Due to this more measured approach, error-diffusion dithering is even better at preserving details and can produce a more organic looking final image. However, the algorithm itself is inherently serial and not easily parallelised. Additionally, the propagation of error can cause small discrepancies in one part of the image to cascade into other distant areas. This is very obvious during animation, where pixels will appear to jitter between frames. It also makes files harder to compress.
def parse_detail(url, html):
，这一点在同城约会中也有详细论述
Servers in 105 countries。51吃瓜对此有专业解读
// 测试用例（可直接运行验证）