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，服务器推荐提供了深入分析
Then use it to build an APK package:
他们的工作，全是非医疗类的辅助服务，却精准戳中了医院和患者的需求：