Sustainability of Digital Formats: Planning for Library of Congress Collections |
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Introduction | Sustainability Factors | Content Categories | Format Descriptions | Contact |
Full name | ISO/IEC 15444-1:2000. Information technology -- JPEG 2000 image coding system -- Part 1: Core coding system, Amendment 1, Codestream Restrictions (2002), Profile 0 (formal name); JPEG 2000 Profile 0 (common name) |
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Description |
Implementation of JPEG 2000 Core Coding (Part 1) that constrains the use of variables in the specification ("restricts the codestream") to serve low-complexity applications, e.g., cell phones and other mobile devices. One key restriction limits image tiles to 128 pixels in each dimension; another limit (shared with profile 1) requires that the low resolution element in the image (LLD; the "D" is a subscript) also be 128 pixels in each dimension, facilitating the rapid construction of a thumbnail by most decompressors. Additional general information about JPEG 2000 profiles is provided in J2K_C Notes. |
Production phase | See J2K_C |
Relationship to other formats | |
Subtype of | J2K_C, JPEG 2000 Part 1, Core Coding System |
Used by | JP2_J2K_C_Profile_0, JP2 File with JPEG 2000 Core Coding, Profile 0 |
LC experience or existing holdings | See J2K_C |
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LC preference | See J2K_C |
Disclosure | Open standard. See J2K_C |
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Documentation | ISO/IEC 15444-1:2000. Information technology -- JPEG 2000 image coding system -- Part 1: Core coding system, Amendment 1, Codestream Restrictions (2002) |
Adoption | The compiler of this document has not found information that characterizes the extent of adoption of J2K_C_Profile_0; Comments welcome. |
Licensing and patents | See J2K_C |
Transparency | See J2K_C |
Self-documentation | See JP2_FF |
External dependencies | See J2K_C |
Technical protection considerations | See JP2_FF |
Still Image | |
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Normal rendering | See J2K_C |
Clarity (high image resolution) | See J2K_C. It is possible that some of the profile 0 constraints would limit clarity; Comments welcome. |
Color maintenance | See J2K_C |
Support for vector graphics, including graphic effects and typography | See JP2_FF |
Support for multispectral bands | Not relevant for this profile. |
Functionality beyond normal rendering | See J2K_C and JP2_FF |
Tag | Value | Note |
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Filename extension | j2c |
Extension for raw codestreams; see also JP2_FF |
Internet Media Type | See related format. | See JP2_FF |
Magic numbers | See related format. | See JP2_FF |
Indicator for profile, level, version, etc. | Rsiz=1 |
The profile indicator is the Rsiz value in the SIZ marker segment. |
General | |
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History |
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