| US 7,545,397 B2 | ||
| Enhancing contrast | ||
| Stephen R. O'Dea, Wilmington, Mass. (US); Michael O'Connell, Northborough, Mass. (US); and William Berardi, Grafton, Mass. (US) | ||
| Assigned to Bose Corporation, Framingham, Mass. (US) | ||
| Filed on Oct. 25, 2004, as Appl. No. 10/972,595. | ||
| Prior Publication US 2006/0088275 A1, Apr. 27, 2006 | ||
| Int. Cl. G09G 3/02 (2006.01) | ||
| U.S. Cl. 345—694 [345/77; 345/204; 345/207; 345/690; 345/692] | 28 Claims |
| 22. A video processing system having a display and video signal comprising:
a device for detecting ambient light levels on the display and for providing a detected ambient light level signal;
a processor responsive to the detected ambient light level signal for:
processing the video signal, and
performing pixel-by-pixel contrast enhancement processing on the video signal based on the detected ambient light levels to
provide a processed video signal, the contrast enhancement processing comprising performing a spatial filtering operation
on the video signal to determine luminance on a pixel-by-pixel basis; and
a display device having an active screen area for presenting the processed video signal on the display and surrounding areas.
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