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    • 9. 发明授权
    • Method of and apparatus for extracting cross plane area of gamut and
computer program product for carrying out the extraction
    • 用于提取色域的横截面面积的方法和装置以及用于进行提取的计算机程序产品
    • US6075885A
    • 2000-06-13
    • US31040
    • 1998-02-26
    • Kazutaka TaniguchiAkihiro Nomura
    • Kazutaka TaniguchiAkihiro Nomura
    • G06K9/46G06K9/00
    • G06K9/46
    • The method of the present invention first provides a plurality of representative color points existing on the surface of a gamut (s20), and sets a plurality of boundary lines that connect the plurality of representative color points substantially along the surface of the gamut (s22). The method subsequently defines a plurality of unit faces that are respectively surrounded by at least three boundary lines and arranged substantially along the surface of the gamut (s24), and sets a color plane to cross the gamut (s26). The method successively selects cross boundary lines that cross the color plane among the plurality of boundary lines, determines intersections of the cross boundary lines and the color plane, selects unit faces that cross the color plane based on the selected cross boundary lines, specifies cross lines of the selected unit faces and the color plane by connecting the intersections, and joins the cross lines to extract a contour of a cross plane area obtained by causing the color plane to cross the gamut (s28). This structure enables the contour of a cross plane area, which is obtained by causing a color plane to cross the gamut, to be accurately extracted even when the color plane is arranged at any arbitrary position and in any arbitrary orientation.
    • 本发明的方法首先提供存在于色域表面上的多个代表性色点(s20),并且设置多个沿色域表面连接多个代表色点的边界线(s22) 。 该方法随后限定多个单元面,其分别由至少三个边界线围绕并且基本上沿着色域的表面布置(s24),并且设置色彩跨越色域(s26)。 该方法依次选择跨越多个边界线中的彩色平面的交叉边界线,确定交叉边界线和彩色平面的交叉点,基于所选择的交叉边界线选择与彩色平面交叉的单位面,指定交叉线 通过连接交叉点来选择单位面和彩色平面,并且连接交叉线以提取通过使色平面穿过色域获得的横截面区域的轮廓(s28)。 这种结构使得即使在彩色平面布置在任意任意位置和任意取向的情况下,通过使色面越过色域而获得的横截面区域的轮廓也被精确地提取。