MATLAB: Is it possible perform RMSE and SSIM in different size image

different sizermsessim

Hi, I wanna obtain RMSE and SSIM in different size image cause the images I used cannot be equalized in size. I attached those images.

Best Answer

No, those measurements cannot be computed for images that are different sizes.
You would want to trim out the irrelevant borders and then imresize to have them match sizes. It might make sense to resize to a consistent size rather than to the larger or smaller size.