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Updated optimal block size estimation for the convolve() function

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This commit is contained in:
Alexey Spizhevoy
2011-10-03 14:05:52 +00:00
parent bee68e519a
commit 8a799aa89a
5 changed files with 37 additions and 16 deletions
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11
modules/gpu/src/imgproc.cpp
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@@ -1546,18 +1546,23 @@ void cv::gpu::ConvolveBuf::create(Size image_size, Size templ_size)
Size cv::gpu::ConvolveBuf::estimateBlockSize(Size result_size, Size templ_size)
{
int scale = 40;
Size bsize_min(1024, 1024);
Size bsize_min(512, 512);
// Check whether we use Fermi generation or newer GPU
if (DeviceInfo().majorVersion() >= 2)
{
bsize_min.width = 2048;
bsize_min.height = 2048;
bsize_min.width = 1024;
bsize_min.height = 1024;
}
Size bsize(std::max(templ_size.width * scale, bsize_min.width),
std::max(templ_size.height * scale, bsize_min.height));
int blocks_per_row = (result_size.width + bsize.width - 1) / bsize.width;
int blocks_per_col = (result_size.height + bsize.height - 1) / bsize.height;
bsize.width = (result_size.width + blocks_per_row - 1) / blocks_per_row;
bsize.height = (result_size.height + blocks_per_col - 1) / blocks_per_col;
bsize.width = std::min(bsize.width, result_size.width);
bsize.height = std::min(bsize.height, result_size.height);
return bsize;