ISO/IEC 15444-4:2024
(Main)Information technology — JPEG 2000 image coding system — Part 4: Conformance testing
Information technology — JPEG 2000 image coding system — Part 4: Conformance testing
This document1 specifies the framework, concepts, methodology for testing, and criteria to be achieved to claim compliance to Rec. ITU-T T.800 | ISO/IEC 15444-1 or Rec. ITU-T T.814 | ISO/IEC 15444-15. It provides a framework for specifying abstract test suites (ATSs) and for defining the procedures to be followed during compliance testing. This document: ‒ specifies compliance testing procedures for encoding and decoding using Rec. ITU-T T.800 | ISO/IEC 15444-1 and Rec. ITU-T T.814 | ISO/IEC 15444-15; ‒ specifies codestreams, decoded images, and error metrics to be used with the testing procedures; ‒ specifies ATSs; ‒ provides guidance for creating an encoder compliance test. This document does not include the following tests: Acceptance testing: the process of determining whether an implementation satisfies acceptance criteria and enables the user to determine whether or not to accept the implementation. This includes the planning and execution of several kinds of tests (e.g., functionality, quality, and speed performance testing) that demonstrate that the implementation satisfies the user requirements. Performance testing: measures the performance characteristics of an implementation under test (IUT) such as its throughput and responsiveness, under various conditions. Robustness testing: the process of determining how well an implementation processes data which contains errors. 1 This document includes an electronic attachment with the codestreams used in the application of the procedures described the Specification.
Technologies de l'information — Système de codage d'images JPEG 2000 — Partie 4: Tests de conformité
General Information
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Standards Content (Sample)
International
Standard
ISO/IEC 15444-4
Information technology — JPEG
Fourth edition
2000 image coding system —
2024-05
Part 4:
Conformance testing
Technologies de l'information — Système de codage d'images
JPEG 2000 —
Partie 4: Tests de conformité
Reference number
© ISO/IEC 2024
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Foreword
ISO (the International Organization for Standardization) and IEC (the International Electrotechnical
Commission) form the specialized system for worldwide standardization. National bodies that are members
of ISO or IEC participate in the development of International Standards through technical committees
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technical committees collaborate in fields of mutual interest. Other international organizations, governmental
and non-governmental, in liaison with ISO and IEC, also take part in the work.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types of
document should be noted.
ISO and IEC draw attention to the possibility that the implementation of this document may involve the use of
(a) patent(s). ISO and IEC take no position concerning the evidence, validity or applicability of any claimed
patent rights in respect thereof. As of the date of publication of this document, ISO and IEC had not received
notice of (a) patent(s) which may be required to implement this document. However, implementers are
cautioned that this may not represent the latest information, which may be obtained from the patent database
available at www.iso.org/patents and https://patents.iec.ch. ISO and IEC shall not be held responsible for
identifying any or all such patent rights.
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constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www.iso.org/iso/foreword.html.
In the IEC, see www.iec.ch/understanding-standards.
This document was prepared by ITU-T (as ITU-T Rec T.803) and drafted in accordance with its editorial rules,
in collaboration with Joint Technical Committee ISO/IEC JTC 1, Information technology, Subcommittee SC 29,
Coding of audio, picture, multimedia and hypermedia information.
This fourth edition cancels and replaces the third edition (ISO/IEC 15444-4:2021), which has been technically
revised.
The main changes are as follows:
— the maximum allowable errors associated with compliance Class 1, for both Rec. ITU-T T.800 | ISO/IEC
15444-1 and Rec. ITU-T T.814 | ISO/IEC 15444-15 codestreams, have been relaxed in a few cases to
ensure that well designed 16-bit fixed-point implementations of the inverse discrete wavelet transform
should be able to pass all compliance tests for Class 1;
— two additional test codestreams have been added along with conformance bounds, to facilitate testing of
inverse wavelet and component decorrelating transform accuracy;
— a number of codestreams and files conforming to Rec. ITU-T T.801 | ISO/IEC 15444-2 have been included
for informative purposes only, to facilitate the development of decoders and file format readers that are
able to support features beyond the core capabilities found in Rec. ITU-T T.800 | ISO/IEC 15444-1 and
Rec. ITU-T T.814 | ISO/IEC 15444-15.
A list of all parts in the ISO/IEC 15444 series can be found on the ISO and IEC websites.
© ISO/IEC 2024 – All rights reserved
iii
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html and www.iec.ch/national-
committees.
© ISO/IEC 2024 – All rights reserved
iv
CONTENTS
Page
1 Scope . 1
2 References . 1
3 Definitions . 1
4 Abbreviations and symbols . 4
4.1 Abbreviations . 4
4.2 Symbols . 5
5 Conventions . 6
6 General description . 6
6.1 Profiles, derived sets and compliance classes . 7
6.2 Decoders . 8
6.3 Encoders and codestreams . 8
6.4 Implementation compliance statement . 8
6.5 Abstract test suites . 8
6.6 Encoder compliance testing procedure . 9
6.7 Decoder compliance testing procedure . 9
6.8 Procedures for testing file format readers . 9
6.9 Additional test codestreams and files . 9
7 Copyright . 9
8 Compliance files availability and updates . 9
Annex A Decoder compliance classes . 10
A.1 Compliance class parameter definitions . 10
A.1.1 Profile: codestream guarantees . 10
A.1.2 H, W, C: Image size guarantees . 10
A.1.3 N : Code-block parsing guarantee . 11
cb
A.1.4 N : Component parsing guarantee . 11
comp
A.1.5 L : Coded data buffering guarantee . 11
body
A.1.6 M: Decoded bit-plane guarantee . 12
A.1.7 P: 9-7I precision guarantee . 12
A.1.8 B: 5-3R precision guarantee . 12
A.1.9 T : Transform level guarantee . 12
L
A.1.10 L: Layer guarantee. 12
A.1.11 Progressions . 12
A.1.12 Tile-parts . 12
A.1.13 Precincts . 13
A.1.14 M : Magnitude bound guarantee . 13
MAGB
A.2 Compliance class definitions . 13
A.3 Lossless encoding and decoding . 14
Annex B Decoder compliance testing procedures . 15
B.1 General . 15
B.2 Decoder test procedure . 15
B.2.1 Files for testing . 16
B.2.2 Decoder settings . 16
B.2.3 Output file format conversion . 16
B.2.4 Compare decoded and formatted components with reference components . 18
B.2.5 Compare error metrics with specification . 18
B.2.6 Reference components file format . 18
Annex C Compliance tests . 20
C.1 Abstract test suite (informative) . 20
C.1.1 Syntax and compressed data order . 20
C.1.2 Arithmetic entropy encoding . 20
C.1.3 Coefficient bit modelling . 21
C.1.4 Quantization . 21
C.1.5 Discrete wavelet transform. 21
C.1.6 DC level shift and multiple component transform . 21
Rec. ITU-T T.803 (V3) (02/2024) v
© ISO/IEC 2024 – All rights reserved
C.1.7 Region of interest . 21
C.1.8 JP2 file format . 21
C.1.9 High throughput cleanup pass coding . 22
C.1.10 HT refinement pass coding . 22
C.1.11 Placeholder passes . 22
C.1.12 Mixing of HT and J2K code-blocks within HTJ2K codestreams . 22
C.1.13 JPH File format . 22
C.2 Executable test suite . 22
C.2.1 Class 0 Profile-0 . 23
C.2.2 Class 0 Profile-1 . 27
C.2.3 Class 1 Profile-0 . 28
C.2.4 Class 1 Profile-1 . 30
C.2.5 Class 1HF Profile 1 .
...
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