Links
Background and Summary
The IIIF Text Granularity Technical Specification Group was formed to examine how to express the granularity of text annotations associated with IIIF images, such as the output of OCR or human transcription.
Proposed Solution
The TSG determined that the need could be satisfied by use of a single property (textGranularity) applied to individual annotations. A survey of OCR software resulted in the identification of a number of common text granularity levels, which are also defined in the document.
The TSG determined that a standalone IIIF API would not be required; instead, the community extension mechanism introduced in IIIF Presentation API 3 would be used for this feature. As the document is the result of a formal TSG process, it will be hosted in the IIIF namespace. As a community extension, the document will not be semantically versioned.
Links
Background and Summary
The IIIF Text Granularity Technical Specification Group was formed to examine how to express the granularity of text annotations associated with IIIF images, such as the output of OCR or human transcription.
Proposed Solution
The TSG determined that the need could be satisfied by use of a single property (
textGranularity) applied to individual annotations. A survey of OCR software resulted in the identification of a number of common text granularity levels, which are also defined in the document.The TSG determined that a standalone IIIF API would not be required; instead, the community extension mechanism introduced in IIIF Presentation API 3 would be used for this feature. As the document is the result of a formal TSG process, it will be hosted in the IIIF namespace. As a community extension, the document will not be semantically versioned.