Revision as of 15:55, 3 August 2023 edit 164.215.235.187 (talk) Formatting correction ← Previous edit		Revision as of 20:21, 3 November 2023 edit undo Quantling (talk \| contribs) Extended confirmed users, Pending changes reviewers, Rollbackers 5,337 edits The expansion of "TIFF" begins with "Tag" not "Tagged" Next edit →
Line 91: ==Technical== The Exif tag structure is borrowed from TIFF files. On several image specific properties, there is a large overlap between the tags defined in the [[~~Tagged~~Tag Image File Format\|TIFF]], Exif, [[Tag Image File Format / Electronic Photography\|TIFF/EP]], and [[Design rule for Camera File system\|DCF]] standards. For descriptive metadata, there is an overlap between Exif, [[IPTC Information Interchange Model]] and [[Extensible Metadata Platform\|XMP]] info, which also can be embedded in a JPEG file. The Metadata Working Group has guidelines on mapping tags between these standards.<ref name="mwg_guidance"/> When Exif is employed for [[JPEG]] files, the Exif data are stored in one of JPEG's defined utility ''Application Segments'', the APP1 (segment marker 0xFFE1), which in effect holds an entire TIFF file within. When Exif is employed in TIFF files (also when used as "an embedded TIFF file" mentioned earlier), the TIFF Private Tag 0x8769 defines a sub-Image File Directory (IFD) that holds the Exif specified TIFF Tags. In addition, Exif also defines a [[Global Positioning System]] sub-IFD using the TIFF Private Tag 0x8825, holding location information, and an "Interoperability IFD" specified within the Exif sub-IFD, using the Exif tag 0xA005.

Exif: Difference between revisions