Inventor
KNOX KEITH T
20 patents
Patents
20 patentsUS5734752AMar 31, 1998
Digital watermarking using stochastic screen patterns
XEROX CORP525 citations99
US7292365B2Nov 6, 2007
Methods and systems for determining distribution mean level without histogram measurement
XEROX CORP95 citations98
US6526155B1Feb 25, 2003
Systems and methods for producing visible watermarks by halftoning
XEROX CORP89 citations98
US5649073AJul 15, 1997
Automatic calibration of halftones
XEROX CORP106 citations98
US6128411AOct 3, 2000
Method for embedding one or more digital images within another digital image
XEROX CORP67 citations96
US6101283AAug 8, 2000
Show-through correction for two-sided, multi-page documents
XEROX CORP67 citations96
US5832137ANov 3, 1998
Show-through correction for two-sided documents
XEROX CORP50 citations96
US5646744AJul 8, 1997
Show-through correction for two-sided documents
XEROX CORP72 citations96
US6961157B2Nov 1, 2005
Imaging apparatus having multiple linear photosensor arrays with different spatial resolutions
XEROX CORP28 citations92
US6628843B1Sep 30, 2003
Image enhancement on JPEG compressed image data
XEROX CORP23 citations92
US6331860B1Dec 18, 2001
Method and apparatus for stitching scanned image segments together to form an oversized document
XEROX CORP37 citations92
US5668638ASep 16, 1997
Error diffusion method with symmetric enhancement
XEROX CORP34 citations92
US5317653AMay 31, 1994
Method for quantization gray level pixel data with application of under compensated error diffusion
XEROX CORP35 citations92
US4345313AAug 17, 1982
Image processing method and apparatus having a digital airbrush for touch up
XEROX CORP45 citations92
US4246614AJan 20, 1981
Binary graphic printer system having an electronic screen with shift control suited for rescreening
XEROX CORP34 citations92
US5790281AAug 4, 1998
Method of correcting the measured reflectance of an image acquired by an image acquisition device for the integrating cavity effect
XEROX CORP21 citations91
US6515764B1Feb 4, 2003
Method and apparatus for detecting photocopier tracking signatures
XEROX CORP19 citations88
US7145697B1Dec 5, 2006
Show-through compensation apparatus and method
XEROX CORP13 citations84
US4305650ADec 15, 1981
Illumination system
XEROX CORP16 citations74
US6958828B2Oct 25, 2005
Method and apparatus for detecting photocopier tracking signatures
XEROX CORP4 citations62