两个矩阵，合并成一个矩阵

Mat mergeCols(Mat A, Mat B)
{
	//CV_ASSERT(A.cols == B.cols&&A.type() == B.type());
	int totalCols = A.cols + B.cols;

	Mat mergedDescriptors(A.rows, totalCols, A.type());
	Mat submat = mergedDescriptors.colRange(0, A.cols);
	A.copyTo(submat);
	submat = mergedDescriptors.colRange(A.cols, totalCols);
	B.copyTo(submat);
	return mergedDescriptors;
}

Mat mergeRows(Mat A, Mat B)
{
	//CV_ASSERT(A.cols == B.cols&&A.type() == B.type());
	int totalRows = A.rows + B.rows;

	Mat mergedDescriptors(totalRows, A.cols, A.type());
	Mat submat = mergedDescriptors.rowRange(0, A.rows);
	A.copyTo(submat);
	submat = mergedDescriptors.rowRange(A.rows, totalRows);
	B.copyTo(submat);
	return mergedDescriptors;
}