uint8_t *buffer = (uint8_t *)[data mutableBytes];
A low threshold preserves detail (more leaf nodes, less compression). A high threshold merges aggressively (fewer leaves, more compression, but the image gets blocky). The grid overlay shows the quadtree structure: large cells in uniform areas, small cells where detail is preserved.
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甚至有网友留言“请删除这条消息，我们为你高兴，但我无法接受”。。关于这个话题，搜狗输入法2026提供了深入分析
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