Inventor
WILLIAMS LEON C
US43 patents
Patents
43 patentsUS6594401B1Jul 15, 2003
Detection and elimination of scanning artifacts
XEROX CORP107 citations98
US5642202AJun 24, 1997
Scan image target locator system for calibrating a printing system
XEROX CORP140 citations98
US6181829B1Jan 30, 2001
Method and system for classifying and processing of pixels of image data
XEROX CORP64 citations96
US5959290ASep 28, 1999
Image input device and method for providing scanning artifact detection
XEROX CORP84 citations96
US5809177ASep 15, 1998
Hybrid error diffusion pattern shifting reduction using programmable threshold perturbation
XEROX CORP68 citations96
US5778156AJul 7, 1998
Method and system for implementing fuzzy image processing of image data
XEROX CORP66 citations96
US5729663AMar 17, 1998
Method and apparatus for gray screening
XEROX CORP64 citations96
US5513282AApr 30, 1996
Method and apparatus for controlling the processing of digital image signals
XEROX CORP96 citations96
US6175427B1Jan 16, 2001
System and method of tonal correction of independent regions on a compound document
XEROX CORP57 citations95
US5237432AAug 17, 1993
Image scaling apparatus
XEROX CORP65 citations95
US6678414B1Jan 13, 2004
Loose-gray-scale template matching
XEROX CORP29 citations93
US6427030B1Jul 30, 2002
Method and system for image conversion utilizing dynamic error diffusion
XEROX CORP20 citations93
US6144775ANov 7, 2000
Method and system for storing error values for an image conversion process utilizing dynamic error diffusion
XEROX CORP43 citations93
US6122393ASep 19, 2000
Image input device and method for providing scanning artifact detection
XEROX CORP22 citations93
US5880857AMar 9, 1999
Error diffusion pattern shifting reduction through programmable threshold perturbation
XEROX CORP48 citations93
US5696601ADec 9, 1997
System and method for redistributing error values from an error diffusion process
XEROX CORP24 citations93
US5608821AMar 4, 1997
Method of high addressability error diffusion
XEROX CORP38 citations93
US5528384AJun 18, 1996
System and method for implementing fast high addressability error diffusion process
XEROX CORP26 citations93
US5327262AJul 5, 1994
Automatic image segmentation with smoothing
XEROX CORP55 citations93
US5274472ADec 28, 1993
High addressability image generator using pseudo interpolation of video and screen data
XEROX CORP41 citations93
US6683702B1Jan 27, 2004
Compact-dot reproduction of scanned halftone screens
XEROX CORP35 citations92
US6608701B1Aug 19, 2003
Compact high addressability rendering
XEROX CORP40 citations92
US6449396B1Sep 10, 2002
Compact rendering for processing binary high addressability images
XEROX CORP38 citations92
US6229923B1May 8, 2001
Method and system for classifying and processing of pixels of image data
XEROX CORP43 citations92
US5790211AAug 4, 1998
Platen cover for a digital document scanner with electrically switchable reflectance modes
XEROX CORP48 citations92
US5579418ANov 26, 1996
Image interpolation apparatus
XEROX CORP29 citations92
US5390029AFeb 14, 1995
Method for controlling the processing of digital image signals
XEROX CORP26 citations92
US5307180AApr 26, 1994
Method and apparatus for controlling the processing of digital image signals
XEROX CORP24 citations92
US4878119AOct 31, 1989
System for synchronizing integration pulses with integration signal in an asynchronous raster input scanner
XEROX CORP25 citations92
US5606648AFeb 25, 1997
Apparatus and method for modulating image signals in a high addressability printing machine
XEROX CORP21 citations91
US5787206AJul 28, 1998
Method and system for processing image information using expanded dynamic screening and error diffusion
XEROX CORP19 citations84
US4757389AJul 12, 1988
Calibration improvement with dither for a raster input scanner
XEROX CORP20 citations82
US7058350B2Jun 6, 2006
Copier or scanner platen cover with fluorescent coating
XEROX CORP9 citations74
US6411735B1Jun 25, 2002
Method and apparatus for distinguishing between noisy continuous tone document types and other document types to maintain reliable image segmentation
XEROX CORP7 citations74
US6347159B1Feb 12, 2002
Method and system for processing image information using screening and error diffusion
XEROX CORP10 citations74
US6252680B1Jun 26, 2001
Image input device and method for providing scanning artifact detection
XEROX CORP10 citations74
US6246781B1Jun 12, 2001
Image input device and method for providing scanning artifact detection
XEROX CORP8 citations74
US5223953AJun 29, 1993
Screening circuit for variable angle screening of image pixels
XEROX CORP7 citations74
US6304679B1Oct 16, 2001
Method and apparatus for implementing two-dimensional digital filters
XEROX CORP11 citations73
US6647144B2Nov 11, 2003
Detection and verification of scanning attributes
XEROX CORP9 citations72
US4746987AMay 24, 1988
Modulator control for automatically overcoming intensity variations in a laser scanner
XEROX CORP10 citations72
US4755813AJul 5, 1988
Screening circuit for screening image pixels
XEROX CORP6 citations63
US6125406ASep 26, 2000
Bi-directional packing data device enabling forward/reverse bit sequences with two output latches
XEROX CORP5 citations54