| /*M/////////////////////////////////////////////////////////////////////////////////////// | |
| // | |
| // IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING. | |
| // | |
| // By downloading, copying, installing or using the software you agree to this license. | |
| // If you do not agree to this license, do not download, install, | |
| // copy or use the software. | |
| // | |
| // | |
| // License Agreement | |
| // For Open Source Computer Vision Library | |
| // | |
| // Copyright (C) 2013, OpenCV Foundation, all rights reserved. | |
| // Third party copyrights are property of their respective owners. | |
| // | |
| // Redistribution and use in source and binary forms, with or without modification, | |
| // are permitted provided that the following conditions are met: | |
| // | |
| // * Redistribution's of source code must retain the above copyright notice, | |
| // this list of conditions and the following disclaimer. | |
| // | |
| // * Redistribution's in binary form must reproduce the above copyright notice, | |
| // this list of conditions and the following disclaimer in the documentation | |
| // and/or other materials provided with the distribution. | |
| // | |
| // * The name of the copyright holders may not be used to endorse or promote products | |
| // derived from this software without specific prior written permission. | |
| // | |
| // This software is provided by the copyright holders and contributors "as is" and | |
| // any express or implied warranties, including, but not limited to, the implied | |
| // warranties of merchantability and fitness for a particular purpose are disclaimed. | |
| // In no event shall the Intel Corporation or contributors be liable for any direct, | |
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| // the use of this software, even if advised of the possibility of such damage. | |
| // | |
| //M*/ | |
| __kernel void im2col(__global const T *im_src, int im_src_offset, | |
| int channels, int height_inp, int width_inp, | |
| int kernel_h, int kernel_w, int pad_h, int pad_w, int stride_h, int stride_w, | |
| int height_out, int width_out, | |
| __global T *im_col, int im_col_offset | |
| ) | |
| { | |
| int index = get_global_id(0); | |
| if (index >= height_out * width_out * channels) | |
| return; | |
| int j_out = index % width_out; | |
| int i_out = (index / width_out) % height_out; | |
| int c_inp = (index / width_out) / height_out; | |
| int c_out = c_inp * kernel_h * kernel_w; | |
| int i_inp = i_out * stride_h - pad_h; | |
| int j_inp = j_out * stride_w - pad_w; | |
| im_src += (c_inp * height_inp + i_inp) * width_inp + j_inp + im_src_offset; | |
| im_col += (c_out * height_out + i_out) * width_out + j_out + im_col_offset; | |
| for (int ki = 0; ki < kernel_h; ++ki) | |
| for (int kj = 0; kj < kernel_w; ++kj) { | |
| int i = i_inp + ki; | |
| int j = j_inp + kj; | |
| *im_col = (i >= 0 && j >= 0 && i < height_inp && j < width_inp) ? | |
| im_src[ki * width_inp + kj] : 0; | |
| im_col += height_out * width_out; | |
| } | |
| } | |