BS-ISO-14524-1999.pdf
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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS ISO 14524:1999 ICS 37.
2、040.10 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Photography Electronic still-picture cameras Methods for measuring opto-electronic conversion functions (OECFs) Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 08:37:18 GMT+00:00 2007,
3、 Uncontrolled Copy, (c) BSI This British Standard, having been prepared under the direction of the Consumer Products and Services Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 April 2000 BSI 04-2000 ISBN 0 580 34623 4 BS ISO 14524:1999 Ame
4、ndments issued since publication Amd. No.DateComments National foreword This British Standard reproduces verbatim ISO 14524:1999 and implements it as the UK national standard. The UK participation in its preparation was entrusted to Technical Committee CPW/42, Photography, which has the responsibili
5、ty to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of
6、organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled International Standards Corre
7、spondence Index, or by using the Find facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not o
8、f itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages ii to v, a blank page, pages 1 to 21 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last is
9、sued. Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 08:37:18 GMT+00:00 2007, Uncontrolled Copy, (c) BSI Reference number ISO 14524:1999(E) INTERNATIONAL STANDARD ISO 14524 First edition 1999-12-15 Photography Electronic still-picture cameras Methods for measur
10、ing opto-electronic conversion functions (OECFs) Photographie Appareils de prises de vue lectroniques Mthodes de mesure des fonctions de conversion opto-lectroniques Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 08:37:18 GMT+00:00 2007, Uncontrolled Copy, (c)
11、BSI ISO14524:1999(E) ii? Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 08:37:18 GMT+00:00 2007, Uncontrolled Copy, (c) BSI ISO 14524:1999(E) ?iii Contents 1?Scope 1 2?Normative references1 3?Terms and definitions .1 4?Test methods3 4.1?General information.3 4.
12、2?Camera OECF measurement4 4.3?Focal plane OECF measurement (method A) .4 4.4?Alternative focal plane OECF measurement (method B).4 5?Illumination.5 5.1?Focal plane OECF measurement (method A) .5 5.2?Alternative focal plane (method B) and camera OECF measurement5 6?Test conditions 5 6.1?Temperature
13、and relative humidity5 6.2?White balance (only applicable to colour cameras).5 6.3?Infrared (IR)-blocking filter6 6.4?Focus 6 7?Input7 7.1?Focal plane log exposures7 7.2?Camera OECF chart log luminances7 8?Data analysis8 9?Presentation of results8 9.1?Tabular presentation .9 9.2?Graphical presentati
14、on11 Annex A (normative) ISO camera OECF test chart13 Annex B (informative) Relevance of the ISO 7589 spectral distribution index.17 Annex C (informative) Reporting of the camera OECF in relative reflectance units19 Bibliography21 Licensed Copy: London South Bank University, London South Bank Univer
15、sity, Thu Mar 01 08:37:18 GMT+00:00 2007, Uncontrolled Copy, (c) BSI ISO 14524:1999(E) iv? Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried o
16、ut through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO c
17、ollaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. Draft International Standards adopted by the technical committees
18、 are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of patent rights. ISO sh
19、all not be held responsible for identifying any or all such patent rights. International Standard ISO 14524 was prepared by Technical Committee ISO/TC 42,Photography. Annex A forms a normative part of this International Standard. Annexes B to C are for information only. Licensed Copy: London South B
20、ank University, London South Bank University, Thu Mar 01 08:37:18 GMT+00:00 2007, Uncontrolled Copy, (c) BSI ISO 14524:1999(E) ?v Introduction This International Standard was prepared by Technical Committee ISO/TC 42,Photography, Working Group 18, Electronic still picture imaging. It establishes sta
21、ndard methods for measuring the functional relationship between the focal-plane log exposures or scene luminances, and the digital output levels of a digital camera. This information is required for the development and testing of digital cameras, is used in other electronic still-picture camera meas
22、urement standards, and may be helpful in the processing of digital image data. An opto-electronic conversion function (OECF) measurement standard is required for several reasons. a)?Well-established measurement methods have been used to determine the characteristic curves for television cameras, whe
23、re the characteristic curve is known as the “gamma correction“ curve, and for silver halide photography, where the characteristic curve is known as the “H not logged) multiplied by the system incremental gain at that level See incremental gain function (3.6) 3.8 illuminance scale exposure series ser
24、ies of exposures produced using constant exposure time and varying focal plane illuminance See time scale exposure series (3.15) 3.9 maximum exposure limit smallest exposure which produces the digital output level corresponding to the maximum detectable exposure which is also known as the saturation
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