opencv ocl_morphologyEx
static bool ocl_morphologyEx(InputArray _src, OutputArray _dst, int op, InputArray kernel, Point anchor, int iterations, int borderType, const Scalar& borderValue) { _dst.createSameSize(_src, _src.type()); bool submat = _dst.isSubmatrix(); UMat temp; _OutputArray _temp = submat ? _dst : _OutputArray(temp); switch( op ) { case MORPH_ERODE: if (!ocl_morphOp( _src, _dst, kernel, anchor, iterations, MORPH_ERODE, borderType, borderValue )) return false; break; case MORPH_DILATE: if (!ocl_morphOp( _src, _dst, kernel, anchor, iterations, MORPH_DILATE, borderType, borderValue )) return false; break; case MORPH_OPEN: if (!ocl_morphOp( _src, _temp, kernel, anchor, iterations, MORPH_ERODE, borderType, borderValue )) return false; if (!ocl_morphOp( _temp, _dst, kernel, anchor, iterations, MORPH_DILATE, borderType, borderValue )) return false; break; case MORPH_CLOSE: if (!ocl_morphOp( _src, _temp, kernel, anchor, iterations, MORPH_DILATE, borderType, borderValue )) return false; if (!ocl_morphOp( _temp, _dst, kernel, anchor, iterations, MORPH_ERODE, borderType, borderValue )) return false; break; case MORPH_GRADIENT: if (!ocl_morphOp( _src, temp, kernel, anchor, iterations, MORPH_ERODE, borderType, borderValue )) return false; if (!ocl_morphOp( _src, _dst, kernel, anchor, iterations, MORPH_DILATE, borderType, borderValue, MORPH_GRADIENT, temp )) return false; break; case MORPH_TOPHAT: if (!ocl_morphOp( _src, _temp, kernel, anchor, iterations, MORPH_ERODE, borderType, borderValue )) return false; if (!ocl_morphOp( _temp, _dst, kernel, anchor, iterations, MORPH_DILATE, borderType, borderValue, MORPH_TOPHAT, _src )) return false; break; case MORPH_BLACKHAT: if (!ocl_morphOp( _src, _temp, kernel, anchor, iterations, MORPH_DILATE, borderType, borderValue )) return false; if (!ocl_morphOp( _temp, _dst, kernel, anchor, iterations, MORPH_ERODE, borderType, borderValue, MORPH_BLACKHAT, _src )) return false; break; default: CV_Error( CV_StsBadArg, "unknown morphological operation" ); } return true; }
代码参考：opencv3_4_1opencv-3.4.1modulesimgprocsrcmorph.cpp
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