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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS ISO 11316:1999 ICS 37.
2、040.10 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Photography Projection of still pictures Measuring methods for the evaluation of imaging properties Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 12:59:57 GMT+00:00 2006, Uncontrolled Copy, (c) BSI This British St
3、andard, 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 November 1999 BSI 11-1999 ISBN 0 580 32625 X BS ISO 11316:1999 Amendments issued since publication Amd. No
4、.DateComments National foreword This British Standard reproduces verbatim ISO 11316:1999 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 responsibility to: aid enquirers to understand the t
5、ext; 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 organizations represented on this commit
6、tee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled International Standards Correspondence Index, or by using
7、 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 of itself confer immunity fro
8、m legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages ii and iii, a blank page, pages 1 to 8, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued
9、. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 12:59:57 GMT+00:00 2006, Uncontrolled Copy, (c) BSI A Reference number ISO 11316:1999(E) INTERNATIONAL STANDARD ISO 11316 First edition 1999-10-15 Photography Projection of still pictures Measuring methods for the evaluation of imaging propert
10、ies Photographie Projection de prises de vue Mthodes de mesure pour lvaluation des caractristiques dimage Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 12:59:57 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 11316:1999(E) ii Contents 1 Scope1 2 Normative references1 3 Terms and definitions
11、.1 4 Projection picture modulation measurement .2 4.1 Test projection pattern.2 4.2 Detector .2 4.3 Measuring method3 4.4 Conditions for the measurement 3 5 Measuring the projected picture-height distortion, radial.3 6 Projection stray light.4 Annex A (informative) Application for 35 mm slide projec
12、tors.5 Bibliography8 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 12:59:57 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 11316:1999(E) iii Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work
13、 of preparing International Standards is normally carried out 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-governmen
14、tal, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting
15、. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard ISO 11316 was prepared by Technical Committee ISO/TC 42, Photography. Annex A of this International Standard is for information only. Licensed Copy: sheffieldun s
16、heffieldun, na, Sun Nov 26 12:59:57 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 12:59:57 GMT+00:00 2006, Uncontrolled Copy, (c) BSI INTERNATIONAL STANDARD ISO 11316:1999(E) 1 Photography Projection of still pictures Measuring methods for the eval
17、uation of imaging properties 1 Scope This International Standard specifies methods for the objective determination of the imaging properties of still projection by the measurement of modulation, picture-height distortion and stray light. In particular, the modulation for two local frequencies is det
18、ermined objectively by the projection of line pairs or edges. Annex A (informative) provides an example relating to slide projectors for slides of nominal size 24 mm 36 mm. NOTE The test slide specified for the measurement of modulation is not suitable for use in a subjective assessment. 2 Normative
19、 references The following normative documents contain provisions, which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based
20、 on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of curren
21、tly valid International Standards. ISO 5-2:1991, Photography Density measurements Part 2: Geometric conditions for transmission density. ISO 5-3:1995, Photography Density measurements Part 3: Spectral conditions. ISO 1755:1987, Projector slides Dimensions. ISO 9039:1994, Optics and optical instrumen
22、ts Quality evaluation of optical systems Determination of distortion. CIE-Publ. No. 17.4:1987, International Lighting Vocabulary same edition by IEC-Publ. 50 (845): International Electrotechnical Vocabulary, Chapter 845: Lighting. CIE-Publ. No. 50:1979, Proceedings at the 1979 CIE Session ( Kyoto).
23、3 Terms and definitions For the purposes of this International Standard, the following terms and definitions apply. 3.1 projected-picture modulation relationship between the illumination of test projection pattern measured in the light and the dark areas on screen 3.2 test projection pattern pairs o
24、f lines in a rectangular position at two local frequencies on five measuring points EXAMPLE See Figures A.1 and A.2. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 12:59:57 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 11316:1999(E) 2 3.3 projected picture-height distortion distortion on a
25、projected picture measured on screen 3.4 projection stray light relationship between the illumination of test projection pattern on screen measured in the large dark field and in the light area nearby the centre in percent 4 Projection picture modulation measurement 4.1 Test projection pattern The b
26、ase of the test projection pattern shall be glass. The ISO standard visual diffuse transmission density of the material, in accordance with ISO 5-2 and ISO 5-3, shall not exceed D = 0,1. The optical density of the dark elements should exceed the optical density of the base by at least 3,0. NOTE Sinc
27、e the optical density of the dark elements which have been produced on the screen by photographic means varies due to projection duration, light of the projection and rise in temperature in the picture frame, the pattern and the base material shall be made resistant, e.g. by depositing a chrome laye
28、r on it. Size and external dimensions of the test projection pattern should, for each special purpose, conform to the image sizes defined in the relevant standards. The test projection pattern shows an arrangement of structures with two perpendicular orientations. 4.2 Detector The photoelectric dete
29、ctor shall have a colour sensitivity similar to Vl as specified in CIE No. 50, term 845-01-22. In front of the detector a pinhole or a slit is needed. In the case of a slit, the orientation is to be set parallel to the projected structure of the test object. The detector shall be kept on screen in t
30、wo positions for each measuring. a) In the centre of projected bright lines (Imax). b) In the centre of projected dark lines (Imin), symbols (and abbreviated terms). Figure 1 Detector set-up p M P 3,0) elements in tangential and radial orientation. The modulation shall be evaluated for the two local
31、 frequencies 5 mm-1 and 20 mm-1. If the test object is an edge, computations are needed to calculate the line spread function and thereafter per Fourier transformation the modulation for the defined local frequencies. If the test pattern consists already of these two frequencies according to Figure
32、A.1 the modulation M shall be calculated as follows: M II II = + max min max min (A.1) Imax = Illumination in the centre of bright lines Imin = Illumination in the centre of dark lines For each of the five measuring points, adjustment of the photoelectric detector shall be made by setting zero in th
33、e centre of the dark field. According to the higher local frequency of 20 mm-1 and the projection magnification of 50:1 the dimension p of the detector shall be 0,3 mm (pinhole diameter or width in a rectangular slit and a length of 2/3 of the length of the lines). p M P freq. 8 p 50 20 6 p0 3 , mm
34、Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 12:59:57 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 11316:1999(E) 6 NOTE Local frequencies 5 mm-1 and 20 mm-1 are not shown in correct proportion. Figure A.1 Test structure Ex (dimensions in mm) In order to compensate for fluctuation of the
35、measuring results which occurs when putting up the slide projector or when focusing, the measuring method is executed five times and each arithmetic average is recorded in a table. These average values will serve as a basis for further calculations. Before executing each of the five measurements it
36、is necessary to repeat the focusing every time in order to obtain meaningful results. The projection magnification 50:1 is given when the square test structure E5 with 2 mm length (Figure A.2) shows 100 mm in projection. Figure A.2 Test-slide projection Licensed Copy: sheffieldun sheffieldun, na, Su
37、n Nov 26 12:59:57 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 11316:1999(E) 7 The results of an example modulation test according to this International Standard are shown in Table A.1. Local frequency Measuring point 5 mm-120 mm-1 Radially Tangentially Mean value Radially Tangentially Mean value
38、Measuring values for modulation 1 3 5 7 9 0,824 0,857 0,859 0,783 0,777 0,822 0,680 0,865 0,809 0,745 0,823 0,768 5 0,862 0,796 0,761 0,399 0,348 0,518 0,107 0,111 0,370 0,232 0,481 0,180 0,136 0,384 5 0,290 0,499 5 0,143 5 0,123 5 Arithmetical mean values 0,8 0,29 Uniformity of modulation g588,3 %g
39、2024,7 % A.2 Measuring of the picture-height distortion, radial (clause 5) On the test pattern (Figure A.2), the two horizontal lines have a distance of 20 mm. When projecting these lines with a magnification of 50, the distance on screen of these lines should be 1 000 mm. Due to distortion, this di
40、stance is not constant over the whole length of the lines. The evaluation of picture-height distortion V shall be made according to the formulae (1) and (2) in clause 5. A.3 Measuring of projection stray light The evaluation of projection stray light shall be made according to clause 6. Licensed Cop
41、y: sheffieldun sheffieldun, na, Sun Nov 26 12:59:57 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 11316:1999(E) 8 Bibliography EBU Tech. 3249 Measurement and analysis of the performance of film and television camera lenses. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 12:59:57 GMT+00:00 2
42、006, Uncontrolled Copy, (c) BSI Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 12:59:57 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 11316:1999 BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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