Photoshop Image Resources
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'''Photoshop Image Resources''' is a metadata format native to [[PSD]] files, but which is also sometimes used in [[TIFF]], [[JPEG]], and other image formats. | '''Photoshop Image Resources''' is a metadata format native to [[PSD]] files, but which is also sometimes used in [[TIFF]], [[JPEG]], and other image formats. | ||
| − | == Format == | + | == Format details == |
Photoshop Image Resources consists of a sequence of blocks, each with a numeric ''Resource ID'' indicating the type of data stored in the block. Each block also contains a name, but the name is often left empty. | Photoshop Image Resources consists of a sequence of blocks, each with a numeric ''Resource ID'' indicating the type of data stored in the block. Each block also contains a name, but the name is often left empty. | ||
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Apparently Photoshop data (at least in Mac formats) also makes use of the [[ANPA-1312]] format, a news-media industry markup format, for metadata storage. | Apparently Photoshop data (at least in Mac formats) also makes use of the [[ANPA-1312]] format, a news-media industry markup format, for metadata storage. | ||
| − | == Related | + | == Plug-in resources == |
| + | Custom application data ("plug-in resources") can be stored using resource IDs 4000–4999 (0x0FA0–0x1387). There might be more information about this somewhere in the [http://www.adobe.com/devnet/photoshop/sdk.html Photoshop SDK]. | ||
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| + | ''[TODO: How are these resources identified? 1000 ID numbers seems insufficient for global uniqueness. Some or all plug-in resources appear to begin with a [[FourCC]].]'' | ||
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| + | ''[TODO: Is there any documentation available about specific plug-in resource formats?]'' | ||
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| + | == Related formats == | ||
* In a [[TIFF]] file, tag 34377 contains Photoshop Image Resources. | * In a [[TIFF]] file, tag 34377 contains Photoshop Image Resources. | ||
Revision as of 18:11, 11 August 2016
Photoshop Image Resources is a metadata format native to PSD files, but which is also sometimes used in TIFF, JPEG, and other image formats.
Contents |
Format details
Photoshop Image Resources consists of a sequence of blocks, each with a numeric Resource ID indicating the type of data stored in the block. Each block also contains a name, but the name is often left empty.
Each block begins with ASCII characters "8BIM", a signature which appears in several Photoshop formats.
Not all Resource IDs are publicly documented.
Apparently Photoshop data (at least in Mac formats) also makes use of the ANPA-1312 format, a news-media industry markup format, for metadata storage.
Plug-in resources
Custom application data ("plug-in resources") can be stored using resource IDs 4000–4999 (0x0FA0–0x1387). There might be more information about this somewhere in the Photoshop SDK.
[TODO: How are these resources identified? 1000 ID numbers seems insufficient for global uniqueness. Some or all plug-in resources appear to begin with a FourCC.]
[TODO: Is there any documentation available about specific plug-in resource formats?]
Related formats
- In a TIFF file, tag 34377 contains Photoshop Image Resources.
- In a JPEG file, an APP13 marker with an identifier of "Photoshop 3.0" contains Photoshop Image Resources.
- Resource ID 0x0404 contains IPTC data.
- Resource ID 0x040c may contain a thumbnail in JPEG/JFIF format.
- Resource ID 0x040F contains an ICC profile.
- Resource ID 0x0422 contains Exif data.
- Resource ID 0x0424 contains XMP data.
Specifications
- Adobe Photoshop File Formats Specification
- See PSD for other versions.
