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RGB[A] <-> XYZ

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This commit is contained in:
Ilya Lavrenov
2013-11-27 19:25:26 +04:00
parent 506c19616d
commit 65ee06eb2b
2 changed files with 64 additions and 41 deletions
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65
modules/imgproc/src/opencl/cvtcolor.cl
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@@ -345,7 +345,70 @@ __kernel void YCrCb2RGB(__global const uchar* src, int src_step, int src_offset,
}
}
///////////////////////////////////// RGB <-> XYZ //////////////////////////////////////
__kernel void RGB2XYZ(int cols, int rows, int src_step, int dst_step,
int bidx, __global const DATA_TYPE* src, __global DATA_TYPE* dst,
int src_offset, int dst_offset, __constant COEFF_TYPE * coeffs)
{
int dx = get_global_id(0);
int dy = get_global_id(1);
if (dy < rows && dx < cols)
{
dx <<= 2;
int src_idx = mad24(dy, src_step, src_offset + dx);
int dst_idx = mad24(dy, dst_step, dst_offset + dx);
DATA_TYPE r = src[src_idx], g = src[src_idx + 1], b = src[src_idx + 2];
#ifdef DEPTH_5
float x = r * coeffs[0] + g * coeffs[1] + b * coeffs[2];
float y = r * coeffs[3] + g * coeffs[4] + b * coeffs[5];
float z = r * coeffs[6] + g * coeffs[7] + b * coeffs[8];
#else
int x = CV_DESCALE(r * coeffs[0] + g * coeffs[1] + b * coeffs[2], xyz_shift);
int y = CV_DESCALE(r * coeffs[3] + g * coeffs[4] + b * coeffs[5], xyz_shift);
int z = CV_DESCALE(r * coeffs[6] + g * coeffs[7] + b * coeffs[8], xyz_shift);
#endif
dst[dst_idx] = SAT_CAST(x);
dst[dst_idx + 1] = SAT_CAST(y);
dst[dst_idx + 2] = SAT_CAST(z);
}
}
__kernel void XYZ2RGB(int cols, int rows, int src_step, int dst_step,
int bidx, __global const DATA_TYPE* src, __global DATA_TYPE* dst,
int src_offset, int dst_offset, __constant COEFF_TYPE * coeffs)
{
int dx = get_global_id(0);
int dy = get_global_id(1);
if (dy < rows && dx < cols)
{
dx <<= 2;
int src_idx = mad24(dy, src_step, src_offset + dx);
int dst_idx = mad24(dy, dst_step, dst_offset + dx);
DATA_TYPE x = src[src_idx], y = src[src_idx + 1], z = src[src_idx + 2];
#ifdef DEPTH_5
float b = x * coeffs[0] + y * coeffs[1] + z * coeffs[2];
float g = x * coeffs[3] + y * coeffs[4] + z * coeffs[5];
float r = x * coeffs[6] + y * coeffs[7] + z * coeffs[8];
#else
int b = CV_DESCALE(x * coeffs[0] + y * coeffs[1] + z * coeffs[2], xyz_shift);
int g = CV_DESCALE(x * coeffs[3] + y * coeffs[4] + z * coeffs[5], xyz_shift);
int r = CV_DESCALE(x * coeffs[6] + y * coeffs[7] + z * coeffs[8], xyz_shift);
#endif
dst[dst_idx] = SAT_CAST(b);
dst[dst_idx + 1] = SAT_CAST(g);
dst[dst_idx + 2] = SAT_CAST(r);
#if dcn == 4
dst[dst_idx + 3] = MAX_NUM;
#endif
}
}