DIG35 Specification: Metadata for Digital Images. Version 1.0

Annex A:Basic Image Parameter Metadata DIG35 Specification 2000-08-30Annex A: Basic ImageParameter MetadataA.1 OverviewThis Annex defines basic image parameter metadata that contains generic information about the image, such as the image sizeand number of components. While this metadata that are commonly referred to as the “Header Data” of an image file format, thescope of this Annex is to define metadata that is file format independent. Thus this metadata should be considered informationaland not to be used to decode the image data stored in the associated file. The metadata fields would be considered secondary tothe image data.The metadata defined in this Annex is useful where the metadata is stored externally to the image file. For example, the numberof pixels may be determined without interrogating the image file. In files such as the Flashpix file format where the fieldsdefined in this section are clearly defined in the file specification, it would not be expected that the metadata fields would bestored. This is opposite to a file such as a BMP where this metadata is not defined and would be useful.A.2 StructureThe following diagram illustrates the logical structure of the Basic Image Parameter Metadata.DIG35 MetadataBasic ImageParameterImage CreationContentDescriptionHistoryIPR &ExploitationBasic Image Information (A.3.1)File and Format (A.3.1.1)Image Identifier (A.3.1.2)Image Size (A.3.1.3)Compression Method (A.3.1.4)Preferred Presentation Parameters (A.3.2)Color Information (A.3.3)Colorspace (A.3.3.1)Component Information (A.3.4)Figure A-1: Basic Image Parameter metadata structureVersion 1.0 © 2000 Digital Imaging Group, Inc. 19