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1. EP2454651 - AMBIENT CORRECTION IN ROLLING IMAGE CAPTURE SYSTEM

Office European Patent Office
Application Number 10800576
Application Date 15.07.2010
Publication Number 2454651
Publication Date 23.05.2012
Publication Kind A4
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
G06F 3/038
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
033Pointing devices displaced or positioned by the user; Accessories therefor
038Control and interface arrangements therefor, e.g. drivers or device-embedded control circuitry
CPC
G06F 3/0383
GPHYSICS
06COMPUTING; CALCULATING; 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
033Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
038Control and interface arrangements therefor, e.g. drivers or device-embedded control circuitry
0383Signal control means within the pointing device
G06F 3/0425
GPHYSICS
06COMPUTING; CALCULATING; 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
0425using a single imaging device like a video camera for tracking the absolute position of a single or a plurality of objects with respect to an imaged reference surface, e.g. video camera imaging a display or a projection screen, a table or a wall surface, on which a computer generated image is displayed or projected
G06F 3/0304
GPHYSICS
06COMPUTING; CALCULATING; 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
0304Detection arrangements using opto-electronic means
G06F 3/0416
GPHYSICS
06COMPUTING; CALCULATING; 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
0416Control or interface arrangements specially adapted for digitisers
Applicants MICROSOFT CORP
Inventors KEAM NIGEL
Designated States
Priority Data 2010042197 15.07.2010 US
22644309 17.07.2009 US
61796309 13.11.2009 US
Title
(DE) UMGEBUNGSKORREKTUR IN EINEM ROLLENDEN BILDERFASSUNGSSYSTEM
(EN) AMBIENT CORRECTION IN ROLLING IMAGE CAPTURE SYSTEM
(FR) CORRECTION AMBIANTE DANS UN SYSTÈME DE CAPTURE D'IMAGE DÉFILANT
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.

(FR)
Des modes de réalisation concernent la correction d'une image obtenue dans un système de capture d'image défilant pour une lumière ambiante. Un mode de réalisation fournit un dispositif comprenant un écran, un système de capture d'image défilant, une source lumineuse locale et un contrôleur. Le contrôleur est configuré pour faire fonctionner la source lumineuse locale tout en obtenant des première et seconde trames de données d'image pour intégrer chaque champ de pixels de détection d'image pour une durée de lumière locale + ambiante et pendant une période de lumière ambiante de sorte qu'une somme tlocal+ambient + tambient pour la première trame soit différente d'une somme tlocal+ambient + tambient pour la seconde trame pour chaque champ de pixels. Le contrôleur est en outre configuré pour déterminer une valeur de lumière ambiante et pour ajuster un ou plusieurs pixels sur la base de la valeur de lumière ambiante.