FREQUENCY DOMAIN PROCESSING OF IMAGE USED TO DRIVE MULTI-PIXEL LIGHTING DEVICE OUTPUT

摘要

A lighting system uses a multi-pixel lighting matrix, for example, having an n by m pixel matrix of light emitters, to provide illumination from a ceiling or wall. Instead of using an actual image or video, which may be distracting, the examples in this case manipulate a frequency domain representation, for example, in Fourier transform space. The representation is transformed to real time image space, to drive the matrix of the lighting device. Manipulation in the frequency domain can maintain image characteristics suitable to an intended illumination application yet produce an output illumination image on the matrix that is less obviously an image of an object and less likely to draw unnecessary attention from an occupant of the illuminated space.

主权项

1. A lighting system, comprising:
a pixel matrix of light emitters, each light emitter at a respective pixel of the matrix comprising a source of light configured to be controlled to vary a characteristic of light emitted from the respective pixel; a driver circuit connected to the pixel matrix and configured to control the light emitters at the pixels of the matrix responsive to an image input; and an image data processor configured to implement functions, including functions to:
obtain a frequency domain data set corresponding to an image;manipulate at least one aspect of the frequency domain data set to form a manipulated frequency domain data set;transform the manipulated frequency domain data set into an image domain data set; andsupply the image input for use by the driver circuit, based at least in part on the image domain data set.