Inventor

METCALFE DAVID J

US43 patents

⚠️ This page may combine multiple inventors who share the name “METCALFE DAVID J”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

METCALFE DAVID J

XEROX CORP

Fast efficient window region coalescing in a two-pass auto-windowing environment

Detection and elimination of scanning artifacts

Hybrid error diffusion pattern shifting reduction using programmable threshold perturbation

System and method for missing inkjet compensation in a multi-level inkjet printer

Architecture for analog and digital image sensor arrays

Method and system for image conversion utilizing dynamic error diffusion

Method and system for storing error values for an image conversion process utilizing dynamic error diffusion

Method and system for hybrid error diffusion processing of image information using programmable screen modulation

Error diffusion pattern shifting reduction through programmable threshold perturbation

System and method for redistributing error values from an error diffusion process

High-speed output of video image data from an array of photosensors

Method of high addressability error diffusion

System and method for implementing fast high addressability error diffusion process

Method and system for hybrid error diffusion processing of image information using adaptive white and black reference values

Method and system for processing image information using video dependent dampened screening and error diffusion

Method and system for hybrid error diffusion processing of image information using dynamic screens based on brightness/darkness settings

System and method for providing dynamic noise profile selection for hybrid and error diffusion image processing

System and apparatus for tonal reproduction curve adjustment in a hybrid error diffusion process

Method and system for processing image information using expanded dynamic screening and error diffusion

System and apparatus for single subpixel elimination with local error compensation in a high addressable error diffusion process

System and apparatus for single subpixel elimination with local error compensation in an high addressable error diffusion process

Method and system for processing image information using screening and error diffusion

System and apparatus for single subpixel elimination with local error compensation in an high addressable error diffusion process

Method and system for processing image information using background error diffusion

System and apparatus for single subpixel elimination in an high addressable error diffusion process

Methods for operating printhead inkjets to attenuate ink drying in the inkjets during printing operations

System and method for generation of non-firing electrical signals for operation of ejectors in inkjet printheads

System and method for estimating ink usage in an inkjet printer

Architecture for color space transformation to compensate for relative chip-to-chip spectral variations on a butted full-width array sensor bar

Vectorized two stage tile-based scaling

Methods and systems for processing low resolution images via error diffusion

System and method for high speed inoperative inkjet compensation

Edge transition detection in a high-addressable error diffusion environment

Fiducial artifact detection and compensation algorithm

System and method to detect and adjust image background

Dynamic compression acceleration using real-time image data entropy analysis

System for replacing a portion of an image data stream in an ink jet printer

System and method to detect, suppress, and modify background regions of scanned documents

System and method for processing and enhancing achromatic characters of scanned digital documents

Re-ordered error diffusion for fast implementation

System and method for control of inkjets in inkjet printers

CAMPBELL JAMES B

Neutral pixel correction for proper marked color printing

LI XING

Color printing reducing artifacts and banding by rendering black dots, replacing dots with process black, and adding non-black dots for different subsets of black dots