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A comment on Making all your integers positive with zigzag encoding. Parent comment

Re:Making all your integers positive with zigzag encoding by bob1029 on Friday November 25, 2022 @05:52PM (#33747758)
Zigzag is a phase after DCT+quantization where you iterate through the resulting matrix in a particular order. Nothing to do with the DCT itself.

https://commons.wikimedia.org/wiki/File:JPEG_example_zigzag....

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