Method and apparatus for measuring and controlling the color of a moving
web
    53.
    发明授权
    Method and apparatus for measuring and controlling the color of a moving web 失效
    用于测量和控制移动幅材的颜色的方法和装置

    公开(公告)号:US4439038A

    公开(公告)日:1984-03-27

    申请号:US240171

    申请日:1981-03-03

    Abstract: Apparatus for measuring and controlling the color of a moving web in which a circular variable bandpass filter having a passband varying substantially continuously with angular displacement through the optical spectrum is interposed in the optical path between the web and a detector and is rotated to produce a detector output which periodically scans the optical spectrum. In one disclosed embodiment, the detector outputs at the various wavelengths are weighted to produce X, Y and Z tristimulus values while, in another disclosed embodiment, dye flows are so controlled as to minimize the total square error between the measured reflectance spectrum and the desired reflectance spectrum.

    Abstract translation: 用于测量和控制移动网的颜色的装置,其中具有通过光谱的角位移基本上连续变化的通带的圆形可变带通滤波器插入在幅材和检测器之间的光路中,并被旋转以产生检测器 周期性扫描光谱的输出。 在一个所公开的实施例中,将各种波长处的检测器输出加权以产生X,Y和Z三刺激值,而在另一个公开的实施例中,染色体流被如此控制,以使测得的反射光谱与期望的 反射光谱。

    Method and system for ascertaining a hue

    公开(公告)号:US11740130B2

    公开(公告)日:2023-08-29

    申请号:US17262655

    申请日:2019-07-11

    Inventor: Patrick Hübel

    CPC classification number: G01J3/463 G01J2003/467

    Abstract: The invention relates to a system and a method for ascertaining a color recipe which produces a color product with a specified hue after an application onto a specified substrate using a specified application method. The method has the steps of: a) providing a database with a plurality of data sets, b) specifying a target application method, a target substrate, and a desired target hue by means of a user, c) searching the database using a computer program, and d) when at least one suitable database has been found in step c), displaying the information stored in the at least one data set, said information relating to the color recipe, wherein at least one of the data sets also comprises information on at least one reference hue, a reference application method, and a reference substrate. The reference hue is produced when the color recipe to which information contained in the data set relates is applied onto the reference substrate using the reference application method, and the reference application method differs from the application method to which the information contained in the data set relates and/or the reference substrate differs from the substrate to which information contained in the data set relates.

    COLOR CHANNEL CORRELATION DETECTION
    58.
    发明公开

    公开(公告)号:US20230206503A1

    公开(公告)日:2023-06-29

    申请号:US17562777

    申请日:2021-12-27

    Abstract: Systems, apparatuses, and methods for performing color channel correlation detection are disclosed. A compression engine performs a color channel transform on an original set of pixel data to generate a channel transformed set of pixel data. An analysis unit determines whether to compress the channel transformed set of pixel data or the original set of pixel data based on performing a comparison of the two sets of pixel data. In one scenario, the channel transformed set of pixel data is generated by calculating the difference between a first pixel component and a second pixel component for each pixel of the set of pixel data. The difference is then compared to the original first pixel component for each pixel. If the difference is less than or equal to the original for a threshold number of pixels, then the analysis unit decides to apply the color channel transform prior to compression.

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