You look at a region of the image. If all the pixels are roughly the same color (below some threshold), you store the average color for the whole region as a single value. If the pixels vary too much, you split the region into four quadrants and try again.
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。关于这个话题，heLLoword翻译官方下载提供了深入分析
And this can spill over beyond the venue itself.
Comparison of the N-closest and N-convex algorithms using an 8-colour irregular palette with . Left to right: N-closest, N-convex.
这种软硬件结合的思路，与华为纯靠软件识别并停止通知的方案有着本质区别。三星的方案适用场景更广，也更加优雅。这项技术一旦落地落地普及，那些严重影响观感的防窥膜几乎可以被彻底淘汰了。