1 /*M/////////////////////////////////////////////////////////////////////////////////////// 2 // 3 // IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING. 4 // 5 // By downloading, copying, installing or using the software you agree to this license. 6 // If you do not agree to this license, do not download, install, 7 // copy or use the software. 8 // 9 // 10 // License Agreement 11 // For Open Source Computer Vision Library 12 // 13 // Copyright (C) 2010-2012, Institute Of Software Chinese Academy Of Science, all rights reserved. 14 // Copyright (C) 2010-2012, Advanced Micro Devices, Inc., all rights reserved. 15 // Third party copyrights are property of their respective owners. 16 // 17 // @Authors 18 // Shengen Yan,yanshengen (at) gmail.com 19 // 20 // Redistribution and use in source and binary forms, with or without modification, 21 // are permitted provided that the following conditions are met: 22 // 23 // * Redistribution's of source code must retain the above copyright notice, 24 // this list of conditions and the following disclaimer. 25 // 26 // * Redistribution's in binary form must reproduce the above copyright notice, 27 // this list of conditions and the following disclaimer in the documentation 28 // and/or other materials provided with the distribution. 29 // 30 // * The name of the copyright holders may not be used to endorse or promote products 31 // derived from this software without specific prior written permission. 32 // 33 // This software is provided by the copyright holders and contributors as is and 34 // any express or implied warranties, including, but not limited to, the implied 35 // warranties of merchantability and fitness for a particular purpose are disclaimed. 36 // In no event shall the Intel Corporation or contributors be liable for any direct, 37 // indirect, incidental, special, exemplary, or consequential damages 38 // (including, but not limited to, procurement of substitute goods or services; 39 // loss of use, data, or profits; or business interruption) however caused 40 // and on any theory of liability, whether in contract, strict liability, 41 // or tort (including negligence or otherwise) arising in any way out of 42 // the use of this software, even if advised of the possibility of such damage. 43 // 44 //M*/ 45 46 __kernel void preCornerDetect(__global const uchar * Dxptr, int dx_step, int dx_offset, 47 __global const uchar * Dyptr, int dy_step, int dy_offset, 48 __global const uchar * D2xptr, int d2x_step, int d2x_offset, 49 __global const uchar * D2yptr, int d2y_step, int d2y_offset, 50 __global const uchar * Dxyptr, int dxy_step, int dxy_offset, 51 __global uchar * dstptr, int dst_step, int dst_offset, 52 int dst_rows, int dst_cols, float factor) 53 { 54 int x = get_global_id(0); 55 int y = get_global_id(1); 56 57 if (x < dst_cols && y < dst_rows) 58 { 59 int dx_index = mad24(dx_step, y, (int)sizeof(float) * x + dx_offset); 60 int dy_index = mad24(dy_step, y, (int)sizeof(float) * x + dy_offset); 61 int d2x_index = mad24(d2x_step, y, (int)sizeof(float) * x + d2x_offset); 62 int d2y_index = mad24(d2y_step, y, (int)sizeof(float) * x + d2y_offset); 63 int dxy_index = mad24(dxy_step, y, (int)sizeof(float) * x + dxy_offset); 64 int dst_index = mad24(dst_step, y, (int)sizeof(float) * x + dst_offset); 65 66 float dx = *(__global const float *)(Dxptr + dx_index); 67 float dy = *(__global const float *)(Dyptr + dy_index); 68 float d2x = *(__global const float *)(D2xptr + d2x_index); 69 float d2y = *(__global const float *)(D2yptr + d2y_index); 70 float dxy = *(__global const float *)(Dxyptr + dxy_index); 71 __global float * dst = (__global float *)(dstptr + dst_index); 72 73 dst[0] = factor * (dx*dx*d2y + dy*dy*d2x - 2*dx*dy*dxy); 74 } 75 } 76
