How to measure quality between 2 images?

I work on the mosaic of images with two different method So I have two different results. Visually a method from the two gives good result. I want to compare the quality of both results and conclude one that gives good results

Answer 1

[Image Analyst]

Try psnr() and ssim(), both in the Image Processing Toolbox. See wikipedia for definitions.

[remos remos]

thank you for your reply in my case, the two images are the results, so I don't have a reference image how I can say, with the fonctions that you have provided me, this image is more good than the other

[Image Analyst]

What's your definition of good? Is a photo of a puppy "more good" than a photo of a kitten?

[remos remos]

I'm talking about mosaic reconstruction the one that offers a better reconstruction: less distortion, interfacts ... visually we can see it. however, what I'm looking for is quantitative quality measurements Thanks for your help

[Image Analyst]

See the "no reference" links here: https://en.wikipedia.org/wiki/Image_quality

[remos remos]

more details please thank you

[Image Analyst]

I don't have the details. I don't already have the code just ready to hand over to you. Really, I don't. The details can be found in the link. Did you drill down into any of the links?

[remos remos]

 Thank you very much

Answer 2

[remos remos]

thank you for your reply in my case, the two images are the results, so I don't have a reference image how I can say, with the fonctions that you have provided me, this image is more good than the other

[Image Analyst]

This is not an answer. Please post as a comment to my answer.