EXIF

EXIF
EXchangeable Image File Format
By Janett Niendorf
Computational Photography (Project, Summer 2009) @TU Berlin
List of tags
metadata of the picture
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Additional information
ImageDescription Alf (TV-Series, USA 1986-1990) Paul Fusco
wearing Alf-Costume and Benji Gregory
CopyrightInformation --- IMPORTANT: To be used solely for coverage
of this specific motion picture/tv programme
Artist Cinetext Bildarchiv
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Embedded Thumbnails
- preview
-changes
Some image manipultion software fails to update the thumbnail.
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About the 'standard'
●
Uses existing specifications JPEG and TIFF
●
Not supported in JPEG2000, PNG or GIF
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Created by JEIDA
(Japan Electronic Industries Development Association)
which is no standardization institute
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Wide use by manufactors of digital cameras
●
Latest version 2.21 dated 2003
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Related 'standards'
Metadata
Exif
IPTC
(IIM)
XMP
Metadata Working Group
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Geocoding
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Compressed file structure
attribute information of
primary image
thumbnail information
- size of application segment 1 (APP1)
is restricted to 64kB
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Uncompressed
file structure
- uncompressed RGB data is recorded in
conformance with baseline TIFF Rev. 6.0
- Attribute information specific to Exif is recorded
using private tags reserved in TIFF for this standard
- private tags point to sets of this attribute information
(Exif IFD)
- uses offset pointers
- !Software may damge pointer-structure
Exif data – Janett Niendorf
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Disadvantages
●
Photo manipulation software fails to update the
embedded thumbnail
●
Image size higher with metadata
●
Global positioning vs. privacy
●
Time stamp says where u were
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Abbreviations
..that may confuse you while reading about Exif.
Exif
Exchangeable Image File Format
MWG
IPTC
XMP
JEIDA
IIM
Metadata Working Group
International Press Telecommunications Council
Extensible Metadata Platform
Japan Electronic Industries Development Association
Information Interchange Model
IFD
DCF
TIFF/EP
DSC
JPEG
JFIF
Image File Directory
Design rule for Camera File system
Tag Image File Format / Electronic Photography
Digital Still Camera
Joint Photographic Experts Group
JPEG File Interchange Format
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List of Sources
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Wikipedia http://en.wikipedia.org/wiki/Exif,
viewed 06.05.2009
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Exif 2.2 Specification http://www.exif.org/Exif2-2.pdf
Software
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IrfanView Exif Plugin (read Exif data, HEXview)
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ExifTool (commandline-tool for reading/writing Exif data)
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Picasa & Google Earth (geo-tagging)
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