Фото: Jacek Marczewski/Agencja Wyborcz / Reuters
DagsHub (What is DagsHub?)，详情可参考爱思助手下载最新版本
，这一点在同城约会中也有详细论述
h-next_free = 0;，更多细节参见快连下载安装
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.