Tricking or ticking VueScan to include sprocket holes?
Old 01-09-2017   #1
johannielscom
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Tricking or ticking VueScan to include sprocket holes?

Small question, small answer (I hope).

I'm using a flatbed scanner and VueScan to scan all images of a roll of 35mm at once, as a sort of contact sheet.

The moment I select a single frame, VueScan nicely corrects for color. But when I include sprocket holes and in-between space, it does so too and all my images turn funky green, blue or what have you.

I found the box to tick to lock exposure, but no such thing for locking color..?

What box do I tick to stop it from correcting color? I haven't been able to find it... Or is there another trick to get what I want?
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Old 01-09-2017   #2
brbo
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Lock exposure, do another preview and you can then lock color.
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Old 01-09-2017   #3
Dante_Stella
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The option for "exposure lock" only matters when you are scanning different things repeatedly, and it's just looking for the film base color/density. I don't think that's going to help because you have a single "frame" (i.e., contact sheet) from which you are taking multiple crops.

Go to the Cropping menu and set "buffer" to 10%. That will set the area the program uses for autoexposure to a space that's 10% smaller than your frame+border. You might really have to crank that number up for sprockets.

You can alternatively use a "border" % to select the actual area of the picture and have the program collect an area around it (by percentage). This would not throw the AE. More challenging for sprockets, since they require a larger crop in one dimension.

Alternately, you can turn off AE altogether (setting color balance to "none"), but that could be a pain.

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Old 01-09-2017   #4
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Thanks brbo and Dante, I'll give that a try later today or tomorrow, when there's 35mm film on the flatbed again.

I got tired trying to figure it out and switched to scanning MF on my Imacon for now. Much more rewarding
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Old 01-09-2017   #5
brbo
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1. make preview, lock exposure to whatever you want (select unexposed part of the negative or some typical frame)
2. make another preview, now you will see that you have the option to also lock color
3. select entire scanner bed and scan or play with color settings so that most frames look acceptable

Not all frames will be perfect (or better, not even one frame will be perfect), but there is no better way to do this with one scan.
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Old 01-09-2017   #6
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Set the buffer to at least 15%
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Old 01-09-2017   #7
brbo
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Quote:
Originally Posted by Scapevision View Post
Set the buffer to at least 15%
Not gonna help one bit, since the sprocket holes will be even in the center of his scan. Please, read what he is trying to do.
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