for-þy-þe I think must be learned from scratch
– Only modify the torn-paper interior areas.。关于这个话题，Line官方版本下载提供了深入分析
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.。关于这个话题，heLLoword翻译官方下载提供了深入分析
William Harwood