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Re: filmscanners: Vuescan - A few technical questions
In a message dated 3/3/2001 6:35:33 PM EST, jdn@bird9.com writes:
> 1. In the Color balance tab, what is the difference between "Neutral" and
> "Auto Levels?"
Neutral doesn't change the ratio of red to green to blue. Auto levels
uses the brightest point to determine the ratio.
> 2. Also in Color balance, does "White balance" assume that the lightest
> object in the image is white?
No, it doesn't.
> Can it be used if there are no white objects
> in the frame?
Yes.
> 3. When should Options/Long scan not be used.
I'd recommend never using it - multiple passes works better.
Lots of people asked me to add this option, but I don't think
it works very well because of charge bleeding from overexposed
pixels into nearby pixels.
> 4. How does Vuescan calibrate the scanner? When I pull down "calibrate"
> from the device menu, nothing seems to happen.
This is only useful on some scanners, notably the PhotoSmart,
Minolta SCSI scanners and Canon FS2700/2710,
Regards,
Ed Hamrick
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