Vaughn,
> > Also, he said jpeg is a mathmatical representation of the image, not the
> > image itself. And it is the same quality as the original. So with no
> > compression selected, jpeg will be about 1/8 of a tiff file. Increase
> > compression, and the trade off with image quality happens quick. Resave, and
> > it recomputes and quality drops.
>
> Crap. Get better friends. ;-)
Agreed.
> All Jpeg images are compressed to a greater or lesser extent. Jpeg
> compression is lossy meaning that image data is discarded in the process
> of converting the image size. The trick with Jpeg is that human eye is
> unlikely to notice the missing data. But data has gone and there is no
> way to get it back.
Pretty much right.
> I haven't read the Jpeg spec, but was it originally intended for
> low-resolution work (ie, computer screen)?
>
> Would it be a generalisation to say that comsumer digital cameras store
> Jpeg images, while pro-quality produce Tiff or other non-compressed formats?
Hmmm...most consumer digital cameras allow you to save TIFF files
too however I'd be damn saving a single 6-7MB TIFF file on a measily
8, 16 or even 32MB Smartmedia/CompactFlash. I'd expect most people to
set their cameras to save to JPG, at least I set mine C2500L to SHQ
JPG.
Personally though, I wouldn't want to print anything out of my
C2500L (at least for framing and wall mounting - to distribute
to friends OTOH, is fine). Skin colour looks "pasty", etc.
> Vaughan
Sean
--
Sean Chan Sean.Chan@xxxxxxxx http://www.msdw.co.jp
EI/UNIX IT Dept. +81 3 5424-4318 (W) +81 3 5424-4399 (F)
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