Abonsoft Image Compare Command Line can help you to compare any type pictures with their differences highlighted. It also works well for images with different sizes.
Just give their align points, the command line programe will align the two picture automatically and compare them.
The compare result can be in mask mode in black and white, or highlight the different part with transparent background. It is very easy to use.
Compare two images pixel by pixel
Can set the compare tolerance ( 0~255 or 1%~100%)
Can output difference part based on image1, image2, or both of them
Compare for different type pictures
Compare for different size pictures
Can give align points to compare
Can give detailed comparison report
View the compare result in mask mode of black and white or with transparent background
Can save the compare result to an image file in popular image format