Chuck Westfall wrote (as quoted by Jason Doss):
> Canon Inc. hasn't indicated an answer to that question yet, but the file
> format for our digital cameras supports the ability to record orientation
> data and the current versions of ZoomBrowser EX and ImageBrowser have the
> ability to read that tag and adjust the orientation of the thumbnail
> display. These facts imply that future Canon digital cameras may incorporate
> an orientation switch, but it's too early to say when.
What Chuck is really saying here is that EXIF (a JPEG-based file format
used by almost all digital cameras, and described in JEIDA-1998-h2 IIRC)
supports a TIFF orientation IFD embedded in its APP1 marker. Generic JPEG
decoders are under no obligation to actually parse that marker or do
anything with it (the JPEG spec says that a decoder may skip any APPx
marker it doesn't recognize), and most don't. This is quite different from
actually storing a rotated image, in which case the decoder doesn't have
to do anything special...
-- Patrick
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