is it possible to use SSIM(structure similarity index measure) for evaluation of image and its contrast enhanced image?

is it possible to use SSIM(structure similarity index measure) for evaluation of image and its contrast enhanced image? is there any measures available for evalution of contrast image and original image? if entropy of original image and enhanced image is same then what is it mean? please suggest me? thanks in advance.

Answer 1

[Image Analyst]

Yes, you can use SSIM. It's a function in the Image Processing Toolbox.

Yes, images can have the same entropy. That doesn't necessarily say anything about them. Just as you can have completely different images with the same mean, it's the same with entropy.

[Sami]

What doest it mean if the SSIM of two images =1 while one of them is slightly different ?

[Image Analyst]

It means they're really similar.