1994.12.16 07:41 "Re: TIFF File Naming Conventions/Standards?", by Karsten Spang
The problem with multiple images for TIFF is that the format was designed for a single image. The name says it all: the I stands for Image instead of document, image group, etc.
When there are multiple images in a single file, the standard is clear that they are variations of a single image. Only the first one must be read by a compliant TIFF reader.
That really depends on the subfile type of the IFD. The spec:
NewSubfileType (254)
...
Bit 1 is 1 if the image is a single page of a multi-page image (See the
PageNumber field description.)...
...
PageNumber (297)
...
This field is used to specify page numbers of a multiple page (e.g.
facsimile) document...
That is all you need to put multiple images in a single TIFF file. Any reader that handles multiple pages ought to be able to read such a TIFF file.
It is quite another topic how you update a single page of such a document...
Karsten
--------------------------------------------------------------------------------
E-mail: krs@kampsax.dk Karsten Spang
Phone: +45 36 39 07 88 Kampsax Data
Fax: +45 36 77 03 01 P.O. Box 1142
DK-2650 Hvidovre
Denmark