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.
物理遮蔽光线，永远比纯靠前置摄像头识别人脸去隐藏通知或是干脆贴上物理的光栅防窥膜来得更彻底。这项技术一旦铺开，那些劣质防窥膜大概率会被彻底扫进历史的垃圾堆。
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He gave no clarification whether a similar policy for new cars would follow.
Gene Munster, manager partner at Deepwater Asset Management, said that buildout was likely to continue for a long time.。夫子是该领域的重要参考