Resources Contact Us Home
Halftoning for hi-fi color inks

Image Number 4 for United States Patent #6307645.

In a hi-fi color printing system, an inverted halftone screen is provided having the same angle and frequency as a halftone screen for an opposing color. The dots of the inverse halftone screen are configured to be located midway between the centers of the dots of the half-tone screen. The halftone screen and inverted halftone screen are used in the printing process to extend the gamut of colors within a printing system, render improved neutral colors, and provide an improved transition through neutral regions of color space. The present invention allows for additional printing of multiple colors without the need for increasing the number of screens used in the image processing system.

  Recently Added Patents
Field-programmable analog array with memristors
Layout design defect repair based on inverse lithography and traditional optical proximity correction
Navigating applications using side-mounted touchpad
Use of natural query events to improve online advertising campaigns
Distortion compensation device, distortion compensation method, and radio transmitter
Monitoring and correcting upstream packet loss
  Randomly Featured Patents
Method for manufacturing conductive element substrate, conductive element substrate, method for manufacturing liquid crystal display, liquid crystal display and electronic information equipmen
Generalized switched-capacitor active filter
Zoom lens and optical apparatus
Non-uniform multi-beam satellite communications system and method
Treatment of contaminated waste waters and groundwaters with photolytically generated hydrated electrons
Fiberoptic casing for endoscopes and method of making
Game card writing instrument
Lighting fixture
Hysteretic switching regulator and control method used therein