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Date Posted: 20:24:19 07/21/03 Mon
Author: Michel
Subject: Re: Corrupt Tiffs
In reply to: Mike Haiss 's message, "Corrupt Tiffs" on 16:32:36 07/21/03 Mon


Hi Mike,

This is most likely tiff files with JPEG compression. Envision uses the revised Tiff 6 specification, and windows imaging does not. You should find more info on this on www.libtiff.org.

It goes both ways, tiff (with jpeg compression) saved with Envision will not load in imaging for windows and vice versa.

To detect those files, just try to load them with a TTiffGraphic. If there is an exception, it is windows imaging files, and if it loaded properly and the TiffGraphic.Compression = tcJPEG, then it is the revised jpg compression.

Best regards,

Michel

>I am having a problem with corrupt Tiffs that will not
>load in Windows imaging. My problem is that I want
>to write a program in CB6 to find the corrupt images
>and list them. However the envision package will open
>them. Is there any tag (or anything) I can access in
>code that will tell me when the image is corrupt? In
>the envision package the corrupt area of the images
>has black lines and black blocks over it when it is
>displayed.
>Any help would be appreciated...

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