I need help about the values psnr and mse obtained.

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Best range of desirable values for PSNR and MSE. Guys, good night.

I am creating an application for similarity test between two images using PSNR and MSE, however, need to know how to interpret the values and whether these values are acceptable. For this, I need to understand how to interpret the data PSNR and MSE. How do I know what the best desirable value for PSNR and MSE?

3 processed images in my program and found the following values for PSNR and MSE:

Image 1 PSNR 11.87 MSE 4223.802679

Image 2 PSNR 26.02 MSE 162.57

Image 3 MSE PSNR 29.95 65.72

How do I interpret these values and know which track is desirable for a good similarity between images using the MSE and PSNR.

Thank you.