The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 16, 2007
Filed:
Sep. 18, 2002
Ramakrishna Kakarala, Sunnyvale, CA (US);
Xuemei Zhang, Mountain View, CA (US);
Bond Yu-pong Ying, Corvallis, OR (US);
John H. Stanback, Fort Collins, CO (US);
Ramakrishna Kakarala, Sunnyvale, CA (US);
Xuemei Zhang, Mountain View, CA (US);
Bond Yu-Pong Ying, Corvallis, OR (US);
John H. Stanback, Fort Collins, CO (US);
Micron Technology, Inc., Boise, ID (US);
Abstract
A bad pixel correction (BPC) algorithm that can be implemented on the image sensor chip is provided for detecting and correcting defective pixels in a digital color image sensor. Gradients of neighboring pixels in at least one other color plane than the color plane of a current pixel and a range of sensor values from neighboring pixels in the same color plane as the current pixel are determined. If the sensor value of the current pixel is outside of the range by a threshold amount that is calculated using one or more of the gradients, the current pixel is determined to be a defective pixel, and replaced using the sensor values of the neighboring pixels in the same color plane.