Inventor

WU CHAI WAH

US61 patents

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

WU CHAI WAH

IBM

System for protection of goods against counterfeiting

Method and system for authenticating objects and object data

System for protection of goods against counterfeiting

Hand held telephone set with separable keyboard

Method and apparatus to correct distortion of document copies

Method and apparatus for producing duplication- and imitation-resistant identifying marks on objects, and duplication- and duplication- and imitation-resistant objects

Method and apparatus for remote commerce with customer anonymity

Method and apparatus for adjusting subpixel intensity values based upon luminance characteristics of the subpixels for improved viewing angle characteristics of liquid crystal displays

Secured signal modification and verification with privacy control

System and method for three-dimensional geometric modeling by extracting and merging two-dimensional contours from CT slice data and CT scout data

System and method for acquiring three-dimensional data subject to practical constraints by integrating CT slice data and CT scout images

Cryptography-based low distortion robust data authentication system and method therefor

Model based error diffusion with correction propagation

Secured signal modification and verification with privacy control

Dithering masks with very large periods

Synchronization-based communication systems

Clustered aperiodic mask

Semiotic system and method with privacy protection

System and method for accessing the three-dimensional geometry of large objects using X-ray based method subject to limitations on radiation doses

Printer dependent descreening method

Distributed charging of electrical assets

Method and system for error diffusion with a plurality of error measures

Multicell clustered mask with blue noise adjustments

Microlocal calibration of digital printers

Method and apparatus to correct distortion of document copies

Method, system, program, and data structures for halftoning with line screens having different lines per inch (LPI)

Optimization with unknown objective function

Printer independent halftone image rendering

Multimedia conferencing system for determining participant engagement

Achieving buyer-seller anonymity for unsophisticated users under collusion amongst intermediaries

Method and system for data hiding and authentication via halftoning and coordinate projection

Target patterns controlled error management

Target patterns controlled error management

Hardware acceleration for computing eigenpairs of a matrix

Eigenvalue decomposition with stochastic optimization

Analog hardware matrix computation

INFOPRINT SOLUTIONS CO LLC

Detecting and compensating for color misregistration produced by a color scanner

Method and apparatus for controlling a spot function for digital halftoning

Method and system for designing multilevel halftone screens using spot functions

Bandless halftone design for multiple beam printers employing non-orthogonal halftones

Methods and apparatus for generating dither mask through interpolation between preferred patterns

Generating threshold values in a dither matrix

CHANDU KARTHEEK

Halftone calibration mechanism employing an ink model

Hybrid halftone generation mechanism using change in pixel error

Print head alignment mechanism

Mechanism for generating a hybrid halftone using a DMSSA screen

Halftone mechanism

ERNST LARRY M

Method and system for scaling with dot gain control

DETTORI PAOLO

Resource allocation in peer-to-peer streaming

FU ZHENGHUA

Method and system for improving content diversification in data driven P2P streaming using source push