| US 7,460,688 B2 | ||
| System and method for detecting and correcting defective pixels in a digital image sensor | ||
| John H. Stanback, Ft Collins, Colo. (US); Xuemei Zhang, Mountain View, Calif. (US); Ramakrishna Kakarala, Santa Clara, Calif. (US); and Bond Yu Pong Ying, Corvallis, Oreg. (US) | ||
| Assigned to Aptina Imaging Corporation, Grand Cayman (Cayman Islands) | ||
| Filed on Dec. 09, 2004, as Appl. No. 11/7,979. | ||
| Prior Publication US 2006/0126127 A1, Jun. 15, 2006 | ||
| Int. Cl. G06K 9/00 (2006.01) | ||
| U.S. Cl. 382—103 [382/275; 348/246; 348/247] | 20 Claims |
| 1. A digital image sensor comprising:
an array of pixels comprising a current pixel in a first color plane that is configured to produce a current sensor value,
a first plurality of pixels in the first color plane that is configured to produce a first plurality of sensor values, and
a second plurality of pixels in the second color plane that is configured to produce a second plurality of sensor values;
and
a processor configured to generate a plurality of estimate values using the first plurality of sensor values and a plurality
of intensity ratios associated with the second plurality of sensor values, and the processor configured to determine whether
the current pixel is defective using the plurality of estimate values and the current sensor value;
wherein the first plurality of pixels in the first color plane are disposed at locations of the array that are different from
pixel locations of the second color plane.
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