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
5-phenyl-pentanoic acid derivatives as matrix metalloproteinase inhibitors for the treatment of asthma and other diseases
Tiered cost model for access to a computer network
Organic light-emitting display and method of manufacturing the same
Crystal structure of human JAK3 kinase domain complex and binding pockets thereof
Headset, terminal, and method capable of switching headset mode
Techniques for generating and displaying a visual flow of user content through a social network
  Randomly Featured Patents
Manufacturing method, including near-field optical microscopic examination of a magnetic bit pattern
Flame retardant compositions
Polycarbonate/aromatic polyester blends containing an olefinic modifier
Enzymatic process for the preparation of (S)-cyanohydrins
Convertible A-frame cart
Cluster storage using subsegmenting for efficient storage
Method for mapping of dispersion and other optical properties of optical waveguides
Non leak check valve typed traction control valve
Process and apparatus for adjustment of the angular position of a part in rotational motion
Strip-line for propagating microwave energy