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FFT partial banding problem

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  #1  
Old 09-15-2010, 09:25 AM
skellington skellington is offline
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FFT partial banding problem

I've got an old picture that is on photographic silk paper, it has the honeycomb texture. I used the FFT plugin. It does a brilliant job of removing the pattern except for an area on the top and bottom of the picture which has retained the still has the pattern and some horizontal lines. I have experimented in removing the starbursts a few ways but can not figure out how to prevent this problem.

Any suggestions or insight as to why this is happening?


http://i242.photobucket.com/albums/f...on26/noFFT.jpg
http://i242.photobucket.com/albums/f...26/withFFT.jpg
http://i242.photobucket.com/albums/f...gton26/fft.jpg
http://i242.photobucket.com/albums/f...ftblackout.jpg
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  #2  
Old 09-15-2010, 09:50 AM
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chillin chillin is offline
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Re: FFT partial banding problem

Try to expend the canvas & then apply the FFT. It works for me (most of the time)
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File Type: jpg noFFT_chill.jpg (98.9 KB, 37 views)
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Old 09-15-2010, 10:13 AM
skellington skellington is offline
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Re: FFT partial banding problem

Thanks for the suggestion. I just tried it but it I still have the same problem.
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Old 09-15-2010, 11:01 PM
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chillin chillin is offline
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Re: FFT partial banding problem

Quote:
Originally Posted by skellington View Post
Thanks for the suggestion. I just tried it but it I still have the same problem.
You could also divide the pic into small pieces & use image analyzer, it gives better control.
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File Type: gif noFFT_chillin-FFT.gif (43.9 KB, 25 views)
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Old 10-15-2010, 04:10 AM
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Nezbitten Nezbitten is offline
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Re: FFT partial banding problem

I tried IA recently for a large image and it coped beautifully with an image of 6000 pixels wide. The limit on the FFT Photoshop plugin can be annoying as that works fairly well too. So if you need it large switch to IA.
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  #6  
Old 10-15-2010, 08:43 AM
skellington skellington is offline
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Re: FFT partial banding problem

IA? I don't think I am familiar, what is it?
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Old 10-15-2010, 09:08 AM
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mistermonday mistermonday is offline
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Re: FFT partial banding problem

IA stand for Image Analyzer. It is by Meesoft and there is a free version of it.
Regards, Murray
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Old 10-15-2010, 09:11 AM
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philbach philbach is offline
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Using Neat Image

Instead of using fft, I used Neat image which seemed to help. There are still several localized color problems in the image.
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  #9  
Old 10-15-2010, 11:20 AM
skellington skellington is offline
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Re: FFT partial banding problem

I already finished the image. I was able to use the FFT by sectioning off the image but this I had to do by trial and error with different sized sections until finally I got something that worked. It's still nice to know of other alternaties. I do find that the FFT plugin for photoshop crashes often even if the size is within its limitations. Thank for your time and information.
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