P3D Re: Scanned Stereo pair manipulation software...

[Dylan The Hippy Wabbit <spacey@xxxxxxxxxxxxx>]

Hi All,

Dan Shelley wrote:-

>6 - Save in your output file type of choice. For this example, I would
>save as an uncompressed JPG.

Oh dear, we've been here before.  I'll try to be brief, even though Dr T
is away.  ;-)

There is no such animal as an uncompressed JPG.  I know the compression
setting control often reads 0-99, but it's just an arbitrary number.
You're not meant to take it literally.  You might mean "Set the
compression to it's minimum."  If you do you are probably throwing the
baby out with the bath water.  A moderate compression setting will save
quite a bit of space (and web server bandwidth) without having any visible
effect.

I'd advise anyone to suck it and see.  Increasing the compression setting 
from 0 to 10-15 will make a dramatic difference to the file size, and
probably none *whatsoever* to the decoded image.  I usually reopen a file
in a seperate window to see if it's been affected.  If so I can go back to
the original, and save again under a lower compression setting.  Just
don't save from the new copy, since the losses will accumulate.  I
generally use a compression setting of 30 without any significant
artifacts.

Hope that clears things a bit.

Dave Spacey

______________________________________________________________________________

Walk tall, walk straight,
Spit the world right in the eye.

-Kevin Godley and Lol Creme


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