David William Mott

US Patent:

6400371, Jun 4, 2002

Filed:

May 18, 1998

Appl. No.:

09/081486

Inventors:

James Helman - San Carlos CA
David Mott - Mountain View CA
Chee Yu - Dublin CA

Assignee:

Liberate Technologies - San Carlos CA

International Classification:

G09G 504

US Classification:

345589, 345590, 345592, 348577, 348631, 348650, 382162

Abstract:

The invention provides an improved method and system for presenting color television signals. Television signal chrominance values for foreground elements are adjusted in response to television signal chrominance values for background elements, so as to minimize display artifacts while preserving the relative color contrast between foreground and background. (1) The invention modifies I and Q values of the foreground color to reduce the difference of the foreground I and Q with respect to the background I and Q. (2) The invention modifies Y, I and Q values of the foreground color to avoid colors known to display poorly for selected output devices. (3) The invention modifies Y values of the foreground color to maintain intended visual contrast between foreground and background colors. (4) The invention modifies Y, I and Q values of the foreground color to decrease cross-luminance separation artifacts at the border between foreground and background colors.

US Patent:

6577351, Jun 10, 2003

Filed:

May 18, 1998

Appl. No.:

09/081033

Inventors:

Chee Yu - Dublin CA
David Mott - Mountain View CA
James Helman - San Carlos CA

Assignee:

Liberate Technologies - San Carlos CA

International Classification:

H04N 5217

US Classification:

348624, 348630, 345611

Abstract:

The invention provides an improved method and system for presenting television signals, including anti-aliasing of text with respect to a background. The background color is determined relatively locally for each element to be anti-aliased, and text or other graphics overlaid on that background are anti-aliased with respect to each relatively local background color. Also, anti-aliasing can be applied to blur text and graphics more vertically than horizontally to reduce flicker, and to blur chrominance more than luminance to reduce cross-chrominance artifacts resulting from Y/C separation. Similar techniques may be used for filtering images in addition to anti-aliasing text characters.

US Patent:

20170168559, Jun 15, 2017

Filed:

Jan 20, 2017

Appl. No.:

15/411624

Inventors:

- Palo Alto CA, US
William Brendel - San Francisco CA, US
David Creighton Mott - Los Altos CA, US
Scott Paul Robertson - Mountain View CA, US

International Classification:

G06F 3/01
G06T 19/00
G06Q 30/02
G06F 3/03
G06K 19/06

Abstract:

Systems and methods for displaying an image of a virtual object in an environment are described. A computing device is used to capture an image of a real environment including a marker. One or more virtual objects which do not exist in the real environment are displayed in the image based at least on the marker. The distance and orientation of the marker may be taken into account to properly size and place the virtual object in the image. Further, virtual lighting may be added to an image to indicate to a user how the virtual object would appear with the virtual lighting.