Assignee
KEITHLEY DOUGLAS G
US27 patents
Top patents by PatentIndex Score
US8760725B1Jun 24, 2014
Tone dependent threshold perturbation error diffusion halftone
KEITHLEY DOUGLAS G10 citations84
US8237103B1Aug 7, 2012
Mechanical galvanometer tilt correction control
KEITHLEY DOUGLAS G4 citations74
US8630031B1Jan 14, 2014
Color adjustment for a scanned image
KEITHLEY DOUGLAS G4 citations73
US9678334B1Jun 13, 2017
Oscillating mirror line based image transformation
KEITHLEY DOUGLAS G2 citations70
US8436883B1May 7, 2013
Systems and methods for laser spacing compensation in laser printing devices
KEITHLEY DOUGLAS G5 citations69
US8760714B1Jun 24, 2014
Color space conversion
KEITHLEY DOUGLAS G2 citations63
US8681381B1Mar 25, 2014
Pixel stacking avoidance error diffusion halftone
KEITHLEY DOUGLAS G3 citations63
US8587625B2Nov 19, 2013
Laser printer with reduced banding artifacts
KEITHLEY DOUGLAS G2 citations63
US8289599B1Oct 16, 2012
Mechanical galvanometer tilt correction
KEITHLEY DOUGLAS G2 citations63
US8284411B1Oct 9, 2012
Faster monochrome printing for in-line electrophotographic color printers
KEITHLEY DOUGLAS G1 citations63
US8085287B2Dec 27, 2011
Laser printer with reduced banding artifacts
KEITHLEY DOUGLAS G3 citations63
US8120632B1Feb 21, 2012
Allignment of color planes in multi-beam multi-pass printers
KEITHLEY DOUGLAS G2 citations60
US8976417B2Mar 10, 2015
Dither-synchronized image scanning
KEITHLEY DOUGLAS G0 citations52
US8953907B2Feb 10, 2015
Modified bicubic interpolation
KEITHLEY DOUGLAS G0 citations52
US8582187B1Nov 12, 2013
Method and apparatus for reducing a color fringe
KEITHLEY DOUGLAS G1 citations52
US8553304B1Oct 8, 2013
Mechanical galvanometer tilt correction
KEITHLEY DOUGLAS G0 citations52
US8537424B1Sep 17, 2013
On-the-fly halftone image generation
KEITHLEY DOUGLAS G1 citations52
US8462363B1Jun 11, 2013
Faster monochrome printing for in-line electrophotographic color printers
KEITHLEY DOUGLAS G0 citations52
US8339689B1Dec 25, 2012
Exposure correction for scanners
KEITHLEY DOUGLAS G0 citations52
US8233196B1Jul 31, 2012
Halftoner block employing average values and shifts
KEITHLEY DOUGLAS G0 citations52
US8194282B2Jun 5, 2012
Image forming apparatus for identifying undesirable toner placement
KEITHLEY DOUGLAS G0 citations52
US8135229B1Mar 13, 2012
Image processing method and device
KEITHLEY DOUGLAS G0 citations52
US8098252B2Jan 17, 2012
Parallel video processing architecture
KEITHLEY DOUGLAS G0 citations52
US8643661B1Feb 4, 2014
Non raster row pixel processing
KEITHLEY DOUGLAS G1 citations51
US8306363B2Nov 6, 2012
Methods and systems for image scaling
KEITHLEY DOUGLAS G0 citations51
US8432424B1Apr 30, 2013
Alignment of color planes in multi-beam multi-pass printers
KEITHLEY DOUGLAS G0 citations49
US8390868B1Mar 5, 2013
Systems and methods for memory reduction for print head data buffering
KEITHLEY DOUGLAS G0 citations42