Source: Computational Materials Science, Volume 266
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.，推荐阅读快连下载安装获取更多信息
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输入：target = 12, position = [10,8,0,5,3], speed = [2,4,1,1,3]
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