Interactive whiteboards and programs

Patent metadata

Field	Value
Publication number	US-9024901-B2
Application number	US-201113818397-A
Country	US
Kind code	B2
Filing date	Aug 12, 2011
Priority date	Aug 25, 2010
Publication date	May 5, 2015
Grant date	May 5, 2015

Abstract

Provided is a technique of correcting influences of optical environment to correctly recognize the color of an input object used for inputting of coordinates, and enabling automatic designation of a color to be used for drawing. A coordinate detection unit detects coordinates of an input object. Next, display light on the display plane in the vicinity of the coordinates is estimated from display data, and a correction value to remove influences of the display light is calculated. A captured image of an input object used for input operations on the display plane is extracted, and the color of the captured image is corrected with a display light correction value. Thereby, influences of the display light added to the input object are removed, enabling the original color of the input object to be identified.

First claim

The invention claimed is:

1. An interactive whiteboard, comprising:
a coordinate detection unit configured to detect, as two-dimensional coordinates on a display plane, a contact position of an input object with reference to the display plane or an operating position of the input object with reference to a detection plane set in front side of the display plane;
an image-capturing unit configured to capture, as a color image, an image of a vicinity of at least a region where two-…

Assignees

• Miyazaki Hiroshi
• Hitachi Solutions Ltd

Inventors

• Miyazaki Hiroshi

Classifications

• G06F3/0488

  Physics · mapped topic

• G06F3/0418 Primary

  Physics · mapped topic

• G06F3/0421

  Physics · mapped topic

• G06F3/0412 Primary

  Physics · mapped topic

• H04N7/183

  Electricity · mapped topic