Inventor

SHU JOSEPH S

US22 patents

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

SHU JOSEPH S

SEIKO EPSON CORP

Multicolor and mixed-mode halftoning

Method and apparatus for processing a document by segmentation into text and image areas

Adaptive filtering and thresholding arrangement for reducing graininess of images

System and method for detecting the black and white points of a color image

Continuous-tone ink reduction

Method and apparatus for minimizing artifacts in images produced by error diffusion halftoning

Method and apparatus for dither array generation to reduce artifacts in halftoned image data utilizing ink reduction processing

Apparatus and method for improving black and color separation in halftoned images by printing black dots in a different screen phase

Method and apparatus for minimizing artifacts in images produced by error diffusion halftoning utilizing ink reduction processing

Method and apparatus for tonal correction in binary printing devices by predistortion of image data

Method and apparatus for dither array generation to reduce artifacts in halftoned images

Apparatus and method for enhancing color saturation in halftoned images

Method and apparatus for reducing artifacts in halftone images using gray balance correction

Error-diffusion-type half-toning employing adaptive thresholding for enhanced smoothness

Ink duty-cycle control

Method and apparatus for vivid color correction in binary printing devices

Method and apparatus for tonal correction in binary printing devices by predistortion of image data utilizing ink reduction processing

Banding and ink-bleeding reduction in cluster dither by screen displacement

On-line ink-duty reduction

NYNEX CORP

Reproduction of halftone original with reduced moire

Halftone reproduction with enhanced gray level reproducibility

Reproduction of halftone original with moire reduction and tone adjustment