Ping Xue

US Patent:

6792159, Sep 14, 2004

Filed:

Dec 29, 1999

Appl. No.:

09/474498

Inventors:

Richard Aufrichtig - Mountain View CA
Kenneth Scott Kump - Waukesha WI
Ping Xue - Waukesha WI

Assignee:

GE Medical Systems Global Technology Company, LLC - Waukesha WI

International Classification:

G06K 940

US Classification:

382260, 382275

Abstract:

A detector imaging system having an apparatus and method for correcting defective pixels in a current acquired image is disclosed herein. The system performs the correction of defective pixels using image feature information and temporal information. The system includes a correction scheme which includes determining a temporal matrix based on the current acquired image, at least one prior acquired image, and a filter weight; determining a local gradient based in part on the temporal matrix and a gradient kernel; and providing a correction value based on the local gradient to correct the defective pixel. The correction scheme is repeated a plurality of times as desired to correct all the defective pixels in the current acquired image.

US Patent:

7068854, Jun 27, 2006

Filed:

Dec 29, 1999

Appl. No.:

09/474715

Inventors:

Richard Aufrichtig - Mountain View CA, US
Ping Xue - Waukesha WI, US
Kenneth Scott Kump - Waukesha WI, US

Assignee:

GE Medical Systems Global Technology Company, LLC - Waukesha WI

International Classification:

G06K 9/40

US Classification:

382275, 382132, 2502081

Abstract:

A detector imaging system having an apparatus and method for correcting defective pixels in an acquired image is disclosed herein. The system includes a correction scheme including temporarily replacing a defective pixel with a linear interpolation of the defective pixel's surrounding neighboring pixel values, determining a local gradient based in part on the acquired image and a gradient kernel, and providing a correction value based on the local gradient to correct the defective pixel. The correction scheme is repeated a plurality of times as desired to correct all the defective pixels in the acquired image.