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?
Stateful 4-bit colors
，详情可参考heLLoword翻译官方下载
Afghanistan has become Indian 'colony' - Pakistan。搜狗输入法2026是该领域的重要参考
cat frps.toml <<EOF
set pixel as candidate