f:\opencv\opencv\sources\modules\core\src\matrix.cpp:
flags = (_type & CV_MAT_TYPE_MASK) | MAGIC_VAL;
CV_MAT_TYPE_MASK: =8*4-1=31, 5bits
#define CV_MAT_TYPE_MASK (CV_DEPTH_MAX*CV_CN_MAX - 1)
MAGIC_VAL:
MAGIC_VAL = 0x42FF0000
_type:
#define CV_32SC1 CV_MAKETYPE(CV_32S,1)
#define CV_MAKETYPE(depth,cn) (CV_MAT_DEPTH(depth) + (((cn)-1) << CV_CN_SHIFT))
CV_32SC1 = CV_32S &7 | (1-1)<<3 =4
已知Mat，如何获取她的dewpth, channel?
f:\opencv\opencv\sources\modules\core\src\arithm.cpp:
int type1 = psrc1->type(), depth1 = CV_MAT_DEPTH(type1), cn = CV_MAT_CN(type1);