Hi,
Given that communication with Adobe in recent years has been similar to
expecting to receive a signal from a black hole from outside its event
horizon, up to now we have unilaterally attributed Compression=50002 to
mean JPEGXL in TIFF. Recently I saw that the DNG 1.7 specification has
registered value 52546 to mean JPEGXL in DNG
(https://helpx.adobe.com/content/dam/help/en/photoshop/pdf/DNG_Spec_1_7_0_0.pdf
, page 122). DNG is a derivative of the TIFF spec, so I guess/hope Adobe
makes sure that tag & tag value numbers don't collide between base TIFF
and DNG. So it would seem to me that switching to using the 52546 value
would be more future proof than our self-assigned 50002. If so, I'd do
the change in master to using 52546 on write side and accepting both
50002 and 52546 on read side, and backport read support for 52546 in 3.10
(this is mostly a GDAL-only topic for now given that the JPEGXL TIFF
codec is for the internal libtiff copy only)
Thoughts?
Even
--
http://www.spatialys.com
My software is free, but my time generally not.
Butcher of all kinds of standards, open or closed formats. At the end, this is
just about bytes.
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