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more optimization for warpAffine and warpPerspective

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Add new OpenCL kernels for bicubic interploation, it is 20% faster
than current warp image kernel with bicubic interploation.

Signed-off-by: Li Peng <peng.li@intel.com>
This commit is contained in:
Li Peng
2016-11-29 15:28:53 +08:00
parent c47267ef7f
commit 2ca5a7e862
3 changed files with 199 additions and 5 deletions
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modules/imgproc/src/imgwarp.cpp
+3 -3
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@@ -5662,15 +5662,15 @@ static bool ocl_warpTransform_cols4(InputArray _src, OutputArray _dst, InputArra
if ( !dev.isIntel() || !(type == CV_8UC1) ||
!(dtype == CV_8UC1) || !(_dst.cols() % 4 == 0) ||
!(borderType == cv::BORDER_CONSTANT &&
(interpolation == cv::INTER_NEAREST || interpolation == cv::INTER_LINEAR)))
(interpolation == cv::INTER_NEAREST || interpolation == cv::INTER_LINEAR || interpolation == cv::INTER_CUBIC)))
return false;
const char * const warp_op[2] = { "Affine", "Perspective" };
const char * const interpolationMap[3] = { "nearest", "linear", NULL };
const char * const interpolationMap[3] = { "nearest", "linear", "cubic" };
ocl::ProgramSource program = ocl::imgproc::warp_transform_oclsrc;
String kernelName = format("warp%s_%s_8u", warp_op[op_type], interpolationMap[interpolation]);
bool is32f = (interpolation == INTER_LINEAR);
bool is32f = (interpolation == INTER_CUBIC || interpolation == INTER_LINEAR) && op_type == OCL_OP_AFFINE;
int wdepth = interpolation == INTER_NEAREST ? depth : std::max(is32f ? CV_32F : CV_32S, depth);
int sctype = CV_MAKETYPE(wdepth, cn);