how to check whether two matrices are identical in OpenCV

Question

I have two instances of cv::Mat : m1 and m2. They are of the same numeric type and sizes. Is there any function in OpenCV that returns whether the matrices are identical (ha

Answer 1

For multichannel images, you could use cv::Mat::reshape to create a single channel image without any extra overhead.

An update of Antonio's answer would be

bool areEqual(const cv::Mat& a, const cv::Mat& b)
{
    cv::Mat temp;
    cv::bitwise_xor(a,b,temp);
    return !(cv::countNonZero(temp.reshape(1)));
}