原文来自:http://blog.daimajiangxin.com.cn
search engine rankings to domain ratings, referring domains, and backlink，详情可参考同城约会
，这一点在91视频中也有详细论述
这些公司有一个共同点：它们没有在造更聪明的模型，它们在解决数据从混乱到有序的问题。，详情可参考51吃瓜
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.