New lightsteering projectors in cinema form images by moving light away from dark regions into bright areas of an image. In these systems, the peak luminance of small features can far exceed full screen white luminan...
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New lightsteering projectors in cinema form images by moving
light away from dark regions into bright areas of an image. In
these systems, the peak luminance of small features can far
exceed full screen white luminance. In traditional projectors
where light is filtered or blocked in order to give shades of gray
(or colors), the peak luminance is fixed. The luminance of
chromatic features benefit in the same way as white features, and
chromatic image details can be reproduced at high brightness
leading to a much wider overall color gamut coverage than
previously possible. Projectors of this capability are desired by the
creative community to aid in and enhance storytelling.
Furthermore, reduced light source power requirements of lightsteering projectors provide additional economic and
environmental benefits. While the dependency of peak luminance
level on (bright) image feature size is new in the digital cinema
space, display technologies with identical characteristics such as
OLED, LED LCD and Plasma TVs are well established in the
home. Similarly, direct view LED walls are popular in events,
advertising and architectural markets. To enable consistent color
reproduction across devices in today’s content production
pipelines, models that describe modern projectors and display
attributes need to evolve together with HDR standards and
available metadata. This paper is a first step towards rethinking
legacy display descriptors such as contrast, peak luminance and
color primaries in light of new display technology. We first
summarize recent progress in the field of lightsteering projectors
in cinema and then, based on new projector and existing display
characteristics propose the inclusion of two simple display
attributes: Maximum Average Luminance and Peak (Color)
Primary Luminance. We show that the proposed attributes allow
a better prediction of content reproducibility on HDR displays. To
validate this assertion, we test professional
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