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added gpu::dft implemented via CUFFT

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This commit is contained in:
Alexey Spizhevoy
2010-12-23 09:24:33 +00:00
parent da1fb6c50a
commit 09735fd208
3 changed files with 362 additions and 29 deletions
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21
modules/gpu/include/opencv2/gpu/gpu.hpp
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@@ -628,15 +628,28 @@ namespace cv
//! computes minimum eigen value of 2x2 derivative covariation matrix at each pixel - the cornerness criteria
CV_EXPORTS void cornerMinEigenVal(const GpuMat& src, GpuMat& dst, int blockSize, int ksize, int borderType=BORDER_REFLECT101);
//! performs per-element multiplication of two full (i.e. not packed) Fourier spectrums
//! supports only 32FC2 matrixes (interleaved format)
//! performs per-element multiplication of two full (not packed) Fourier spectrums
//! supports 32FC2 matrixes only (interleaved format)
CV_EXPORTS void mulSpectrums(const GpuMat& a, const GpuMat& b, GpuMat& c, int flags, bool conjB=false);
//! performs per-element multiplication of two full (i.e. not packed) Fourier spectrums
//! supports only 32FC2 matrixes (interleaved format)
//! performs per-element multiplication of two full (not packed) Fourier spectrums
//! supports 32FC2 matrixes only (interleaved format)
CV_EXPORTS void mulAndScaleSpectrums(const GpuMat& a, const GpuMat& b, GpuMat& c, int flags,
float scale, bool conjB=false);
//! performs a forward or inverse discrete Fourier transform (1D or 2D) of floating point matrix
//!
//! If the source matrix is not continous, then additional copy will be done,
//! so to avoid copying ensure the source matrix is continous one.
//!
//! Being implemented via CUFFT real-to-complex transform result contains only non-redundant values
//! in CUFFT's format. Result as full complex matrix for such kind of transform cannot be retrieved.
//!
//! For complex-to-real transform it is assumed that the source matrix is packed in CUFFT's format, which
//! doesn't allow us to retrieve parity of the destiantion matrix dimension (along which the first step
//! of DFT is performed). You must specifiy odd case explicitely.
CV_EXPORTS void dft(const GpuMat& src, GpuMat& dst, int flags=0, int nonZeroRows=0, bool odd=false);
//! computes convolution (or cross-correlation) of two images using discrete Fourier transform
//! supports source images of 32FC1 type only
//! result matrix will have 32FC1 type