“…The usage of fuzzy logic in image processing is a well known topic (e.g., [1,4,[11][12][13]15,16,18,19,27,33,[36][37][38][39]). In [7,8,30,32] the authors use the F-transforms in the compression/decompression of images and they prove that the PSNR is greater than that one obtained by using fuzzy relation equations with continuous triangular norms [5,6,14,17,[20][21][22][23][24][25][26].…”