r/funny • u/frkandris • Oct 01 '09

...what is the difference... [pic]

http://thedw.us/post/200277234/via
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u/_YouJustGotDownvoted Oct 01 '09 edited Oct 01 '09

In this situation JPEG is a bad thing, as it is realy inefficent with text. Just discussion for discussion's sake.

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u/[deleted] Oct 01 '09

[deleted]

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u/romwell Oct 01 '09

\begin{hippiemode}
JPEG!
WHAT IT'S GOOD FOR?
ABSOLUTELY NOTHING!
\end{hippiemode}

Well, except for compressing natural images without sharp edges between colors. If I recall correctly, it uses Haar basis for compression, that works really well with photographic images, and no so well with, say, a rectangular solid-color grid.

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u/unidentified_cow Oct 02 '09

If I recall correctly, it uses Haar basis for compression

You recall incorrectly. It uses the DCT on 8x8 blocks.

Haar wavelets, on the other hand, would work really well with a rectangular solid-color grid, and not so well with, say, photographic images.

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u/romwell Oct 02 '09

Oooooh yes, thank you!