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replaced filter (from the nearest to linear) mode when resizing image in gpu::HOGDescriptor

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This commit is contained in:
Alexey Spizhevoy 2010-12-03 10:14:01 +00:00
parent 3dd0e31976
commit 2a2590bae2
1 changed files with 9 additions and 4 deletions
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13
modules/gpu/src/cuda/hog.cu
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@ -696,8 +696,8 @@ void compute_gradients_8UC1(int nbins, int height, int width, const DevMem2D& im
//-------------------------------------------------------------------
// Resize
texture<uchar4, 2> resize8UC4_tex;
texture<unsigned char, 2> resize8UC1_tex;
texture<uchar4, 2, cudaReadModeNormalizedFloat> resize8UC4_tex;
texture<unsigned char, 2, cudaReadModeNormalizedFloat> resize8UC1_tex;
extern "C" __global__ void resize_8UC4_kernel(float sx, float sy, DevMem2D dst)
@ -706,7 +706,10 @@ extern "C" __global__ void resize_8UC4_kernel(float sx, float sy, DevMem2D dst)
unsigned int y = blockIdx.y * blockDim.y + threadIdx.y;
if (x < dst.cols && y < dst.rows)
((uchar4*)dst.ptr(y))[x] = tex2D(resize8UC4_tex, x * sx, y * sy);
{
float4 val = tex2D(resize8UC4_tex, x * sx, y * sy);
((uchar4*)dst.ptr(y))[x] = make_uchar4(val.x * 255, val.y * 255, val.z * 255, val.w * 255);
}
}
@ -714,6 +717,7 @@ void resize_8UC4(const DevMem2D& src, DevMem2D dst)
{
cudaChannelFormatDesc desc = cudaCreateChannelDesc<uchar4>();
cudaBindTexture2D(0, resize8UC4_tex, src.data, desc, src.cols, src.rows, src.step);
resize8UC4_tex.filterMode = cudaFilterModeLinear;
dim3 threads(32, 8);
dim3 grid(div_up(dst.cols, threads.x), div_up(dst.rows, threads.y));
@ -732,7 +736,7 @@ extern "C" __global__ void resize_8UC1_kernel(float sx, float sy, DevMem2D dst)
unsigned int y = blockIdx.y * blockDim.y + threadIdx.y;
if (x < dst.cols && y < dst.rows)
((unsigned char*)dst.ptr(y))[x] = tex2D(resize8UC1_tex, x * sx, y * sy);
((unsigned char*)dst.ptr(y))[x] = tex2D(resize8UC1_tex, x * sx, y * sy) * 255;
}
@ -740,6 +744,7 @@ void resize_8UC1(const DevMem2D& src, DevMem2D dst)
{
cudaChannelFormatDesc desc = cudaCreateChannelDesc<unsigned char>();
cudaBindTexture2D(0, resize8UC1_tex, src.data, desc, src.cols, src.rows, src.step);
resize8UC1_tex.filterMode = cudaFilterModeLinear;
dim3 threads(32, 8);
dim3 grid(div_up(dst.cols, threads.x), div_up(dst.rows, threads.y));