GNOME Bugzilla – Bug 325296
TIFF and Pyramidal Tiled TIFF
Last modified: 2018-05-24 11:41:18 UTC
Hi all, in TIFF specification there is an interesting feature already implemented in imagemagik and vips that is the possibility to save Tiled Pyramidal Tiff. I've tryed to do a patch, but I'm not able to do something working... if somebody can be interested... the tiff plugin already is able to read this format. Cheers, Denix
I simply want to clarify this request. A pyramidal TIFF stores decreased resolution copies of the image(s) at half, quarter, etc resolution (this would look like a pyramid if you stacked the images up). It is something of a replacement for interlacing if used during realtime loading and viewing, and also useful for viewing at different resolutions. There are two ways to implement such, depending on the number of main images in the TIFF file. Unfortunately the newest TIFF specs seem to be hard to find, if someone could post a link to them then we would have a much better chance of implementing this.
We're using libtiff, so http://www.remotesensing.org/libtiff/ would be a starting point.
IMO this depends on saving layered TIFF, as handled in bug #335975. Adding dependency.
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