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.

US Patent:

8605862, Dec 10, 2013

Filed:

Sep 27, 2010

Appl. No.:

12/891016

Inventors:

Paul Richard Granfors - Berkeley CA, US
John Robert Lamberty - Oconomowoc WI, US
Richard Gordon Cronce - Waukesha WI, US
Ping Xue - Pewaukee WI, US
Marc Schaepkens - Clifton Park NY, US
Aaron Judy Couture - Schenectady NY, US
Douglas Albagli - Clifton Park NY, US

Assignee:

General Electric Company - Schenectady NY

International Classification:

H05G 1/64
G01T 1/24

US Classification:

378 988, 25037009

Abstract:

In one embodiment, a digital X-ray detector is provided with a plurality of pixel regions. Each pixel region includes a first photodiode having a first area and a second photodiode having a second area equal to or smaller than the first area. The digital X-ray detector also includes a shielding structure that overlies the first and second photodiodes of each pixel region with the shielding structure shielding proportionally less of the first photodiode than of the second photodiode to provide the first photodiode with a first sensitivity and the second photodiode with a second sensitivity lower than the first sensitivity.