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February 2008

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2008.02.15 14:36 "bug? JPEGQUALITY seems not to be read correctly", by <jcupitt@gmail.com>

2008.02.15 14:57 "Re: bug? JPEGQUALITY seems not to be read correctly", by Ed Grissom

2008.02.15 15:02 "Re: bug? JPEGQUALITY seems not to be read correctly", by <jcupitt@gmail.com>

2008.02.15 15:14 "Re: bug? JPEGQUALITY seems not to be read correctly", by Ed Grissom

2008.02.18 10:44 "Re: bug? JPEGQUALITY seems not to be read correctly", by Gerben Vos

2008.02.18 12:29 "Re: bug? JPEGQUALITY seems not to be read correctly", by <jcupitt@gmail.com>

2008.02.18 13:12 "Re: bug? JPEGQUALITY seems not to be read correctly", by Joris Van Damme

2008.02.18 14:23 "Re: bug? JPEGQUALITY seems not to be read correctly", by Joris Van Damme

2008.02.15 17:51 "Re: bug? JPEGQUALITY seems not to be read correctly", by Bob Friesenhahn

2008.02.15 15:02 "Re: bug? JPEGQUALITY seems not to be read correctly", by <jcupitt@gmail.com>

On 15/02/2008, Grissom, Ed <ed.grissom@intergraph.com> wrote:
>  There is no place in the header for a "quality" setting.  This is not
>  something that is in the JPEG spec or the TIFF spec.  What is in both
>  specs is a quality table (q-table).  This q-table is generated from the
>  q-setting.
>
>  It is difficult to recreate the q-setting that was used to create a
>  q-table.

Ah OK, thanks. But tiff could have a tag in the header which hinted at
the Q setting which was used to make the table, couldn't it? It would
make the operation of things like tiffcp more predictable.

John