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1. US20110012866 - Ambient correction in rolling image capture system

Office United States of America
Application Number 12617963
Application Date 13.11.2009
Publication Number 20110012866
Publication Date 20.01.2011
Grant Number 08289300
Grant Date 16.10.2012
Publication Kind B2
IPC
G06F 3/042
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
FELECTRIC DIGITAL DATA PROCESSING
3Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
01Input arrangements or combined input and output arrangements for interaction between user and computer
03Arrangements for converting the position or the displacement of a member into a coded form
041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
042by opto-electronic means
Applicants Microsoft Corporation
Inventors Keam Nigel
Agents Alleman Hall McCoy Russell & Tuttle LLP
Title
(EN) Ambient correction in rolling image capture system
Abstract
(EN)

Embodiments are disclosed that relate to the correction of an image acquired in a rolling image capture system for ambient light. One embodiment provides a device comprising a screen, a rolling image capture system, a local light source, and a controller. The controller is configured to operate the local light source while acquiring first and second frames of image data to integrate each field of image sensor pixels for a duration of local+ambient light and for a duration of ambient light such that a sum tlocal+ambient+tambient for the first frame is different than a sum tlocal+ambient+tambient for the second frame for each field of pixels. The controller is further configured to determine an ambient light value, and to adjust one or more pixels based upon the ambient light value.