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    System and method to calibrate color measurement devices
    156.
    发明授权
    System and method to calibrate color measurement devices 有权

    公开(公告)号：US11733099B2

    公开(公告)日：2023-08-22

    申请号：US16668879

    申请日：2019-10-30

    Applicant: DATACOLOR INC.

    Inventor： Zhiling Xu

    IPC: G01J3/52 ,  G06N3/08 ,  G01J3/00 ,  G01J3/46 ,  G01J3/50 ,  G06N20/00

    CPC classification number: G01J3/524 ,  G01J3/00 ,  G01J3/46 ,  G01J3/463 ,  G06N3/08 ,  G01J3/462 ,  G01J3/501 ,  G06N20/00

    Abstract: A system including a processor and a memory configured to store code executed by the processor is provided. In one or more implementations, the processor is configured by the code to calibrate measurements made by color measurement devices. In one particular implementation, the processor receives a measurement dataset of one or more color values, for a sample obtained by a color measurement device. The processor is configured to convert the measurement dataset to a standard space measurement dataset using a standard space measurement model and calculate a color dataset based on the standard space measurement dataset using a color conversion model. The processor is further configured to output the calculated color dataset to at least one of a display, database or local memory store.

    SPECTRAL CHARACTERISTIC OBTAINING APPARATUS, IMAGE FORMING APPARATUS, AND IMAGE FORMING SYSTEM
    157.
    发明申请
    SPECTRAL CHARACTERISTIC OBTAINING APPARATUS, IMAGE FORMING APPARATUS, AND IMAGE FORMING SYSTEM 审中-公开

    公开(公告)号：US20190230254A1

    公开(公告)日：2019-07-25

    申请号：US16250375

    申请日：2019-01-17

    Applicant: Yusuke TANEDA ,  Kohei SHIMBO ,  Yoichi KUBOTA

    Inventor： Yusuke TANEDA ,  Kohei SHIMBO ,  Yoichi KUBOTA

    IPC: H04N1/60 ,  H04N1/00

    CPC classification number: H04N1/6097 ,  G01J3/52 ,  G01J3/524 ,  H04N1/00689 ,  H04N1/00692 ,  H04N1/00726 ,  H04N1/00734 ,  H04N1/603 ,  H04N1/6055

    Abstract: A spectral characteristic obtaining apparatus includes a color information obtaining unit including a plurality of spectral sensors aligned in an array direction, the spectral sensors being configured to receive light reflected from an object so as to obtain first color information of the object; a spectral characteristic calculating unit configured to estimate a spectral characteristic of the object based on the first color information by using a preset transformation matrix; a calibration color index configured to include a region of a color with a known spectral characteristic; and a transformation matrix calibrating unit configured to calibrate the transformation matrix by using second color information obtained from the calibration color index, wherein the spectral sensors are configured to obtain the second color information from the same region included in the calibration color index, while relative positions thereof with respect to the calibration color index are changed at a time of calibration.

    Optical Module And Electronic Apparatus
    158.
    发明申请
    Optical Module And Electronic Apparatus 审中-公开

    公开(公告)号：US20190023023A1

    公开(公告)日：2019-01-24

    申请号：US16037875

    申请日：2018-07-17

    Applicant: Seiko Epson Corporation

    Inventor： Satoshi OGUCHI

    IPC: B41J2/21 ,  B41J29/393

    CPC classification number: B41J2/2135 ,  B41J29/393 ,  G01J3/0205 ,  G01J3/0216 ,  G01J3/0232 ,  G01J3/42 ,  G01J3/524

    Abstract: An optical module includes: a measuring device including a measuring portion that measures light reflected at a measurement position of a measurement target, a light source that radiates light onto the measurement position in a direction crossing a measurement optical axis oriented from the measurement position to the measuring portion, and a window through which light incident on the measuring portion passes; and a shutter that opens and closes the window of the measuring device. The shutter is provided with a reference object disposed closer to the measuring portion side than the measurement position on the measurement optical axis, on a face of the shutter facing the measuring portion when closing the window, and the optical module includes a light guide that guides the light from the light source to the reference object when the window is closed by the shutter.

    SYSTEM AND METHOD FOR CALIBRATING A LINEAR ARRAY
    159.
    发明申请
    SYSTEM AND METHOD FOR CALIBRATING A LINEAR ARRAY 审中-公开

    公开(公告)号：US20190020788A1

    公开(公告)日：2019-01-17

    申请号：US15651574

    申请日：2017-07-17

    Applicant: Xerox Corporation

    Inventor： Stuart A. Schweid ,  Michael B. Monahan ,  Robert P. Herloski ,  Martin E. Hoover

    IPC: H04N1/60 ,  G01J3/52 ,  H04N1/32

    CPC classification number: H04N1/6033 ,  G01J3/28 ,  G01J3/462 ,  G01J3/465 ,  G01J3/524 ,  H04N1/32523 ,  H04N1/4076 ,  H04N1/486 ,  H04N1/6058 ,  H04N17/02

    Abstract: A method of balancing responses of a plurality of sensor chips arranged generally in a linear array comprising: exposing the plurality of sensor chips to an absence of illumination; measuring a dark response of each photosensor of a plurality of photosensors; positioning a calibration piece within a field of view of the plurality of sensor chips other than a calibration sensor chip; illuminating a calibration standard and the calibration piece with a light source; measuring a light response of each photosensor of the plurality of photosensors; applying an offset to the light response of each photosensor of the plurality of photosensors by subtracting the dark response of each photosensor of the plurality of photosensors to obtain an offset light response for each photosensor of the plurality of photosensors; calculating a mean offset light response for each sensor chip of the plurality of sensor chips by averaging the offset light response for each photosensor of the plurality of photosensors in each sensor chip of the plurality of sensor chips; calculating a modified light response for each photosensor of the plurality of photosensors by modifying the offset light response for each photosensor of the plurality of photosensors based on the mean offset light response of the sensor chip comprising the respective photosensor, the mean offset light response of the calibration sensor chip, an initial mean offset light response of the sensor chip comprising the respective photosensor, and an initial mean offset light response of the calibration sensor chip; and, applying a first gain to the offset light response of each photosensor of the plurality of photosensors based on the modified light response of each respective photosensor to obtain a corrected light response of each photosensor of the plurality of photosensors.

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