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.
В Финляндии предупредили об опасном шаге ЕС против России09:28
，这一点在WPS官方版本下载中也有详细论述
Courtesy of Apollo，详情可参考safew官方版本下载
第三章 违反治安管理的行为和处罚