Inventor

FAN ZHIGANG

US219 patents

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

FAN ZHIGANG

XEROX CORP

Variable data differential gloss images

Method and apparatus for segmenting data to create mixed raster content planes

Systems and methods for reducing boundary artifacts in hybrid compression

Image segmentation system

Segmentation-based JPEG image artifacts reduction

Method of estimating at least one run-based font attribute of a group of characters

Apparatus and method for segmenting and classifying image data

Method for moire-free color halftoning using non-orthogonal cluster screens

Digital imaging method and apparatus for detection of document security marks

Method and apparatus for segmenting data to create mixed raster content planes

Filter for producing continuous tone images from halftone digital images data

Line and curve detection using local information

Detection and rendering of text in tinted areas

Method and apparatus for wavelet-based universal halftone image unscreening

Anti-counterfeit pattern detector and method

Decompression of standard ADCT-compressed document images

Image processing system and method employing hybrid filtering to provide improved reconstruction of continuous tone images from halftone screen-structured images

Image processing system and method with improved reconstruction of continuous tone images from halftone images including those without a screen structure

Gamut selection in multi-engine systems

Apparatus and method for segmenting and classifying image data

Method for counterfeit currency detection using orthogonal line comparison

Methods for determining font attributes of characters

System and method for image based control using inline sensors

Embedding information in images using two-layer conjugate screening

Watermarked image generator and method of embedding watermarks into an input image

Method and apparatus for implementing anti-counterfeiting measures in personal computer-based digital color printers

Anti-counterfeiting see-through security feature using line patterns

Image type classification using edge features

Background-based image segmentation

Method of detecting changes occurring in image editing using watermarks

Soft picture/graphics classification system and method

Color halftoning using a single successive-filling halftone screen

Adaptive filtering method and apparatus for descreening scanned halftoned image representations

Method and apparatus for classifying images and/or image regions based on texture information

Line and curve detection using local information

Fuzzy black color conversion using weighted outputs and matched tables

Method of error diffusion using 2×2 color correction and increment matching

Multi-resolution neutral color detection

Error diffusion for color images with semi-vector quantization

System for converting color image signals having high-frequency components from RGB to CMY color spaces

Image editing system and method having improved automatic object selection

Balanced error diffusion system

Method combining error diffusion and traditional halftoning with arbitrary screen orientation

Iterative error diffusion system

Method for quantization gray level pixel data with extended distribution set

FAN ZHIGANG

License plate character segmentation using likelihood maximization

Method and system for identifying a license plate

CUTTING EDGE PRODUCTS INC

Electric stun gun

BALA RAJA

Finding text in natural scenes

VENABLE DENNIS L

Punched hole detection and removal