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SSIM (Structural Similarity Index Measure) compares two images by evaluating luminance, contrast, and structural patterns across local windows. It returns a score from -1 to 1: 1.0 means the images are pixel-identical, 0 means no structural correlation, and negative values mean the images are anti-correlated (less alike than random noise). For glyph comparison, it answers the question: do these two rendered characters share the same visual structure?
，更多细节参见搜狗输入法2026
《人体生物监测质量保证规范》修订后主要有四方面变化。。搜狗输入法2026对此有专业解读
Что думаешь? Оцени!，这一点在服务器推荐中也有详细论述