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Input/Output/Workflow Scanning, printing, color management, and discussing best practices for control and repeatability

Scanning Objects

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  #11  
Old 05-06-2002, 11:52 PM
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Well, let's see...decent focus up to about the 4" mark, which would be 2", which would be 1/3 of the length, which (keeping angles constant) would make for a field depth of 2/3" (Or would it? My head hurts now).

Math, anyone?

Regardless, it was deeper than I imagined. Now the question is: can you make it deeper on the same scanner?
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  #12  
Old 05-07-2002, 12:07 AM
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Just for fun I looked for links:

Here's one, and here's another. Here's my search results.
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  #13  
Old 05-07-2002, 12:22 AM
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Good links! I'm not sure if there is a way to increase the depth of field except on very high end flatbeds.

I have read a few articles that say most flatbeds are sharper and have the greatest depth of field at the center of the CCD.
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  #14  
Old 05-07-2002, 12:27 AM
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Oh yeah, I forgot one of my favorite object scanning links
(caution: can be vulgar)
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  #15  
Old 05-07-2002, 12:29 AM
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You did your math right Doug!
The break down would be as follows:

2/6 = x/2
2x2 = 6x
4 = 6x
4/6 = 2x
2/3 = x

2/3" is the field of depth.
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  #16  
Old 05-07-2002, 12:36 AM
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Doug - I remember seeing that site! Poor cats... If I tried that with my cat, I would end up in the hospital with severe lacerations.

Lisa - That makes me feel bad that I can't even remember basic math!
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  #17  
Old 05-07-2002, 12:38 AM
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That's OK Greg, my husband who has his Doctorate in electrical engineering was reading over my should and said - Yup, Doug's right. Math was not my best subject.

Lisa
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  #18  
Old 05-07-2002, 12:41 AM
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OK Doug,

That's just about the weirdest link I've seen... and I've seen a few weird ones in my time - LOL

Lisa
Meeeowwww
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  #19  
Old 05-07-2002, 07:39 PM
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Well, I did not manage to get the cat scanned today ...but I did find a interesting feather. I believe it's a hawk feather. Anyway, I figured it would make a good object to scan due to the complexity and detail.

I have to say, I was pretty amazed by the scan! I placed the feather on the glass and put a shallow cardboard box with bright white paper lining the inside. I like the look this gives and I think having some of the scanner light reflect back down helps bring out detail in delicate or translucent objects.

The scan was done at 1200 ppi. This really gives a good idea of just how sharp even a fairly inexpensive flatbed scanner can be.
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File Type: jpg feather.jpg (65.6 KB, 41 views)
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  #20  
Old 05-07-2002, 08:08 PM
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Wow

That is really amazing. Now I have to start fooling around with scanner boxes. Thanks for the info. Greg.

Jerry
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