Optical intensity modulation method and system, and optical state modulation apparatus
AssigneeSony Corporation
InventorsTomohiro Nishi, Michihiro Ohnishi
Life of this patent
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Abstract
An optical intensity modulation having a periodicity in the temporal domain is applied on an optical state of an original display image, being displayed on a projection screen or a display screen, that takes into account a human temporal frequency contrast sensitivity characteristics, so that an optical state variation that is independent of the original display image would appear in an image recorded by capturing the display image using an image capturing apparatus, while the optical state variation in the display image being directly viewed remains imperceptible.
Claims11
An optical intensity modulation method comprising:
- modulating optical intensity of an original display image in the temporal domain, generating an optical state variation in a recorded image;
- image capturing a display image;
- wherein the optical state variation is independent of the original display image and generates no interfering effect in the display image, when directly viewed, and
- wherein different combinations of amplitude and frequency modulation are applied on different spatial positions in the display image.
Dependencies are inferred from the claim text.