- Pixelated edges with Vuescan's Long Exposure Pass
- Posted by BitBlit on June 2nd, 2004
I get a weird "edge" effect when I scan using long exposure pass on some old
fp3 negatives. It's like the merge doesn't quite blend high contrast edges
the way it should. It almost looks like a bad cut and paste job. Anyone else
have this happen? Solutions?
- Posted by degrub on June 2nd, 2004
Sounds more like the CCD elements are saturated and blooming.
submit a problem report to Ed. Sounds like the exposure time is too long
for that film.
Frank
BitBlit wrote:
- Posted by Ed Hamrick on June 2nd, 2004
"BitBlit" <bit@biteme.com> wrote:
What kind of scanner are you using? The CCD in some scanners
bloom from overexposed areas into nearby areas, causing this
effect.
Regards,
Ed Hamrick
- Posted by BitBlit on June 2nd, 2004
It's a Epson 3200. I switched to multi-pass from long exposure and the
problem went away. I thought using long exposure would help pull some more
detail from the extremes of the negative, the photo way high contrast
outside in sunlight, but I think it might have been just a poor choice on my
part to use it on this particular negative, which is quite dense. The
problem on the edges looked like a dark jagged fringe very apparent at 200%
magnification, a remnant from the long pass perhaps. Under what conditions
in your experience does long exposure work best?
"Ed Hamrick" <usenet@hamrick.com> wrote in message
news:c9jmnc$s95$1@ngspool-d02.news.aol.com...
- Posted by Erik Krause on June 2nd, 2004
Hello, BitBlit
you wrote...
I've seen it once in older scans.
Do the two scans separately by locking RGB exposure for the second scan
to 6 to 10 times the value of the normal one. Then use techniques like
described here: http://www.erik-krause.de/blending
--
Erik Krause
Digital contrast problems: http://www.erik-krause.de/contrast
