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.
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，这一点在雷电模拟器官方版本下载中也有详细论述
void mergeSortRecursive(int arr[], int left, int right) {
From that list of 40 or 50 people, it was easy to find and trawl their social media. And that is when they found a photo of Lucy on Facebook with an adult who looked as though she was close to the girl - possibly a relative.