Hp Indigo B.v.

Hewlett-Packard Development Company, L.p.

Purdue Research Foundation

Yotam Ben-Shoshan

Tal Frank

Oren Haik

Dror Kella

Boaz Tagansky

Ram Dagan

Marina Limonov

Robert Alan Ulichney

Jan Philip Allebach

Altyngul Jumabayeva

Shay Bornstein

In an example, a method includes determining, using a processor, a first halftone screen comprising a plurality of cells. Each of the cells may contain a predetermined pixel cluster pattern, and a centre position of a cluster pattern within a first cell may be different to a centre position of a cluster pattern within a second cell.

Halftone screens comprising cluster patterns having different centre positions

Certain examples described herein relate to the halftoning of a color image. In one example, a set of clusters are determined based on the color image. A set of edges are also detected in the color images. Clusters within these edges are then merged. A set of screens for halftoning are assigned to the set of clusters. This assignment is based on color property metrics for the set of clusters. The color image is halftoned using the set of screens assigned to the merged clusters.

Assigning halftone screens to clustered image portions based on color and content

A halftone comprises a first halftone screen and a second halftone screen. The first halftone screen comprises a first plurality of amplitude modulated dots arranged according to a first plurality of rows, the first plurality of rows being orientated according to a first direction and comprising a first dot spacing. The second halftone screen comprises a second plurality of amplitude modulated dots arranged according to a second plurality of rows, the second plurality of row being orientated in a second direction and comprising a second dot spacing. The first direction and the second direction define an angle of 45 degrees or less and a ratio of the second dot spacing to the first dot spacing is less than one.

Generating halftones

Growing community of inventors

Ness Ziona, Israel

Yotam Ben-Shoshan