Inventor
SHU JOSEPH
US34 patents
⚠️ This page may combine multiple inventors who share the name “SHU JOSEPH”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SEIKO EPSON CORP
33 patentsUS6421142B1Jul 16, 2002
Out-of-gamut color mapping strategy
SEIKO EPSON CORP87 citations97
US6404511B1Jun 11, 2002
Self-calibration of network copier system
SEIKO EPSON CORP98 citations97
US6400843B1Jun 4, 2002
Color image reproduction with accurate inside-gamut colors and enhanced outside-gamut colors
SEIKO EPSON CORP81 citations97
US6233060B1May 15, 2001
Reduction of moiré in screened images using hierarchical edge detection and adaptive-length averaging filters
SEIKO EPSON CORP78 citations96
US6204939B1Mar 20, 2001
Color matching accuracy inside and outside the gamut
SEIKO EPSON CORP56 citations96
US5920682AJul 6, 1999
Multiple layer cluster dither matrix for reducing artifacts in printed images
SEIKO EPSON CORP58 citations96
US7031392B2Apr 18, 2006
Method and apparatus for video deblocking
SEIKO EPSON CORP23 citations92
US6522427B1Feb 18, 2003
Color table manipulations for contour reduction
SEIKO EPSON CORP35 citations92
US6181445B1Jan 30, 2001
Device-independent and medium-independent color matching between an input device and an output device
SEIKO EPSON CORP39 citations92
US6088512AJul 11, 2000
Void-and-cluster dither-matrix generation for better half-tone uniformity
SEIKO EPSON CORP24 citations92
US6064359AMay 16, 2000
Frame rate modulation for liquid crystal display (LCD)
SEIKO EPSON CORP42 citations92
US6031626AFeb 29, 2000
Color stochastic screening with optimal color dot placement
SEIKO EPSON CORP20 citations92
US5946454AAug 31, 1999
Image enhancement during half-toning using low-pass and high-pass filtering
SEIKO EPSON CORP27 citations92
US5905490AMay 18, 1999
Generating color-correction look-up-table addresses by multi-level half-toning
SEIKO EPSON CORP36 citations92
US5875287AFeb 23, 1999
Banding noise reduction for clustered-dot dither
SEIKO EPSON CORP20 citations92
US6765695B2Jul 20, 2004
Color processing architecture and algorithms for color laser printers
SEIKO EPSON CORP22 citations91
US6879733B2Apr 12, 2005
Image artifact removal technique for LCP
SEIKO EPSON CORP18 citations83
US6879734B2Apr 12, 2005
Memory efficient image artifact removal technique for LCP
SEIKO EPSON CORP12 citations82
US5838885ANov 17, 1998
Salt-and-pepper-noise reduction
SEIKO EPSON CORP20 citations81
US7623577B2Nov 24, 2009
Method and apparatus for video deblocking
SEIKO EPSON CORP7 citations74
US6185008B1Feb 6, 2001
Multilevel screening for color laser printer
SEIKO EPSON CORP6 citations74
US5963715AOct 5, 1999
Color stochastic screening with optimal color dot placement for display devices having arbitrary aspect ratios
SEIKO EPSON CORP12 citations74
US5822502AOct 13, 1998
Cluster dither ink duty limit control
SEIKO EPSON CORP10 citations74
US5768411AJun 16, 1998
Dispersed-dot dither with improved light-color smoothness
SEIKO EPSON CORP16 citations74
US7212315B2May 1, 2007
Mixed screen design for multi-mode document
SEIKO EPSON CORP9 citations73
US6842184B2Jan 11, 2005
Three dimensional stochastic screen for LCD and video
SEIKO EPSON CORP7 citations73
US6633412B1Oct 14, 2003
Smoothness enhancement in laser printing through periodic modulation of halftone cell
SEIKO EPSON CORP12 citations73
US7668366B2Feb 23, 2010
Mosaic image data processing
SEIKO EPSON CORP4 citations63
US7032987B2Apr 25, 2006
Nozzle scheduling for ink jet printing
SEIKO EPSON CORP5 citations63
US6097502AAug 1, 2000
Multilevel screening for color laser printer
SEIKO EPSON CORP3 citations63
US5802212ASep 1, 1998
Clustered-dot dither with white-fleck suppression
SEIKO EPSON CORP4 citations63
US7265876B2Sep 4, 2007
PWM rendering for color/gray-scale text and graphics for laser printer
SEIKO EPSON CORP2 citations61
US7460278B2Dec 2, 2008
3-Dimensional dot code for paper storage
SEIKO EPSON CORP0 citations52