RGB[A] <-> XYZ

modules/imgproc/src/opencl/cvtcolor.cl

@@ -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
+    }
+}
 
 
 

modules/ocl/src/opencl/cvt_color.cl

@@ -91,46 +91,6 @@ enum
     BLOCK_SIZE = 256
 };
 
-
-__constant float c_YCrCb2RGBCoeffs_f[4] = { 1.403f, -0.714f, -0.344f, 1.773f };
-__constant int   c_YCrCb2RGBCoeffs_i[4] = { 22987, -11698, -5636, 29049 };
-
-__kernel void YCrCb2RGB(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)
-{
-    int x = get_global_id(0);
-    int y = get_global_id(1);
-
-    if (y < rows && x < cols)
-    {
-        x <<= 2;
-        int src_idx = mad24(y, src_step, src_offset + x);
-        int dst_idx = mad24(y, dst_step, dst_offset + x);
-
-        DATA_TYPE ycrcb[] = { src[src_idx], src[src_idx + 1], src[src_idx + 2] };
-
-#ifdef DEPTH_5
-        __constant float * coeff = c_YCrCb2RGBCoeffs_f;
-        float r = ycrcb[0] + coeff[0] * (ycrcb[1] - HALF_MAX);
-        float g = ycrcb[0] + coeff[1] * (ycrcb[1] - HALF_MAX) + coeff[2] * (ycrcb[2] - HALF_MAX);
-        float b = ycrcb[0] + coeff[3] * (ycrcb[2] - HALF_MAX);
-#else
-        __constant int * coeff = c_YCrCb2RGBCoeffs_i;
-        int r = ycrcb[0] + CV_DESCALE(coeff[0] * (ycrcb[1] - HALF_MAX), yuv_shift);
-        int g = ycrcb[0] + CV_DESCALE(coeff[1] * (ycrcb[1] - HALF_MAX) + coeff[2] * (ycrcb[2] - HALF_MAX), yuv_shift);
-        int b = ycrcb[0] + CV_DESCALE(coeff[3] * (ycrcb[2] - HALF_MAX), yuv_shift);
-#endif
-
-        dst[dst_idx + (bidx^2)] = SAT_CAST(r);
-        dst[dst_idx + 1] = SAT_CAST(g);
-        dst[dst_idx + bidx] = SAT_CAST(b);
-#if dcn == 4
-        dst[dst_idx + 3] = MAX_NUM;
-#endif
-    }
-}
-
 ///////////////////////////////////// RGB <-> XYZ //////////////////////////////////////
 
 __kernel void RGB2XYZ(int cols, int rows, int src_step, int dst_step,