Format Description Categories
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NDNP Profile for JPEG 2000, Part 1, Core Coding
Format Description Properties
- ID: fdd000192
- Short name: J2K_C_NDNP
- Content categories:
- Format Category:
- Other facets:
unitary, binary, sampled
- Last significant update:
- Draft status: Full
Identification and description
||JPEG 2000 NDNP Profile
||Implementation of JPEG 2000 Core Coding (Part 1) that constrains the use of variables in the specification and has been designed to support the National Digital Newspaper Program (NDNP). A number of elements are required by the specification, including but not limited to:
• Grayscale imagery: file to contain only one 8-bit component, color specification to be the grayscale enumerated color space or the Monochrome Input restricted ICC profile
• Lossy compression: wavelet transform to use the 9-7 irreversible filter
• RLCP progression order (Resolution level-Layer-Component-Position), thus providing a progression "by quality" to make it easy to extract low resolution thumbnails or a navigation pane.
• Image tiles at 1024x1024
• Specified metadata to be provided in the JPEG 2000 XML box
Additional general information about JPEG 2000 profiles is provided in J2K_C Notes.
||Used for content in middle and final states.
|Relationship to other formats
JPEG 2000 Part 1, Core Coding System
JP2 File with JPEG 2000 Core Coding, NDNP Profile
|LC experience or existing holdings
Quality and functionality factors
|Clarity (high image resolution)
|Support for vector graphics, including graphic effects and typography
|Support for multispectral bands
||Not relevant to this profile.
|Functionality beyond normal rendering
||See J2K_C and JP2_FF
File type signifiers
|Internet Media Type
|Indicator for profile, level, version, etc.
||From the specification: "This profile corresponds to Profile-1 of the JPEG2000 standard . . . Rsiz=2."
||Chronicling America, as the National Digital Newspaper Project (NDNP) is known, is a twenty-year project that will digitize millions of newspaper pages, generally by scanning pre-existing microfilms.
||The development of the NDNP JPEG 2000 profile was led by Robert Buckley, for many years a researcher with Xerox, and active in the JPEG 2000 and other standards efforts. A preliminary version of the specification was posted online during 2005; the current version was posted in May 2006.
- Chronicling America (http://chroniclingamerica.loc.gov). The National Digital Newspaper Program Web site.
Thursday, 05-Jan-2012 15:56:08 EST