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ocl: Add dft based convolve implementation.

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Match template in ocl module now can be utilized with dft based
convolve. Note this feature needs OpenCV to be built with clAmdFft
library.
This commit is contained in:
peng xiao
2013-04-08 15:19:44 +08:00
parent 67073daf19
commit 77501f3ed0
5 changed files with 432 additions and 11 deletions
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24
modules/ocl/include/opencv2/ocl.hpp
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@@ -540,9 +540,29 @@ namespace cv
CV_EXPORTS oclMatExpr operator * (const oclMat &src1, const oclMat &src2);
CV_EXPORTS oclMatExpr operator / (const oclMat &src1, const oclMat &src2);
//! computes convolution of two images
struct CV_EXPORTS ConvolveBuf
{
Size result_size;
Size block_size;
Size user_block_size;
Size dft_size;
oclMat image_spect, templ_spect, result_spect;
oclMat image_block, templ_block, result_data;
void create(Size image_size, Size templ_size);
static Size estimateBlockSize(Size result_size, Size templ_size);
};
//! computes convolution of two images, may use discrete Fourier transform
//! support only CV_32FC1 type
CV_EXPORTS void convolve(const oclMat &image, const oclMat &temp1, oclMat &result);
CV_EXPORTS void convolve(const oclMat &image, const oclMat &temp1, oclMat &result, bool ccorr = false);
CV_EXPORTS void convolve(const oclMat &image, const oclMat &temp1, oclMat &result, bool ccorr, ConvolveBuf& buf);
//! Performs a per-element multiplication of two Fourier spectrums.
//! Only full (not packed) CV_32FC2 complex spectrums in the interleaved format are supported for now.
//! support only CV_32FC2 type
CV_EXPORTS void mulSpectrums(const oclMat &a, const oclMat &b, oclMat &c, int flags, float scale, bool conjB = false);
CV_EXPORTS void cvtColor(const oclMat &src, oclMat &dst, int code , int dcn = 0);