2008.02.15 15:02 "Re: [Tiff] bug? JPEGQUALITY seems not to be read correctly", by John
On 15/02/2008, Grissom, Ed <firstname.lastname@example.org> 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.