ISO 2910:2007
(Main)Cinematography — Screen luminance and chrominance for the projection of motion pictures
Cinematography — Screen luminance and chrominance for the projection of motion pictures
ISO 2910:2007 specifies the screen luminance level and chrominance white point for theatrical projection of 70 mm, 35 mm and 16 mm motion-picture prints at a rate of 24 frames per second. ISO 2910:2007 can also be applicable to the non-theatrical presentation of 70 mm, 35 mm and 16 mm motion-picture prints intended for projection at 24 frames per second.
Cinématographie — Luminance et chrominance des écrans pour la projection de films
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Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 2910
Third edition
2007-02-01
Cinematography — Screen luminance
and chrominance for the projection of
motion pictures
Cinématographie — Luminance et chrominance des écrans pour la
projection de films
Reference number
ISO 2910:2007(E)
©
ISO 2007
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ISO 2910:2007(E)
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ii © ISO 2007 – All rights reserved
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ISO 2910:2007(E)
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 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
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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 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees 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 document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 2910 was prepared by Technical Committee ISO/TC 36, Cinematography.
This third edition cancels and replaces the second edition (ISO 2910:1990), which has been technically
revised.
© ISO 2007 – All rights reserved iii
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INTERNATIONAL STANDARD ISO 2910:2007(E)
Cinematography — Screen luminance and chrominance for the
projection of motion pictures
1 Scope
This International Standard specifies the screen luminance level and chrominance white point for theatrical
projection of 70 mm, 35 mm and 16 mm motion-picture prints at a rate of 24 frames per second.
This International Standard can also be applicable to the non-theatrical presentation of 70 mm, 35 mm and
16 mm motion-picture prints intended for projection at 24 frames per second.
NOTE Throughout this International Standard, the term “screen” means the screen-picture area appropriate to the
film format and projection system in use.
2 Measurement method
2.1 Operating conditions
Measure the luminance and chrominance with the projector operating at a nominal projection speed of
24 frames per second with the shutter running and without film in the gate.
NOTE Measured luminance and chrominance are affected by the lens in use as well as other optical components.
2.2 Luminance measuring device
The screen luminance shall be measured with a photometer having an acceptance angle not greater than 2°
[1]
(recommended value 1,5°), having the spectral sensitivity of a Standard Observer agreed by the
International Commission on Illumination in 1924, and adopted in 1933 by the International Committee of
Weights and Measures.
2.3 Chrominance measuring device
The screen chrominance shall be measured with a colour temperature meter or a spot spectroradiometer with
an acceptance angle not greater than 2°.
2.4 Position of measuring device in theatres
In theatres, the measurements shall be taken with the suitable meter located approximately 1 m above the
floor on the longitudinal axis of the theatre at a position two-thirds of the distance from the screen to the back
row of seats (measured from the screen). To ensure satisfactory performance in all parts of the theatre,
measurements shall also be taken with the meter located at two points
...
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