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????????????????????????????Ч??????￡??????????????????????????????????????????????????????????????????????????????????????н???????????????н?С????????????????????????????????????????????????е?????????????????????淴??????????????
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????????????????????????У? universal image quality index??UIQI????SSIM??VIF??FSI????????????????reference2?????????????
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????????? image super-resolution 8???????????super-resolution????????????

????IFC > NQM > WPSNR > MSSSIM > SSIM > UIQI > PSNR >VIF
???????????IFC
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????1??the IFC metric is designed to evaluate the loss of image information so that it extracts wavelet features with fo cus on high- frequency details rather than low-frequency comp onents. This me tric matches human p erception well as visual p erception is more sensitive to high-frequency details of SR images rather than low-frequency components.
????2??Second?? the IFC metric is develop ed based on natural scene statistics using the Gaussian scale mixtures [37] and the BSD200 dataset contains numerous such images.