Uniformity Measurement for French Cinema

French cinema theaters follow strict rules; there are two French standards involved when granting theater operation licenses. One standard is about architectural considerations, the other about movie reproduction parameters. The main goal of these specifications is to ensure that movies are reproduced uniformly in all theaters while matching the intention of the creative team during final check. Another goal is to allow a satisfying perception by the audience, trying to avoid unnecessary physical or audio-visual stress. — These two standards are currently under periodic revision. The specifications listed in the standard about movie reproduction includes a uniformity formula. Counterexamples demonstrate problems with the validity of this uniformity. A new uniformity method of measurement is under study. — The proposed method unifies projection and display systems in the same measurement. The projection vignetting effect is cancelled using current room and screen dimensions. The formula is also independent of the reproduction system's dynamic range. Nine locations on screen are used as points of measurement. — The proposed measurement of uniformity is based on a statistical measurement called the K-S distance. It compares current results with a standard statistical distribution. The type of distribution is chosen based on practical considerations.

Published

2019-10

Content type

Original Research

Keywords

Movie projection, direct-view display, uniformity, throw ratio, luminance spread, cinema room architecture, SDR, EDR, HDR

DOI

10.5594/M001871