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FFT black canvas on a baseball card

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  #1  
Old 01-31-2006, 10:18 AM
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JGeddes JGeddes is offline
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FFT black canvas on a baseball card

hello:

I am using the FFT RGB filter on a baseball card. I did the FFT RGB filter and got the static canvas screen as shown in the tutorial. But when I select the red channel by itself, I get an almost black canvas and no stars or center. I am working on the background layer only, everything has been flattened.

This did not occur the last time I used this filter. Can you give me a tip on what I may be doing wrong?

JGeddes
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Old 01-31-2006, 10:44 AM
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Hi JGeddes

Do baseball cards have texture?

You seem to be doing everything correctly. Even if there were no texture you should see a cross on a grey background
Could you post a sample?

Ken
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Old 01-31-2006, 11:58 AM
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JGeddes JGeddes is offline
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baseball cards

I scanned the card at a very high DPI and if I reduce the card to a small size I am able to get the stars. But trying to work with the large size image 15x19 @ 240 DPI produces a black canvas in the red channel.
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File Type: jpg BCard_WEB.jpg (87.3 KB, 21 views)
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Old 01-31-2006, 11:59 AM
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JGeddes JGeddes is offline
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Pattern in Card

This is the card pattern. hard to see it in the card at 100KB or less
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File Type: jpg pattern.jpg (64.0 KB, 14 views)
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Old 01-31-2006, 12:14 PM
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byRo byRo is offline
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Quote:
Originally Posted by JGeddes
the large size image 15x19 @ 240 DPI produces a black canvas in the red channel.
There's your answer. As you can see here , there is a limit on picture size of 3072 pixels. Your image is a bit outside.

If you scan @ 150 DPI, you'll be OK.

Is that really 15 inches? Or is it 1.5" @ 2400 DPI?

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Old 01-31-2006, 12:16 PM
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JGeddes JGeddes is offline
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Small File Produces Proper Effect

Scanning at 600 DPI allows me to get the desired effect.... The original was scanned at 3200 DPI and too large.
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Old 01-31-2006, 12:18 PM
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JGeddes JGeddes is offline
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Thanks for the Help!

Yes the image will be a 16x20 sketch so I wanted to start with a deep scan since the card is only 3x5. The 600 DPI will easily transfer to 16x20 with an expanded edging.

JGeddes
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Old 01-31-2006, 02:09 PM
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Cameraken Cameraken is offline
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Hi JGeddes

Thanks for posting a sample but Rô spotted the problem.

I have just run some tests on an image 4000x4000
With FFTrgb red channel is black.
Then I tried with FFThsl and that was the same. Black channel

Then I tried with Image Analyser and it worked. Stars working fine.

So the other way round this problem is to install IA available here

http://www.retouchpro.com/forums/software/7210-freeware-image-analyzer.html


Ken
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