Patent ID: 9083925
Filing Date: 2015-07-14
Classification: H04N

Abstract:
1. A color processing method of performing image processing for an image recording apparatus which records an image by arranging, on a recording medium, dots of a plurality of types of dot structures having different arrangements of color materials to be used, comprising the steps of: generating a dot arrangement signal which corresponds to an input color signal and represents an arrangement of dots of the plurality of types of dot structures; and outputting image data which arranges dots of the plurality of types of dot structures on a recording medium based on the dot arrangement signal, wherein, in a case where a set of dot structures recordable by the image recording apparatus is defined as a set A, a set of color points corresponding to the respective dot structures of the set A is defined as a set B, a polyhedron forming a convex hull of the color points of the set B in a color space is defined as a polyhedron C, a set of polygons forming a surface of the polyhedron C is defined as a set D, and a set of dot structures in which color points are positioned on the polygons of the set D out of the dot structures of the set A is defined as a set E, the dot arrangement signal out of the dot arrangement signals that corresponds to a color signal value representing a color capable of output on a gamut boundary represents an arrangement of dot structures serving as a subset of the set E.