Uh-oh, I seem to have forgotten the link. So I'll say one more thing about it.
<http://www.moosemystic.net/Gallery/tech/Scan/GreenDoor/9-641_25wb.htm>
Only the first roll-over is PS. The rest are VueScan. Notice on the first VS
one how even with a profile, Auto levels
screws up the WB, just not as badly. A miss is as good as a mile in this.
I consider this a fault in VS. It continues to apply other adjustments even
with a profile selected. A profile created
with specific film type selected is different than one created with generic
film selected, especially with color neg
film. That's just wrong, in my book.
You can easily enough work around it, but it's not documented and deeply
non-intuitive (at least to me). I also think
when a profile is selected, all the auto WB options should not be available.
Moose
On 11/1/2010 3:08 AM, Moose wrote:
> ...
> Oh well, I guess it isn't quite done, so I'll stay awhile. Auto Levels on
> ANYTHING, camera, scanner, editor, etc., can't really know what is in the
> image. Sure, some P&Ss try to guess, and aren't bad, but they can't KNOW. If
> you use Auto Color on a subject that doesn't average out to neutral gray, it
> will screw it up.
>
> Green, you say? Green it is. Scroll down to the small roll-overs that show
> what auto color does to a green scene in PS and VueScan.
>
> I suggest you never use Auto levels or in fact anything other than Manual or
> Neutral in VueScan. In addition to general problems with auto settings, as
> above, any error in setting the crop area that happens to include film areas
> outside the actual image can throw the auto functions off, sometimes by a lot.
Moose
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