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，这一点在夫子中也有详细论述
While this is immediately effective, the random perturbations introduce a disturbing texture that can obfuscate details in the original image. To counter this, we can make some smart choices on where and by how much to perturb our input image in an attempt to add some structure to our dither and preserve some of the lost detail.
Number (12): Everything in this space must add up to 12. The answer is 2-6, placed vertically; 6-1, placed vertically.