Compute the Structural Similarity (SSIM) of two RGBA or two GREY images. "The resultant SSIM index is a decimal value between -1 and 1, where 1 indicates perfect similarity, 0 indicates no similarity, and -1 indicates perfect anti-correlation."
First image.
Second image.
SSIM options.
SSIM of the two images.
https://en.wikipedia.org/wiki/Structural_similarity
Compute the Structural Similarity (SSIM) of two RGBA or two GREY images. "The resultant SSIM index is a decimal value between -1 and 1, where 1 indicates perfect similarity, 0 indicates no similarity, and -1 indicates perfect anti-correlation."