But 82 pairs are pixel-identical
Two characters might have identical Unicode skeletons but render differently in specific fonts, or have different skeletons but render identically in a particular typeface. Detecting this requires rendering glyphs and comparing pixel output. No purely Unicode-data-based approach handles it, and UTS #39 does not attempt to.
，更多细节参见搜狗输入法2026
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In an earlier post, I listed font-rendering attacks as an explicit limitation:
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