Computational imaging of the electric grid
AssigneesTechnion Research & Development Foundation Limited, The Governing Council of the University of Toronto
InventorsMark Sheinin, Yoav Schechner, Yoash Levron, Kiriakos Neoklis Kutulakos
Life of this patent
Estimating the term…
Abstract
A method comprising receiving data representing light intensity values corresponding to a flicker pattern of a reference light source powered by an alternating current (AC); operating a controllable illumination source, based, at least in part, on said data; capturing, using an imaging device, a sequence of images of a scene illuminated, at least in part, by said controllable illumination source; estimating an intensity value for at least one pixel in said array, correspondingly in each of said images in said sequence of images; and determining a temporal point in said flicker pattern of said reference light source, based, at least in part, on said estimating.
Claims19
A system comprising an imaging device comprising a light sensing element comprising an array of pixels;
- a controllable illumination source;
- at least one hardware processor;
- and
- a non-transitory computer-readable storage medium having stored thereon program instructions, the program instructions executable by the at least one hardware processor to:
- receive data representing light intensity values corresponding to a flicker pattern of a reference light source powered by an alternating current (AC) of an AC grid;
- operate said controllable illumination source, based on said data, to replicate said flicker pattern of said reference light source;
- capture, using said imaging device, a sequence of images of a scene illuminated by one or more light sources attached to the AC grid, and a diffuse surface, illuminated at least in part, by said controllable illumination sourced;
- calculate an intensity value for at least one specified pixel in said array in each of said images in said sequence of images, to estimate a temporal response of a specific light source of the one or more light sources to the AC in relation to the flicker pattern;
- and
- determine one or more characteristics of said AC grid, based, at least in part, on said estimating.
A method comprising:
- operating at least one hardware processor for:
- receiving data representing light intensity values corresponding to a flicker pattern of a reference light source powered by an alternating current (AC) of an AC grid;
- operating a controllable illumination source, based on said data, to replicate said flicker pattern of said reference light source;
- operating an imaging device to capture a sequence of images of a scene illuminated, by one or more light sources attached to the AC grid, and a diffuse surface, illuminated at least in part, by said controllable illumination sourced;
- calculating an intensity value for at least one specified pixel in said array in each of said images in said sequence of images, to estimate a temporal response of a specific light source of the one or more light sources to the AC in relation to the flicker pattern;
- and
- determining one or more characteristics of said AC grid, based, at least in part, on said estimating.
A computer program product comprising a non-transitory computer-readable storage medium having program instructions embodied therewith, the program instructions executable by at least one hardware processor to:
- receive data representing light intensity values corresponding to a flicker pattern of a reference light source powered by an alternating current (AC);
- operate a controllable illumination source, based on said data to replicate said flicker pattern of said reference light source;
- operate an imaging device to capture a sequence of images of a scene illuminated, by one or more light sources attached to the AC grid, and a diffuse surface, illuminated at least in part, by said controllable illumination source;
- calculating estimate an intensity value for at least one specified pixel in said array in each of said images in said sequence of images, to estimate a temporal response of a specific light source of the one or more light sources to the AC in relation to the flicker pattern;
- and determine one or more characteristics of said AC grid, based, at least in part, on said estimating.
Dependencies are inferred from the claim text.