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?
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。体育直播是该领域的重要参考
// 复制数组（避免原数组被修改影响其他测试），推荐阅读搜狗输入法2026获取更多信息
“家乡太冷、偏远、小众，一年到头没啥人。”此前的他，自2016年大学毕业后，一直在外闯荡。