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72 lines
3.2 KiB
Common Lisp
72 lines
3.2 KiB
Common Lisp
/*M///////////////////////////////////////////////////////////////////////////////////////
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//
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// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
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//
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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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//
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//
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// License Agreement
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// For Open Source Computer Vision Library
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//
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// Copyright (C) 2013, OpenCV Foundation, all rights reserved.
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// Third party copyrights are property of their respective owners.
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//
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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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//
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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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//
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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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//
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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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//
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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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//
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//M*/
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__kernel void im2col(__global const T *im_src, int im_src_offset,
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int channels, int height_inp, int width_inp,
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int kernel_h, int kernel_w, int pad_h, int pad_w, int stride_h, int stride_w,
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int height_out, int width_out,
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__global T *im_col, int im_col_offset
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)
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{
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int index = get_global_id(0);
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if (index >= height_out * width_out * channels)
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return;
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int j_out = index % width_out;
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int i_out = (index / width_out) % height_out;
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int c_inp = (index / width_out) / height_out;
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int c_out = c_inp * kernel_h * kernel_w;
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int i_inp = i_out * stride_h - pad_h;
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int j_inp = j_out * stride_w - pad_w;
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im_src += (c_inp * height_inp + i_inp) * width_inp + j_inp + im_src_offset;
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im_col += (c_out * height_out + i_out) * width_out + j_out + im_col_offset;
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for (int ki = 0; ki < kernel_h; ++ki)
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for (int kj = 0; kj < kernel_w; ++kj) {
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int i = i_inp + ki;
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int j = j_inp + kj;
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*im_col = (i >= 0 && j >= 0 && i < height_inp && j < width_inp) ?
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im_src[ki * width_inp + kj] : 0;
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im_col += height_out * width_out;
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}
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}
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