Good one but how do you measure compression loss in this case?

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Is there a MATLAB function for JPEG Compression attack on an image at a given quality factor?

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Do you know any MR image dataset?

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Eero P. Simoncelli

Dear Peter: see examples (both visual, and quantified in terms of PSNR and SSIM) at https://www.cns.nyu.edu/~lcv/iclr2017/

Sama Lenin Kumar Reddy

Structural Similarity Index (SSIM) is the one of the best method for measuring image quality.

Go through this link

https://www.mathworks.com/help/images/ref/ssim.html

Thuong Nguyen Canh

It worth to mention that we often use different IQA tools for color imaging such as FSIM

http://sse.tongji.edu.cn/linzhang/IQA/FSIM/FSIM.htm