Image processing system, projector, computer-readable medium, and image processing method
US7266240B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 23, 2004 |
| Grant date | Sep 4, 2007 |
| Priority date | — |
| Expiry date | Dec 6, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3185
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
To provide an image processing system enabling association of the coordinates of a sensed projected image in a sensing area with the coordinates of the spatial light modulator, a projector is formed of: an image projecting section which projects calibration images; a ratio information generating section which computes a ratio of image signal values or luminance values for each pixel in the sensing area obtained by sensing the calibration images, based on sensed information from a sensor which senses the calibration images, to generate ratio information; an edge point detecting section which searches the ratio information to detect corner points of a sensed projected image for each pixel having a ratio equal to or larger than a predetermined value; a pixel block image information generating section which converts sensed information of an area defined by the detected corner points into pixel block image information representing a ratio of image signal values or luminance values for each pixel block including one or more pixels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.