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85 lines
3.0 KiB
Common Lisp
85 lines
3.0 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) 2010-2012, Multicoreware, Inc., all rights reserved.
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// Copyright (C) 2010-2012, Advanced Micro Devices, Inc., all rights reserved.
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// Third party copyrights are property of their respective owners.
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//
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// @Authors
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// Xiaopeng Fu, fuxiaopeng2222@163.com
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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 GpuMaterials 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 distanceToCenters(
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int label_step, int K,
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__global float *src,
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__global int *labels, int dims, int rows,
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__global float *centers,
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__global float *dists)
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{
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int gid = get_global_id(1);
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float dist, euDist, min;
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int minCentroid;
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if(gid >= rows)
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return;
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for(int i = 0 ; i < K; i++)
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{
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euDist = 0;
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for(int j = 0; j < dims; j++)
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{
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dist = (src[j + gid * dims]
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- centers[j + i * dims]);
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euDist += dist * dist;
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}
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if(i == 0)
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{
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min = euDist;
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minCentroid = 0;
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}
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else if(euDist < min)
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{
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min = euDist;
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minCentroid = i;
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}
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}
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dists[gid] = min;
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labels[label_step * gid] = minCentroid;
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}
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