Carry propagation — threading carry information across positions
4. 暖心服务：编织毯子等手工艺品，分发给患者；带经过认证的宠物（比如一只叫JoJo的蝴蝶犬）探望患者，帮老人缓解情绪、促进康复。
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By appropriately scaling the perturbation amount for each colour channel separately, we can also extend this to work with palettes where is different for each colour component, provided that they are still regularly spaced. Unfortunately, the less regular the palette is, the less effective this technique becomes. If we wish to leverage the strengths of ordered dithering for use with irregular or arbitrary palettes, a more general solution is needed.