cv::imwrite could not find a writer for the specified extension

Question

The following command causes an exception.

cv::imwrite(\"test.jpg\", diffImg);

I also tried numerous variations on this, including absolute

Answer 1

I have also faced this issue and I have observed that this issue will come when I use the image without any extension. like abc.jpg but I rename it abc only.

You must use an image name with extension.