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Black and white

JPG: 26K GIF: 3.7K
JPG: 2.4K GIF: 620 bytes

Use a GIF. The compression is clearly better, and careful inspection will reveal that the borders between black and white are blurred in the JPEG images.

Since black-and-white pictures are really just two-color images, often with large areas of one color, the GIF format offers vastly superior quality and compression.

UVa CS Department of Computer Science
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