2005.07.25 10:26 "[Tiff] XResolution/YResolution Tags", by

Hi

My question is quite simple: are XResolution, YResolution and ResolutionUnit tags manfatory in a TIFF image?

It seems to be masked as "required" in the specification and no default values are indicated for the XResolution/YResolution tags.

However, i've read in several documents that these data are optionnals...

Where is the truth?

Gérald CLETTE