| US 7,471,315 B2 | ||
| Apparatus and method for detecting and compensating for illuminant intensity changes within an image | ||
| Christopher Silsby, Abany, Oreg. (US); Dwight Poplin, Corvallis, Oreg. (US); and Richard L. Baer, Los Altos, Calif. (US) | ||
| Assigned to Aptina Imaging Corporation, Grand Cayman (Cayman Islands) | ||
| Filed on Mar. 14, 2003, as Appl. No. 10/388,813. | ||
| Prior Publication US 2004/0179114 A1, Sep. 16, 2004 | ||
| Int. Cl. H04N 9/73 (2006.01) | ||
| U.S. Cl. 348—226.1 | 24 Claims |
| 1. An apparatus comprising:
an image sensor array adapted to capture a scene into electrical values, a border of the image sensor array defining a plurality
of sides thereof;
a reference detector proximal to said sensor array for detecting an illuminant intensity, the reference detector being disposed
to surround at least a portion of each of two adjacent sides of the image sensor array; and
a processor (1) receiving electrical values corresponding to the detected illuminant intensity from the reference detector,
(2) computing at least a phase of the illuminant intensity using the electrical values from the reference detector and (3)
controlling the generation of a flicker correction signal having a phase matching the computed phase of the illuminant intensity.
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