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    • 11. 发明申请
    • COLOR SCREEN SETS
    • 彩色屏幕
    • US20120188611A1
    • 2012-07-26
    • US13011311
    • 2011-01-21
    • Omri ShachamJan AllebachMani FischerDoron ShakedCarl StaelinJin-Young KimYung-Yao Chen
    • Omri ShachamJan AllebachMani FischerDoron ShakedCarl StaelinJin-Young KimYung-Yao Chen
    • H04N1/405
    • H04N1/4058H04N1/52
    • A method for designing a screen set for color halftoning includes selecting a screen set that includes at least two screens. The screens are applied to a uniform color image so as to form a set of corresponding colorant halftones. The colorant halftones are superposed to form a color halftone. A spatial frequency spectrum of the color halftone is calculated. Maxima of the spatial frequency spectrum that occur at two effective frequencies are identified, the two effective frequencies being located in two adjacent quadrants of a complex spatial frequency space. A magnitude of each effective frequency is compared with a predetermined frequency magnitude. The screen set is accepted for future application for color halftoning only if both effective frequency magnitudes are greater than the predetermined frequency magnitude. Relating computer program product and data processing system are also disclosed.
    • 一种用于设计用于彩色半色调的屏幕组的方法包括选择包括至少两个屏幕的屏幕组。 将屏幕应用于均匀的彩色图像,以便形成一组相应的着色剂半色调。 将着色剂半色调叠加以形成彩色半色调。 计算颜色半色调的空间频谱。 识别在两个有效频率处发生的空间频谱的最大值,两个有效频率位于复数空间频率空间的两个相邻象限中。 将每个有效频率的大小与预定频率幅度进行比较。 仅当有效频率大于预定频率幅度时,屏幕组才被接受用于彩色半色调的将来应用。 还公开了关于计算机程序产品和数据处理系统。