Tag Image File Format / Electronic Photography
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| Filename extension | .tiff, .tif |
|---|---|
| Developed by | International Organization for Standardization |
| Type of format | Image file formats |
| Container for | Metadata |
| Extended from | TIFF and Exif |
| Extended to | Digital Negative Specification |
"Tag Image File Format / Electronic Photography" (TIFF/EP) is a digital image file format standard – ISO 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.
This standard has not been adopted by most camera manufacturers – DCF is the current industry standard file organisation system which uses the Exchangeable image file format.
Contents |
[edit] New Tags
The following new tags are defined in the TIFF/EP standard, all to be placed in the first TIFF Image File Directory (IFD)
| TIFF/EP Tag# | Tag Name |
|---|---|
| 330 | SubIFDs |
| 347 | JPEGTables |
| 33421 | CFARepeatPatternDim |
| 33423 | BatteryLevel |
| 33723 | IPTC/NAA |
| 34675 | InterColorProfile |
| 34857 | Interlace |
| 34858 | TimeZoneOffset |
| 34859 | SelfTimerMode |
| 37389 | Noise |
| 37393 | ImageNumber |
| 37394 | SecurityClassification |
| 37395 | ImageHistory |
| 37398 | TIFF/EPStandardID |
[edit] Differences from TIFF and Exif
There are no major departures by the TIFF/EP standard from the TIFF standard, except that many of the TIFF tags are ignored.
The TIFF/EP standard does however have a few notable differences from the Exif standards:
- All tags used by TIFF/EP which are defined by the Exif standard to reside within the Exif Sub-IFD now reside directly under the first (main) TIFF IFD.
- The Exif IFD Sub-IFD, Interoperability Sub-IFD and the MakerNote Tag have all been omitted.
- Unlike the TIFF 6.0 standard, the TIFF/EP standard defines a method of dealing with thumbnail images. This however is different from the method that is used in the Exif standard.
- Several tags defined by the Exif standard have been re-defined in the TIFF/EP standard – see table below.
| TIFF/EP Tag# | Tag Name | Exif Tag# |
|---|---|---|
| 37387 | FlashEnergy | 41483 |
| 37388 | SpatialFrequencyResponse | 41484 |
| 37390 | FocalPlaneXResolution | 41486 |
| 37391 | FocalPlaneYResolution | 41487 |
| 37392 | FocalPlaneResolutionUnit | 41488 |
| 37396 | SubjectLocation | 41492 |
| 37397 | ExposureIndex | 41493 |
| 37399 | SensingMethod | 41495 |
| 33422 | CFAPattern | 41730 |
[edit] See also
- International Organization for Standardization
- Tagged Image File Format
- Exchangeable image file format
- List of ISO standards
- DCF
