On Sat, Apr 08, 2000 at 01:24:53AM +0300, Tor Lillqvist <[EMAIL PROTECTED]> wrote:
> I have no idea what would be a good way to implement this, or how the
> user interface could look. Probably one would need to keep a bitmap of
> dirty pixel blocks (or whetever they are called), and when saving, if

I'd say for such a really jpeg-only thing, the best way would be to
enhance the jpeg save mechanism to first parse the existing file.  Seems
doable as well.

> the more important a pixel block is. Hmm, is this doable in the JPEG
> format at all?

Yes. But I doubt it would be "legal" (that is, even if legal I doubt
decoders would survive reading it ;)

> Of course, one could achieve something similar by
> simply blurring the unimportant parts before saving.

Probably with some kind of "jpeg-blur" that aims at reducing frequency
components suited for jpeg...

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