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.
Green: Advanced stats，详情可参考新收录的资料
，推荐阅读新收录的资料获取更多信息
41 - Context Providing Implicit Bindings。业内人士推荐新收录的资料作为进阶阅读
"Spaceflight is an incredible privilege," he said, "and sometimes it reminds us just how human we are."