"Tag Image File Format / Electronic Photography
" (TIFF/EP) is a digital image file format standard
12234-2, titled "Electronic still-picture imaging – Removable memory – Part 2: TIFF/EP image data format". This is different from the Tagged Image File Format
, which is a standard administered by Adobe
currently called "TIFF, Revision 6.0 Final – June 3, 1992".
The TIFF/EP standard is based on a subset of the Adobe TIFF
standard, and a subset of the JEITA Exif
standard, with some differences and extensions.
One of the uses of TIFF/EP is as a raw image format
. A characteristic of most digital cameras (but excluding those using the Foveon X3 sensor
or similar, hence especially Sigma
cameras) is that they use a color filter array
. Software processing a raw image format for such a camera needs information about the configuration of the color filter array, so that the raw image can identify separate data from the individual sites of the sensor. Ideally this information is held within the raw image file itself, and TIFF/EP uses the tags that begin "CFA", CFARepeatPatternDim and CFAPattern, which are only relevant for raw images.
This standard has not been adopted by most camera manufacturers – Exif/DCF
is the current industry standard file organisation system which uses the Exchangeable image file format
. However, TIFF/EP provided a basis for the raw image formats of a number of cameras. One example is Nikon
's NEF raw file format,... Read More