Wbmp format, Metadata and notes, About metadata – Adobe Photoshop CS4 User Manual
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USING PHOTOSHOP CS4
Saving and exporting images
Last updated 1/10/2010
In Photoshop, TIFF image files have a bit depth of 8, 16, or 32 bits per channel. You can save high dynamic range
images as 32-bits-per-channel TIFF files.
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WBMP format
WBMP format is the standard format for optimizing images for mobile devices, such as cell phones. WBMP supports
1-bit color, which means that WBMP images contain only black and white pixels.
Metadata and notes
About metadata
Metadata is a set of standardized information about a file, such as author name, resolution, color space, copyright, and
keywords applied to it. For example, most digital cameras attach some basic information to an image file, such as
height, width, file format, and time the image was taken. You can use metadata to streamline your workflow and
organize your files.
About the XMP standard
Metadata information is stored using the Extensible Metadata Platform (XMP) standard, on which Adobe Bridge,
Adobe Illustrator, Adobe InDesign, and Adobe Photoshop are built. Adjustments made to images with Photoshop®
Camera Raw are stored as XMP metadata. XMP is built on XML, and in most cases the metadata is stored in the file.
If it isn’t possible to store the information in the file, metadata is stored in a separate file called a sidecar file. XMP
facilitates the exchange of metadata between Adobe applications and across publishing workflows. For example, you
can save metadata from one file as a template, and then import the metadata into other files.
Metadata that is stored in other formats, such as Exif, IPTC (IIM), GPS, and TIFF, is synchronized and described with
XMP so that it can be more easily viewed and managed. Other applications and features (for example, Adobe Version
Cue) also use XMP to communicate and store information such as version comments, which you can search using
Adobe Bridge.
In most cases, the metadata remains with the file even when the file format changes (for example, from PSD to JPG).
Metadata also remains when files are placed in an Adobe document or project.
If you’re a C++ or Java developer, use the XMP Toolkit SDK to customize the processing and exchange of metadata.
If you’re an Adobe Flash or Flex developer, use the XMP File Info SDK to customize the File Info dialog box. For more
information, visit the Adobe website.
Working with metadata in Adobe Bridge and Adobe Creative Suite components
Many of the powerful Adobe Bridge features that allow you to organize, search, and keep track of your files and
versions depend on XMP metadata in your files. Adobe Bridge provides two ways of working with metadata: through
the Metadata panel and through the File Info dialog box.
In some cases, multiple views exist for the same metadata property. For example, a property may be labeled Author in
one view and Creator in another, but both refer to the same underlying property. Even if you customize these views
for specific workflows, they remain standardized through XMP.