At 12:36 PM 7/28/2003 +1200, Brian Swale wrote:
[snip]
I've just made my first CDROM stick-on label and I'm not happy with the
results
[snip]
The UBIX photocopier laboratory used a Konica (that's the in-house UBIX
copier brand) to produce the printed label.
What I noticed immediately was severe pixelation in the colour photocopier
image on the stick-on label
[snip]
To my surprise I have not been able to reproduce the pixelation that I
find so
offensive, including the pixelation of the text.
My suspicions comprise two possibilities:
1. The lab's printer has grossly inferior interpolation software for the
final ripping of the image; I used to work in DTP (that's Desktop
Publishing Program for you tyros) for a living, and the printer's software
(or the software of the DT program, if that program was controlling the
printer directly) made a huge difference, almost regardless of the quality
of the digital image. Either that, or the lab personnel in question never
bothered to make a test run and adjust as required. Good RIP software can
do wonders with printing, even with a relatively low-quality JPEG.
2. The actual JPEG image on your Web page that was used to make the label,
although almost the same file size as the BMP it was derived from, appears
to have much less "visually relevant" image info in it (lots of data but
little information, if you get my drift). I confirmed this by taking the
original image (the BMP) and converting it into a JPEG in Photoshop, and
then comparing the JPEG from your Web page directly with the JPEG I created
from the BMP. My JPEG is visually richer, and compares favourably with the
original BMP, even though it's only one-fifth the file size of the JPEG on
your Web page.
3. (I didn't mention this above). It's a combination of the two problems
stated above.
Hope this helps.
Garth
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