ITU-T T.24-1998 标准化数字图像集 Standardized Digitized Image Set - Series T: Terminals for Telematic Services Study Group 8; 64 pp

pdf标准 ITU-T T.24-1998 标准化数字图像集 Standardized Digitized Image Set - Series T: Terminals for Telematic Services Study Group 8; 64 pp

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ITU-T T.24-1998 标准化数字图像集 Standardized Digitized Image Set - Series T: Terminals for Telematic Services Study Group 8; 64 pp 第 1 页 ITU-T T.24-1998 标准化数字图像集 Standardized Digitized Image Set - Series T: Terminals for Telematic Services Study Group 8; 64 pp 第 2 页 ITU-T T.24-1998 标准化数字图像集 Standardized Digitized Image Set - Series T: Terminals for Telematic Services Study Group 8; 64 pp 第 3 页 ITU-T T.24-1998 标准化数字图像集 Standardized Digitized Image Set - Series T: Terminals for Telematic Services Study Group 8; 64 pp 第 4 页 ITU-T T.24-1998 标准化数字图像集 Standardized Digitized Image Set - Series T: Terminals for Telematic Services Study Group 8; 64 pp 第 5 页
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国外分类,ITU,ITU-T(电信标准分局),itu,标准,标准化,数字,图像,数字图像,standardized,digitized,image,set,series,terminals,for,telematic,services,study,group,pp

INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU T.24 (06/98) SERIES T: TERMINALS FOR TELEMATIC SERVICES Standardized digitized image set ITU-T Recommendation T.24 (Previously CCITT Recommendation) ITU-T RECOMMENDATION T.24 STANDARDIZED DIGITIZED IMAGE SET Summary The images in this Recommendation include the original eight "ITU-T images" (referred to for years as the "CCITT images"), two bi-level test charts, a gray-scale test chart, various screened half-tone images, electronically dithered images, computer-generated images, gray-scale images and color images. The purpose of this image set is to provide a consistent baseline for future work; for example, results of compression algorithm experiments and image quality tests can be compared by a broad range of users, knowing that the input image data is identical. The specimens reproduced inside the Recommendation in the figures are given for illustration purposes and are not suitable for measurements. Source ITU-T Recommendation T.24 was revised by ITU-T Study Group 8 (1997-2000) and was approved under the WTSC Resolution No. 1 procedure on the 18th of June 1998. Recommendation T.24 (06/98) i FOREWORD ITU (International Telecommunication Union) is the United Nations Specialized Agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of the ITU. The 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 Conference (WTSC), which meets every four years, establishes the topics for study by the ITU-T Study Groups which, in their turn, produce Recommendations on these topics. The approval of Recommendations by the Members of the ITU-T is covered by the procedure laid down in WTSC Resolution No. 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 term recognized operating agency (ROA) includes any individual, company, corporation or governmental organization that operates a public correspondence service. The terms Administration, ROA and public correspondence are defined in the Constitution of the ITU (Geneva, 1992). INTELLECTUAL PROPERTY RIGHTS The ITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. The 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, the ITU had not 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. ã ITU 1999 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the ITU. ii Recommendation T.24 (06/98) CONTENTS Page 1 Eight ITU-T reference images .................................................................................... 1 2 T.22 Test Chart No. 4 – Black-White Facsimile Test Chart BW01 ........................... 11 3 Legibility Test Chart ................................................................................................... 13 4 Bi-level Half-tones...................................................................................................... 15 5 T.22 Test Chart No. 5 – Continuous Tone Test Chart CT01...................................... 20 6 House with Trees and House with Sky ....................................................................... 22 7 T.23 Test Chart No. 6 – 4-Color Printing Facsimile Test Chart 4CP01..................... 24 8 CCIR Images............................................................................................................... 26 9 Color Images (CMYK color space) ............................................................................ 28 10 Color Images (RGB color space) ................................................................................ 33 11 Fingerprint and Medical Images (Gray scale)............................................................. 37 12 Line Drawing Images...............................................

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