Instead of taking the nearest candidates to , we can look for a set of candidates whose centroid is close to . The N-convex algorithm works by finding the closest colour to a given target colour for iterations, where the target is first initialised to be equal to the input pixel. Every iteration the closest colour added to the candidate list, and the quantisation error between it and the original input pixel is added to the target.
从后向前扫描已排序部分，找到插入位置，元素后移腾出空间
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This is a complicated technical and social problem, with no single solution. We also have competing priorities for what is the most important problem with WebAssembly to fix first.。业内人士推荐夫子作为进阶阅读
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