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Old 05-04-2008, 03:21 PM   #1
iamback
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Default Scanning objects

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Originally Posted by Howard Allen View Post
All I can think of is that the original was held off the scanner glass at an angle--but ISTM that would also cause it to be all out of focus.
I've been doing experiments with scanning 3d-objects on a flatbed scanner. I was surprised there was quite a range within which an object is still reasonably sharp, and I imagine that range would vary by brand of scanner.

I imagine it's quite possible a distance of 1-2 centimeters off the surface of the glass plate could cause the kind of distortion here and still not be totally out of focus.

   
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Old 05-04-2008, 05:55 PM   #2
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Originally Posted by iamback View Post
I've been doing experiments with scanning 3d-objects on a flatbed scanner. I was surprised there was quite a range within which an object is still reasonably sharp, and I imagine that range would vary by brand of scanner.
I imagine it's quite possible a distance of 1-2 centimeters off the surface of the glass plate could cause the kind of distortion here and still not be totally out of focus.
If you want some inspiration, check out the breathtaking scans by Dawn Campbell.

You're right that the range of focus varies with the brand of scanner. With my Canon LiDE scanner, anything that isn't actually touching the glass is hopelessly out of focus. I've been meaning to try this on my old Linotype-Hell SCSI scanner, but can't find my round tuit.

   
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Old 05-04-2008, 11:40 PM   #3
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If you want some inspiration, check out the breathtaking scans by Dawn Campbell.
Ah, yes awesome work. I've been to that site before (though not recently).

Basically what I want to do is scan "little objects" I take home from my travels: packs of snacks, freebee toothbrushes and shampoo, admission tickets, even waterbottles and welcome scarves ... - the kind of small objects I don't want to just throw away because they're somehow typical for the location visited, or the trip to get there and back.

The hardest are the really glossy things - they easily cause "flares" that are totally overexposed. It takes a lot of experimentation to develop techniques for these types of things.

That project's on the backburner for now while I remodel my work space which is on the backburner while I do my balcony renovation which was on the backburner while I was working on my accessibility "masterclass', but on which I've just started again. Well, you get the idea...

   
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