Check Image for Changes

I want to be notified if there is a visual change to an image. Thus far I have visualAssert set up. However, it just verifies whether or not the image is there. Is there any command available that will check whether or not the image has changed itself?

What kind of changes do you mean? Small pixel changes or large changes e. g. from dog image to cat image?

I’m not sure whether it’s considered small or large. I’d like to be notified if the picture is filled in. For an example a map changes color from grey to blue. I want it to work similiar to visual ping