CV_TYPE_NAME_MAT 3510 modules/core/src/persistence.cpp     cvStartWriteStruct( fs, name, CV_NODE_MAP, CV_TYPE_NAME_MAT );
CV_TYPE_NAME_MAT 4804 modules/core/src/persistence.cpp CvType mat_type( CV_TYPE_NAME_MAT, icvIsMat, (CvReleaseFunc)cvReleaseMat,