gftt.cl 5.8 KB
Newer Older
wester committed
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161
/*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) 2010-2012, Institute Of Software Chinese Academy Of Science, all rights reserved.
// Copyright (C) 2010-2012, Advanced Micro Devices, Inc., all rights reserved.
// Third party copyrights are property of their respective owners.
//
// @Authors
//    Zhang Ying, zhangying913@gmail.com
//
// 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,
// indirect, incidental, special, exemplary, or consequential damages
// (including, but not limited to, procurement of substitute goods or services;
// loss of use, data, or profits; or business interruption) however caused
// and on any theory of liability, whether in contract, strict liability,
// or tort (including negligence or otherwise) arising in any way out of
// the use of this software, even if advised of the possibility of such damage.
//
//M*/

#ifdef OP_MAX_EIGEN_VAL

__kernel void maxEigenVal(__global const uchar * srcptr, int src_step, int src_offset, int cols,
                          int total, __global uchar * dstptr
#ifdef HAVE_MASK
                          , __global const uchar * maskptr, int mask_step, int mask_offset
#endif
                          )
{
    int lid = get_local_id(0);
    int gid = get_group_id(0);
    int  id = get_global_id(0);

    __local float localmem_max[WGS2_ALIGNED];
    float maxval = -FLT_MAX;

    for (int grain = groupnum * WGS; id < total; id += grain)
    {
        int src_index = mad24(id / cols, src_step, mad24((id % cols), (int)sizeof(float), src_offset));
#ifdef HAVE_MASK
        int mask_index = mad24(id / cols, mask_step, id % cols + mask_offset);
        if (maskptr[mask_index])
#endif
            maxval = max(maxval, *(__global const float *)(srcptr + src_index));
    }

    if (lid < WGS2_ALIGNED)
        localmem_max[lid] = maxval;
    barrier(CLK_LOCAL_MEM_FENCE);

    if (lid >= WGS2_ALIGNED && total >= WGS2_ALIGNED)
        localmem_max[lid - WGS2_ALIGNED] = max(maxval, localmem_max[lid - WGS2_ALIGNED]);
    barrier(CLK_LOCAL_MEM_FENCE);

    for (int lsize = WGS2_ALIGNED >> 1; lsize > 0; lsize >>= 1)
    {
        if (lid < lsize)
        {
           int lid2 = lsize + lid;
           localmem_max[lid] = max(localmem_max[lid], localmem_max[lid2]);
        }
        barrier(CLK_LOCAL_MEM_FENCE);
    }

    if (lid == 0)
        *(__global float *)(dstptr + (int)sizeof(float) * gid) = localmem_max[0];
}

__kernel void maxEigenValTask(__global float * dst, float qualityLevel,
                              __global int * cornersptr)
{
    float maxval = -FLT_MAX;

    #pragma unroll
    for (int x = 0; x < groupnum; ++x)
        maxval = max(maxval, dst[x]);

    dst[0] = maxval * qualityLevel;
    cornersptr[0] = 0;
}

#elif OP_FIND_CORNERS

#define GET_SRC_32F(_y, _x) *(__global const float *)(eigptr + (_y) * eig_step + (_x) * (int)sizeof(float) )

__kernel void findCorners(__global const uchar * eigptr, int eig_step, int eig_offset,
#ifdef HAVE_MASK
                          __global const uchar * mask, int mask_step, int mask_offset,
#endif
                          __global uchar * cornersptr, int rows, int cols,
                          __constant float * threshold, int max_corners)
{
    int x = get_global_id(0);
    int y = get_global_id(1);

    __global int* counter = (__global int*) cornersptr;
    __global float2 * corners = (__global float2 *)(cornersptr + (int)sizeof(float2));

    if (y < rows && x < cols
#ifdef HAVE_MASK
            && mask[mad24(y, mask_step, x + mask_offset)]
#endif
        )
    {
        ++x, ++y;
        float val = GET_SRC_32F(y, x);

        if (val > threshold[0])
        {
            float maxVal = val;
            maxVal = max(GET_SRC_32F(y - 1, x - 1), maxVal);
            maxVal = max(GET_SRC_32F(y - 1, x    ), maxVal);
            maxVal = max(GET_SRC_32F(y - 1, x + 1), maxVal);

            maxVal = max(GET_SRC_32F(y    , x - 1), maxVal);
            maxVal = max(GET_SRC_32F(y    , x + 1), maxVal);

            maxVal = max(GET_SRC_32F(y + 1, x - 1), maxVal);
            maxVal = max(GET_SRC_32F(y + 1, x    ), maxVal);
            maxVal = max(GET_SRC_32F(y + 1, x + 1), maxVal);

            if (val == maxVal)
            {
                int ind = atomic_inc(counter);
                if (ind < max_corners)
                {
                    // pack and store eigenvalue and its coordinates
                    corners[ind].x = val;
                    corners[ind].y = as_float(y | (x << 16));
                }
            }
        }
    }
}

#endif