Mat 图片 与 unsigned char* 相互转换

Mat图片 转 unsigned char*

//单通道
unsigned char* in_pixels = matImg.data;
//3通道
//还没试

unsigned char* 转 Mat图片

unsigned char* in_pixels;

//单通道
img = Mat(height, width, CV_8U, (void*)in_pixels);
//3通道
img = Mat(height, width, CV_8UC3, (void*)in_pixels);