Greyscale rendering is deliberate. Gupta et al. (2023, “GlyphNet”) found that greyscale outperforms colour for glyph comparison because extreme contrast preserves edge detail through resize. No image augmentation either: flipping or rotating characters creates unrealistic glyphs.
更重要的是，一旦贴上防窥膜，就像是戴上了紧箍的孙悟空一样没法取下来了——
，这一点在搜狗输入法2026中也有详细论述
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