int offsetY, const int offsetX, const cv::Size size) | |
: mat(mat), offsetY(offsetY), offsetX(offsetX) , rows(size.height), cols(size.width) | |
{}; | |
T operator() (const int y, const int x) const { | |
assert(y < rows && x < cols); | |
return | |
(offsetX + x >= mat.cols || offsetY + y >= mat.rows) ? | |
T() : mat(offsetY + y, offsetX + x); | |
} | |
}; | |
template <typename SrcType, typename DstType, class Func> | |
void box_filter(const cv::Mat_<SrcType>& src, cv::Mat_<DstType>& dst, const cv::Size& size, Func& f){ | |
assert(src.cols == dst.cols && src.rows == dst.rows); | |
for(int y=0; y < src.rows; ++y){ | |
for(int x=0; x < src.cols; ++x){ | |
dst(y, x) = f( BoxMat<SrcType>(src, y, x, size) ); | |
} | |
} | |
} | |
int main() | |
{ | |
cv::Mat_<uchar> lena = cv::imread("c:/lena.bmp", 0); | |
cv::Mat_<float> dlena(lena.size()); | |
box_filter(lena, dlena, cv::Size(2, 1), [](const BoxMat<uchar>& m)->float { | |
return std::abs(m(0, 0) - m(0, 1)) / 255.0f; | |
}); | |
cv::imshow("src", lena); | |
cv::imshow("dst", dlena); | |
cv::waitKey(); | |
} |
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