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For example, a digital image may include metadata that describes the size of the image, its color depth, resolution, when it was created, the shutter speed, and other data. [16] A text document's metadata may contain information about how long the document is, who the author is, when the document was written, and a short summary of the document.
The Exif tag structure is borrowed from TIFF files. On several image specific properties, there is a large overlap between the tags defined in the TIFF, Exif, TIFF/EP, and DCF standards. For descriptive metadata, there is an overlap between Exif, IPTC Information Interchange Model and XMP info, which also can be embedded in a JPEG file.
Exif is a standard that specifies the image and audio file formats used by digital cameras, including some metadata tags. [32] TagSpaces is an open-source cross-platform application for tagging files; it inserts tags into the filename .
Metadata – An image may have metadata stored in EXIF or XMP formats. Transparency – An image may have transparency, i.e., an alpha channel. Color Profile – An image may have an embedded ICC profile as described by the International Color Consortium. Animation – An image may have multiple frames with pauses between them, making it an ...
XMP metadata can describe a document as a whole (the "main" metadata), but can also describe parts of a document, such as pages or included images. This architecture makes it possible to retain authorship and rights information about, for example, images included in a published document.
A metadata standard is a requirement which is intended to establish a common understanding of the meaning or semantics of the data, to ensure correct and proper use and interpretation of the data by its owners and users.
Storage of image data, such as an alpha plane or a depth map, which complements another image item. These data are not displayed as such, but used in various forms to complement another image item. Image metadata Storage of EXIF, XMP and similar metadata which accompany the images stored in the HEIF file.
An image retrieval system is a computer system used for browsing, searching and retrieving images from a large database of digital images. Most traditional and common methods of image retrieval utilize some method of adding metadata such as captioning, keywords, title or descriptions to the images so that retrieval can be performed over the annotation words.