Patent ID: 9253369
Filing Date: 2016-02-02
CPC Classification: G06K,H04N

Claim Text:
1. A halftone dot addition device for adding halftone dots to halftone dot images, the halftone dot addition device comprising: an empty circle information acquiring unit that obtains, in a Voronoi diagram having a generatrix corresponding to a halftone dot in a halftone dot image, the radius of an empty circle being a circle centering on a Voronoi vertex, and the empty circle passing through the generatrix but not internally including the generatrix; and a halftone dot addition unit that, if the radius of a target circle being the empty circle obtained, as a target, by the empty circle information acquiring unit is larger than a specific value, adds to the halftone dot image a halftone dot corresponding to a new generatrix, by adding the new generatrix to the inside of the target circle.