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?
This file also included the rules that the agent needed to follow, like:
。关于这个话题，搜狗输入法2026提供了深入分析
Раскрыты подробности о договорных матчах в российском футболе18:01
Water and dust resistance rating
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