2006.11.24 10:23 "[Tiff] Windows HD Photo - any interest?", by Brad Hards

2006.11.24 16:02 "Re: [Tiff] Windows HD Photo - any interest?", by Andrey Kiselev

On Fri, Nov 24, 2006 at 09:23:24PM +1100, Brad Hards wrote:

Turns out it is really a TIFF-like format, with a unique codec and some special tags. The tags are described in one specification, known as the Feature specification. The codec is described in a different spec, known as the bitstream specification. They are both embedded in a Device Porting Kit (DPK), which you can find at: http://www.microsoft.com/whdc/xps/hdphotodpk.mspx

The codec itself is an interesting part. AFAIR it was claimed that their codec is very computationally inexpensive.

But the codec implementation supplied with this Kit is effectively non-free. It is not compatible neither with libtiff license terms nor with other popular free software licenses. I hope that it is possible to use documentation to do independent implementation:

"1. You may review these Materials only (a) as a reference to assist You in planning and designing Your product, service or technology ("Product") to interface with a Microsoft product, specification, service or technology ("Microsoft Product") as described in these Materials; and (b) to provide feedback on these Materials to Microsoft. All other rights are retained by Microsoft; this Agreement does not give You rights under any Microsoft patents."

Though, the patent issue remains.

Anyway, it is out of scope for libtiff at the moment.

Best regards,


Andrey V. Kiselev
ICQ# 26871517