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Format

JTIP (JPEG Tiled Image Pyramid)

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Summary

Name
JTIP (JPEG Tiled Image Pyramid)
Identifiers
PUID: fmt/149
Format type
Image (Raster)
Disclosure
Full
Description
JTIP is a multi-resolution format, created for image presentation with easy transfer and handling, based on SPIFF. It allows presentation of images in various sizes and resolutions from vignette (1/16 screen size, used for browsing) through imagette (1/4 screen, for image comparison), to full screen and higher resolution images. Each layer is divided into tiles so the user can if or pan easily. A file contains an internal ID for tiles, with each tile associated with a single file header and separated by markers. Under header there can be and optional table noting the tile offsets, or an external ID for separate files. JTIP is not widely used and is no longer supported.
Source
Digital Preservation Department / The National Archives

Changelog

  • Updated in V67

    Release date
    26 February 2013

    JTIP (JPEG Tiled Image Pyramid): Removed .jpg as an external signature to avoid 'false-positive' identification of files with a .jpg extension which do not match any known binary signatures. This means that JPEG files that do not conform to any known signature will no longer incorrectly default to JTIP.