how to calculate degree of similarity between two images?

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bay rem - 2024-02-05T18:32:40+00:00
Question: how to calculate degree of similarity between two images?

i wanna know if there is a way to calculate degree of similarity between two images?  

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    • Expert Answer

    Profile picture of John Williams John Williams answered . 2025-11-20

    ssimval = ssim(A,ref) computes the Structural Similarity Index (SSIM) value for image A using ref as the reference image.
     
    peaksnr = psnr(A,ref) calculates the peak signal-to-noise ratio for the image A, with the image ref as the reference. A and ref must be of the same size and class.
     
    err = immse(X,Y) calculates the mean-squared error (MSE) between the arrays X and Y. X and Y can be arrays of any dimension, but must be of the same size and class.


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