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Date Posted: 21:20:40 04/20/03 Sun
Author: Michel
Subject: Re: TIFF Sub Images
In reply to: glup 's message, "Re: TIFF Sub Images" on 04:40:37 04/19/03 Sat

Hi Glub,

No, this feature has not been integrated with Envision.

Best regards,


>>The TIFF format allows to assign to each Image in the
>>main TIFF IFD with the tag TIFFTAG_SUBIFD = 330 a sub
>>IFD, e.g. containing derivated images of the main
>>image, where the type is indicated by
>>thumbnail or FILETYPE_MASK for a mask).
>>I have understood how to read TIFFTAG_SUBIFD to
>>receive the subimage IFD file offset. The question is
>>how to load images from that "sub directory" in the
>>TIFF file.
>I have just read, that the Envision TIFF support is
>based on libtiff. libtiff provides the function
>TIFFSetSubDirectory(tiff, offset). I have not found
>this in Envision.

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