Opencv compare two images c

1. How do I compare two images in OpenCV?
2. How do you compare the similarity of two images?

How do I compare two images in OpenCV?

To compare two images, we use the Mean Square Error (MSE) of the pixel values of the two images. Similar images will have less mean square error value. Using this method, we can compare two images having the same height, width and number of channels.

How do you compare the similarity of two images?

The similarity of the two images is detected using the package “imagehash”. If two images are identical or almost identical, the imagehash difference will be 0. Two images are more similar if the imagehash difference is closer to 0.