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A Color Gamut Determination Method for Color Devices Based on 3D Incremental Convex Hull Method

A technology for determining the color of a device and a device, applied in image communication, electrical components, etc., can solve the problems of easy introduction of wrong sample boundary points, insufficient accuracy, and poor scalability, and achieve the effect of improving color reproduction accuracy.

Inactive Publication Date: 2017-05-03
XIAN UNIV OF TECH
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Problems solved by technology

[0007] The purpose of the present invention is to provide a method for determining the color gamut of a color device based on the three-dimensional incremental convex hull method, which solves the problems in the prior art that the scalability is not strong, or the amount of calculation is large, and it is easy to introduce wrong sample boundary points, so that The problem of insufficient precision

Method used

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  • A Color Gamut Determination Method for Color Devices Based on 3D Incremental Convex Hull Method
  • A Color Gamut Determination Method for Color Devices Based on 3D Incremental Convex Hull Method
  • A Color Gamut Determination Method for Color Devices Based on 3D Incremental Convex Hull Method

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[0029] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0030] refer to figure 1 , is the conflict graph involved in the method of the present invention, specifically:

[0031] For each small plane f of the current convex hull CH(Pr), a set must be maintained This subset consists of those points that are visible to the plane f. Conversely, for each point pt(t>r), a set Fconflict(pt) is also maintained, which is composed of all facets visible to point pt in CH(Pr). The point p∈Pconflict(f) conflicts with the plane f, because the point p and the plane f cannot "peacefully" get along in the convex hull, that is, once a point p∈Pconflict(f) is added to the convex hull, The plane f must be deleted. Therefore Pconflict(f) and Fconflict(pt) are referred to as a conflict list (conflict list) hereinafter referred to as graph G.

[0032] The method for determining the color gamut of a color device b...

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Abstract

The invention discloses a color equipment color gamut determination method based on a three-dimensional increment convex hull method. The color equipment color gamut determination method includes the following steps that four non-coplanar points are found out in a set S to constitute a tetrahedron; a point set C of a current convex hull is initialized; a random arrangement of the remaining points is freely selected and a conflict tabular drawing G is initialized; a non-accessed point Pr is selected and inserted into the point set C; the boundary of a conflict set of the point Pr is worked out and is the horizon; each edge in the horizon is added to an ordered list L; a new triangular face f' is generated for each edge e belonging to L, and if f' and an adjacent face f'' of the edge e are located in the same plane, the two faces are combined, and the last step is executed; if f' and the adjacent face f'' are non-coplanar, a conflict set of a face f1 and a conflict set of a face 2 are combined to obtain P(e); as for each P' belonging to P(e), the conflict relation between f' and P' is checked, and (P', f) is added to the drawing G if P' is visible; related content in the drawing G is deleted, and returning to the point set C is executed. The steps of the color equipment color gamut determination method are concise and results are accurate.

Description

technical field [0001] The invention belongs to the technical field of three-dimensional color gamut processing of color equipment, and relates to a method for determining the color gamut of color equipment based on a three-dimensional incremental convex hull method. Background technique [0002] Before the color gamut mapping is performed, the boundary of the device color gamut needs to be determined according to the statistical characteristics of the device color gamut, and the accuracy of the description of the color gamut boundary directly affects the accuracy of color reproduction, so a method that can accurately describe the color gamut boundary must be used . [0003] At present, the methods of color gamut extraction are roughly divided into two categories, namely analytical method and discrete method. [0004] There are two relatively classical algorithms for the analytical method: the color gamut analytical model based on the Neugebauer equation and the deformed he...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N1/60
CPCH04N1/60
Inventor 孙帮勇李文莉
Owner XIAN UNIV OF TECH
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