ANSI-IT10.7000-2004.pdf
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1、American National Standard for Photography Digital Still Cameras Guidelines for Reporting Pixel-Related Specifications ANSI/I3A IT10.7000-2004 ANSI/I3A IT10.7000-2004 Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=USN Ship Repair Facility Yokosuka/99
2、61031100 Not for Resale, 05/08/2007 23:42:08 MDTNo reproduction or networking permitted without license from IHS -,-,- Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=USN Ship Repair Facility Yokosuka/9961031100 Not for Resale, 05/08/2007 23:42:08 MDT
3、No reproduction or networking permitted without license from IHS -,-,- ANSI/I3A IT10.7000-2004 American National Standard for Photography Digital Still Cameras Guidelines for Reporting Pixel-Related Specifications Secretariat International Imaging Industry Association Approved June 24, 2004 American
4、 National Standards Institute, Inc. Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=USN Ship Repair Facility Yokosuka/9961031100 Not for Resale, 05/08/2007 23:42:08 MDTNo reproduction or networking permitted without license from IHS -,-,- Approval of
5、an American National Standard requires review by ANSI that the requirements for due process, consensus, and other criteria for approval have been met by the standards developer. Consensus is established when, in the judgement of the ANSI Board of Standards Review, substantial agreement has been reac
6、hed by directly and materially affected interests. Substantial agreement means much more than a simple majority, but not necessarily unanimity. Consensus requires that all views and objections be considered, and that a concerted effort be made towards their resolution. The use of American National S
7、tandards is completely voluntary; their existence does not in any respect preclude anyone, whether he has approved the standards or not, from manufacturing, marketing, purchasing, or using products, processes, or procedures not conforming to the standards. The American National Standards Institute d
8、oes not develop standards and will in no circumstances give an interpretation of any American National Standard. Moreover, no person shall have the right or authority to issue an interpretation of an American National Standard in the name of the American National Standards Institute. Requests for in
9、terpretations should be addressed to the secretariat or sponsor whose name appears on the title page of this standard. CAUTION NOTICE: This American National Standard may be revised or withdrawn at any time. The procedures of the American National Standards Institute require that action be taken per
10、iodically to reaffirm, revise, or withdraw this standard. Purchasers of American National Standards may receive current information on all standards by calling or writing the American National Standards Institute. American National Standard Published by American National Standards Institute, Inc. 25
11、 West 43rd Street, New York, NY 10036 Copyright 2004 by International Imaging Industry Association (I3A) All rights reserved. No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without prior written permission of the publisher. Printed in the U
12、nited States of America Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=USN Ship Repair Facility Yokosuka/9961031100 Not for Resale, 05/08/2007 23:42:08 MDTNo reproduction or networking permitted without license from IHS -,-,- i Contents Page Foreword
13、ii 1Scope . 1 2Normative references. 1 3Terms and definitions. 1 4Relationship between pixel-related terms for image sensors and DSCs 3 5Rules for reporting 5 5.1Number of effective pixels 6 5.2Total number of image sensor cells 6 5.3Number of Recorded Pixels 7 5.4Number of Output Pixels 7 5.5Image
14、File Size. 8 5.6Image Data Compression Ratio . 8 5.7Sensor Cell Pitch 9 5.8Focal Plane Size. 9 5.935mm-equivalent Focal Length 10 5.10 Sensor optical format 10 Table 1Sensor optical formats 11 Figures 1 Relationships of pixel-related terms for image sensors 4 2 Relationship of pixel-related terms fo
15、r image sensors and DSCs 5 Annexes A Examples of suitable specifications 12 B Bibliography 13 Copyright American National Standards Institute Provided by IHS under license with ANSI Licensee=USN Ship Repair Facility Yokosuka/9961031100 Not for Resale, 05/08/2007 23:42:08 MDTNo reproduction or networ
16、king permitted without license from IHS -,-,- ii Foreword(This foreword is not part of American National Standard ANSI/I3A IT10.7000-2004.) This standard has been developed in order to meet the industry need for a standard- ized method of reporting the pixel-related specifications (e.g., the “number
17、 of pixels“) for digital still cameras (DSCs). Without an ANSI standard, several different methods will continue to be used by various camera vendors, causing significant user confu- sion. In July 2001, the Japan Camera Industries Association (JCIA) in Japan adopt- ed a “Guideline for Noting Digital
18、 Camera specifications in Catalogs“, which provides standardized pixel-related definitions for DSCs. In July 2002, JCIA was dissolved and the Camera and Imaging Products Association (CIPA) was formed. CIPA now has responsibility for the JCIA guideline. I3A/IT10 and CIPA have cooperated in the develo
19、pment of this complementary standard for the USA. The pixel-related specifications defined in this standard are not a ranking of the im- age quality of the DSC. For example, it is possible that a first DSC with a smaller re- ported value will provide better image quality than a second DSC having a l
20、arger reported value. ISO TC42 - Photography has developed a number of standards for measuring image quality related attributes of a DSC. These include ISO 12232:1998, Photography - Electronic still picture cameras - Determination of ISO speed; ISO 12233:2000, Photography - Electronic still picture
21、cameras - Resolution measurements; ISO 14524:1999, Photography - Electronic still picture camera - Methods for measuring opto-electronic conversion functions (OECFs); and ISO 15739:2003, Photography - Electronic still picture imaging - Noise measurements. It is possible that an ISO standard specifyi
22、ng guidelines for reporting pixel-related specifications for DSCs will be developed in the future. Once such an ISO standard is published, it is anticipated that this standard will be withdrawn. Annexes A and B of this standard are for information only. Suggestions for the improvement of this standa
23、rd will be welcome. They should be forwarded to the International Imaging Industry Association, Inc. (I3A), 550 Mama- roneck Avenue, Suite 310, Harrison, NY 10528, e-mail: i3astdsi3a.org. This standard was processed and approved for submittal to ANSI by I3A Technical Committee IT10, Electronic Still
24、 Picture Imaging. Committee approval of the stan- dard does not necessarily imply that all committee members voted for its approval. At the time it approved this edition of the standard, the IT10 Committee had the fol- lowing members: Kenneth Parulski, I3A/IT10 Chair Jack Holm, I3A/IT10 Vice-Chair J
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