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/*M///////////////////////////////////////////////////////////////////////////////////////
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// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
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// By downloading, copying, installing or using the software you agree to this license.
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// If you do not agree to this license, do not download, install,
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// copy or use the software.
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// For Open Source Computer Vision Library
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// Copyright (C) 2000-2008, Intel Corporation, all rights reserved.
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// Copyright (C) 2009, Willow Garage Inc., all rights reserved.
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// Third party copyrights are property of their respective owners.
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// Redistribution and use in source and binary forms, with or without modification,
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// are permitted provided that the following conditions are met:
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// * Redistribution's of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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// * Redistribution's in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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// * The name of the copyright holders may not be used to endorse or promote products
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// derived from this software without specific prior written permission.
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// This software is provided by the copyright holders and contributors "as is" and
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// any express or implied warranties, including, but not limited to, the implied
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// warranties of merchantability and fitness for a particular purpose are disclaimed.
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// In no event shall the Intel Corporation or contributors be liable for any direct,
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// indirect, incidental, special, exemplary, or consequential damages
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// (including, but not limited to, procurement of substitute goods or services;
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// loss of use, data, or profits; or business interruption) however caused
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// and on any theory of liability, whether in contract, strict liability,
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// or tort (including negligence or otherwise) arising in any way out of
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// the use of this software, even if advised of the possibility of such damage.
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#if !defined CUDA_DISABLER
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#include "opencv2/core/cuda/common.hpp"
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namespace cv { namespace cuda { namespace device
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__global__ void blendLinearKernel(int rows, int cols, int cn, const PtrStep<T> img1, const PtrStep<T> img2,
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const PtrStepf weights1, const PtrStepf weights2, PtrStep<T> result)
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int x = blockIdx.x * blockDim.x + threadIdx.x;
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int y = blockIdx.y * blockDim.y + threadIdx.y;
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if (y < rows && x < cols)
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float w1 = weights1.ptr(y)[x_];
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float w2 = weights2.ptr(y)[x_];
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T p1 = img1.ptr(y)[x];
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T p2 = img2.ptr(y)[x];
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result.ptr(y)[x] = (p1 * w1 + p2 * w2) / (w1 + w2 + 1e-5f);
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void blendLinearCaller(int rows, int cols, int cn, PtrStep<T> img1, PtrStep<T> img2, PtrStepf weights1, PtrStepf weights2, PtrStep<T> result, cudaStream_t stream)
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dim3 grid(divUp(cols * cn, threads.x), divUp(rows, threads.y));
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blendLinearKernel<<<grid, threads, 0, stream>>>(rows, cols * cn, cn, img1, img2, weights1, weights2, result);
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cudaSafeCall( cudaGetLastError() );
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cudaSafeCall(cudaDeviceSynchronize());
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template void blendLinearCaller<uchar>(int, int, int, PtrStep<uchar>, PtrStep<uchar>, PtrStepf, PtrStepf, PtrStep<uchar>, cudaStream_t stream);
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template void blendLinearCaller<float>(int, int, int, PtrStep<float>, PtrStep<float>, PtrStepf, PtrStepf, PtrStep<float>, cudaStream_t stream);
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__global__ void blendLinearKernel8UC4(int rows, int cols, const PtrStepb img1, const PtrStepb img2,
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const PtrStepf weights1, const PtrStepf weights2, PtrStepb result)
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int x = blockIdx.x * blockDim.x + threadIdx.x;
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int y = blockIdx.y * blockDim.y + threadIdx.y;
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if (y < rows && x < cols)
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float w1 = weights1.ptr(y)[x];
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float w2 = weights2.ptr(y)[x];
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float sum_inv = 1.f / (w1 + w2 + 1e-5f);
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uchar4 p1 = ((const uchar4*)img1.ptr(y))[x];
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uchar4 p2 = ((const uchar4*)img2.ptr(y))[x];
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((uchar4*)result.ptr(y))[x] = make_uchar4(p1.x * w1 + p2.x * w2, p1.y * w1 + p2.y * w2,
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p1.z * w1 + p2.z * w2, p1.w * w1 + p2.w * w2);
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void blendLinearCaller8UC4(int rows, int cols, PtrStepb img1, PtrStepb img2, PtrStepf weights1, PtrStepf weights2, PtrStepb result, cudaStream_t stream)
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dim3 threads(16, 16);
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dim3 grid(divUp(cols, threads.x), divUp(rows, threads.y));
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blendLinearKernel8UC4<<<grid, threads, 0, stream>>>(rows, cols, img1, img2, weights1, weights2, result);
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cudaSafeCall( cudaGetLastError() );
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cudaSafeCall(cudaDeviceSynchronize());
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}}} // namespace cv { namespace cuda { namespace cudev
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#endif /* CUDA_DISABLER */