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Date: Tue, 23 Sep 2008 21:14:23 -0400
From: Phillip Crews <pcrews@cerious.com>
Organization: Cerious Software Inc.
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To: "Rick Cone,Secure Payment Systems" <rcone@securepaymentsystems.com>,
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Subject: Re: [Tiff] TIFF Image Quality Question
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Rick Cone,Secure Payment Systems wrote:
> We have an issue with some TIFF images that we can't display with a 
> normal Windows image viewer.
>  
> For some reason the image is malformed or unstructured. 
>  
> Tiffinfo returns values that appear normal however (tags, etc.).
>  
> Is there any way to know if an image is all right from a display 
> standpoint using some libtiff utility?
>  
> Also, is there some way to know if an image all white, or all black, 
> using some libtiff utility?
>
If all white or all black images are what you are commonly seeing in the 
viewer, you may have images tagged as indexed that are actually 
grayscale, or for which the palette has been encoded incorrectly, or is 
simply missing. These would be relatively easy things to check for.

If you would make some sample images available for download, I'm sure 
people would be able to help more, and perhaps even provide a utility to 
fix them.

If they are not images you can make public, feel free to email me 
privately and I'll let you know what I can tell about them.

- Phillip

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