The Extensible Device Metadata (XDM) specification is an

open file format An open file format is a file format for storing digital data, defined by an openly published specification usually maintained by a standards organization, and which can be used and implemented by anyone. Open file format is licensed with open lic ...

for embedding device-related metadata in

JPEG JPEG ( ) is a commonly used method of lossy compression for digital images, particularly for those images produced by digital photography. The degree of compression can be adjusted, allowing a selectable tradeoff between storage size and im ...

and other common image files without breaking compatibility with ordinary

image viewers An image viewer or image browser is a computer program that can display stored graphical images; it can often handle various graphics file formats. Such software usually renders the image according to properties of the display such as color dep ...

. The metadata types include:

depth map In 3D computer graphics and computer vision, a depth map is an image or image channel that contains information relating to the distance of the surfaces of scene objects from a viewpoint. The term is related (and may be analogous) to ''depth ...

, camera pose,

point cloud Point or points may refer to: Places * Point, Lewis, a peninsula in the Outer Hebrides, Scotland * Point, Texas, a city in Rains County, Texas, United States * Point, the NE tip and a ferry terminal of Lismore, Inner Hebrides, Scotland * Point ...

, lens model, image reliability data, and identifying info about the hardware components. This metadata can be used, for instance, to create depth effects such as a

bokeh In photography, bokeh ( or ; ) is the aesthetic quality of the blur produced in out-of-focus parts of an image. Bokeh has also been defined as "the way the lens renders out-of-focus points of light". Differences in lens aberrations and ...

filter, recreate the exact location and position of the camera when the picture was taken, or create 3D data models of environments or objects. The format uses

XML Extensible Markup Language (XML) is a markup language and file format for storing, transmitting, and reconstructing arbitrary data. It defines a set of rules for encoding documents in a format that is both human-readable and machine-readable. ...

and is based on the XMP standard. It can support multiple "cameras" (image sources and types) in a single image file, and each can include data about its position and orientation relative to the primary camera. A camera data structure may include an image, depth map, etc. The XDM 1.0 documentation uses JPEG as the basic model, but states that the concepts generally apply to other image-file types supported by XMP, including PNG,

TIFF Tag Image File Format, abbreviated TIFF or TIF, is an image file format for storing raster graphics images, popular among graphic artists, the publishing industry, and photographers. TIFF is widely supported by scanning, faxing, word processin ...

, and

GIF The Graphics Interchange Format (GIF; or , see pronunciation) is a bitmap image format that was developed by a team at the online services provider CompuServe led by American computer scientist Steve Wilhite and released on 15 June 1987. ...

. The XDM specification is developed and maintained by a

working group A working group, or working party, is a group of experts working together to achieve specified goals. The groups are domain-specific and focus on discussion or activity around a specific subject area. The term can sometimes refer to an interdis ...

that includes engineers from

Intel Intel Corporation is an American multinational corporation and technology company headquartered in Santa Clara, California, Santa Clara, California. It is the world's largest semiconductor chip manufacturer by revenue, and is one of the devel ...

and

Google Google LLC () is an American Multinational corporation, multinational technology company focusing on Search Engine, search engine technology, online advertising, cloud computing, software, computer software, quantum computing, e-commerce, ar ...

. The version 1.01 specification is posted at the websit
xdm.org
an earlier 1.0 version was posted at th
Intel website
in late 2015. XDM builds upon th
Depthmap Metadata
specification, introduced in 2014 and used in commercial applications including Google Lens Blur and

Intel RealSense Intel RealSense Technology is a product range of depth and tracking technologies designed to give machines and devices depth perception capabilities. The technologies, owned by Intel are used in autonomous drones, robots, AR/VR, smart home devic ...

Depth Enabled Photography (DEP). That original specification was designed only for depth-photography use cases. Due to changes and expansions of the data structure, and the use of different namespaces, the two standards are not compatible. Existing applications that used that older standard will not work with XDM without modifications.

References

External links

XDM 1.01 beta documentation

XDM 1.0 beta documentation

XMP Specification

Depthmap Metadata specification
Digital photography Metadata Computer vision {{CCBYSASource, sourcepath=https://software.intel.com/sites/default/files/managed/2a/f2/XDM-Specification.pdf, sourcearticle=XDM, revision=692628038

See also

References

External links