ITU-T T.804-2002 信息技术 JPEG 2000图像编码系统:参考软件 T系列:电信服务终端 Information Technology - JPEG 2000 Image Coding System: Reference Software Series T: Terminals for T

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ITU-T T.804-2002 信息技术 JPEG 2000图像编码系统:参考软件 T系列:电信服务终端 Information Technology - JPEG 2000 Image Coding System: Reference Software Series T: Terminals for T 第 1 页 ITU-T T.804-2002 信息技术 JPEG 2000图像编码系统:参考软件 T系列:电信服务终端 Information Technology - JPEG 2000 Image Coding System: Reference Software Series T: Terminals for T 第 2 页 ITU-T T.804-2002 信息技术 JPEG 2000图像编码系统:参考软件 T系列:电信服务终端 Information Technology - JPEG 2000 Image Coding System: Reference Software Series T: Terminals for T 第 3 页 ITU-T T.804-2002 信息技术 JPEG 2000图像编码系统:参考软件 T系列:电信服务终端 Information Technology - JPEG 2000 Image Coding System: Reference Software Series T: Terminals for T 第 4 页 ITU-T T.804-2002 信息技术 JPEG 2000图像编码系统:参考软件 T系列:电信服务终端 Information Technology - JPEG 2000 Image Coding System: Reference Software Series T: Terminals for T 第 5 页
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INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU T.804 (08/2002) SERIES T: TERMINALS FOR TELEMATIC SERVICES Information technology – JPEG 2000 image coding system: Reference software ITU-T Recommendation T.804 INTERNATIONAL STANDARD ISO/IEC 15444-5 ITU-T RECOMMENDATION T.804 Information technology – JPEG 2000 image coding system: Reference software Summary ITU-T Rec. T.800 | ISO/IEC 15444-1 defines a set of lossless and lossy compression methods for coding continuoustone, bi-level, greyscale or colour digital still images. This Recommendation | International Standard provides two independently created software reference implementations of ITU-T Rec. T.800 | ISO/IEC 15444-1, in order to assist implementers of ITU-T Rec. T.800 | ISO/IEC 15444-1 in testing and understanding its content. The reference software is informative only. This Recommendation | International Standard does not define any additional part of the JPEG 2000 image coding system. Each version of the reference software contains source code, which may be compiled to provide the following functionality: – transcoding from selected, widely available image formats into a JPEG 2000 codestream; – transcoding from selected, widely available image formats into the JP2 file format; – selection of a wide range of JPEG 2000 encoding options (as documented in each reference software); – decoding from a JPEG 2000 codestream to a range of selected widely available image formats; – partial processing of a JP2 file to extract a JPEG 2000 codestream for decoding to a range of selected widely available image formats (not included in the reference software); – some additional tools to help with evaluation and testing. The reference software is intended for use as a testing and validation tool for other implementations of JPEG 2000, and to help in the understanding of ITU-T Rec. T.800 | ISO/IEC 15444-1. Although components of the reference software may find application in software intended for product development, this was not an objective of the development of this software, and prospective implementors are cautioned against making any estimations of performance or resource usage based on the reference software. Source ITU-T Recommendation T.804 was prepared by ITU-T Study Group 16 (2001-2004) and approved on 29 August 2002. An identical text is also published as ISO/IEC 15444-5. ITU-T Rec. T.804 (08/2002) i FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Assembly (WTSA), which meets every four years, establishes the topics for study by the ITU-T study groups which, in turn, produce Recommendations on these topics. The approval of ITU-T Recommendations is covered by the procedure laid down in WTSA Resolution 1. In some areas of information technology which fall within ITU-T's purview, the necessary standards are prepared on a collaborative basis with ISO and IEC. NOTE In this Recommendation, the expression "Administration" is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. INTELLECTUAL PROPERTY RIGHTS ITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. ITU takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the Recommendation development process. As of the date of approval of this Recommendation, ITU had received notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementors are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database.  ITU 2003 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. ii ITU-T Rec. T.804 (08/2002) CONTENTS Page 1 Scope .............................................................................................................................................................. 1 2 Normative references ..................................................................................................................................... 2.1 Identical Recommendations | Internat

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