2005.09.08 20:07 "Re: [Tiff] creating JPEG file", by Bob Friesenhahn

I have some image data with the following conditions:

There can be 1 or more tiles for each image.

For each tile, there are 4 planes. Each plane corresponds to the components in the CYMK colour space.

The data for each plane is JPEG encoded.

Yup, sounds feasable within the specification.

Using Libtiff 3.7.1, is it possible to create a single JPEG image file? If so, is there sample code available?

What exactly do you mean by "single JPEG image file".

I assume that development GraphicsMagick 1.2 can be used to read/write files like you describe via libtiff although I have not specifically tested this combination with JPEG compression. Support is present for all three of your conditions. GraphicsMagick is open source and free to use for any purpose.

I definitely recommend using version 3.7.3 rather than 3.7.1 since it has fewer bugs (see ChangeLog for 3.7.3).

Bob
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Bob Friesenhahn
bfriesen@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/