🚀 go-pugleaf

On 24 Dec 92 17:58:57 GMT <tyen@EDU.UTEXAS.CS> said:
>
>I was just talking with a friend of mine today, and he asked about the
>market viability for a package that scales down JPEG format 24-bit or
>32-bit pictures to 16-bit or 8-bit depths.
>
... loads deleted
>
>Could someone please confirm or refute the possibility of such a piece
>of software?
>
I don't see the point you/he are making.  As far as I know, JPEG
allows the decompression of images to any precision - spatial or colour.
Therefore any JPEG code used back-to-back allows n-bit
originals to be compressed and then decompressed to m-bit finals
without further code being written.

Certainly the point that there are other code systems around (most
image processing systems, including Utah Raster Toolkit) makes the route
via JPEG irrelevant, and the QUANTIZATION (as opposed to PRECISION
CHANGE) that is probably implied by going to 8-bit is as separate
problem, also attacked by the same systems.

Somebody tell me if I'm wrong.

Chris Osland
Atlas Video Facility
Rutherford Appleton Laboratory, UK

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