中文说明：图像的评价标准有熵、加权峰值信噪比、加权结构相似度、结构相似度、交叉熵、空间频率 这些都有是比较常用的判断标准
English Description：
Image evaluation criteria include entropy, weighted peak signal-to-noise ratio, weighted structure similarity, structure similarity, cross entropy and spatial frequency, which are commonly used