Mat 数据类型保存为二进制文件

// Write matrix to binary file
bool Objectness::matWrite(CStr& filename, CMat& _M){
	Mat M;
	_M.copyTo(M);
	FILE* file = fopen(_S(filename), "wb");
	if (file == NULL || M.empty())
		return false;
	fwrite("CmMat", sizeof(char), 5, file);
	int headData[3] = {M.cols, M.rows, M.type()};
	fwrite(headData, sizeof(int), 3, file);
	fwrite(M.data, sizeof(char), M.step * M.rows, file);
	fclose(file);
	return true;
}

// Read matrix from binary file
bool Objectness::matRead(const string& filename, Mat& _M){
	FILE* f = fopen(_S(filename), "rb");
	if (f == NULL)
		return false;
	char buf[8];
	int pre = fread(buf,sizeof(char), 5, f);
	if (strncmp(buf, "CmMat", 5) != 0)	{
		printf("Invalidate CvMat data file %s\n", _S(filename));
		return false;
	}
	int headData[3]; // Width, height, type
	fread(headData, sizeof(int), 3, f);
	Mat M(headData[1], headData[0], headData[2]);
	fread(M.data, sizeof(char), M.step * M.rows, f);
	fclose(f);
	M.copyTo(_M);
	return true;
}