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What is Dither?

GIFs have a 256-colors limit, so quantization is needed to reduce colors when you make a GIF file from a true-color image. However, after a color reduction, some colorful images have an unnatural gradation problem, and you can minimize this problem by dither processing.

Dither adds noises to the image to make it more natural. However, while results may vary by the image type or situation, sometimes turning off the dither option produces good results.

Sample image

Quantized 256 colors image without dither

Quantized 256 colors image with dither

200% resized images