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    Image processing apparatus, image processing method, and computer-readable medium
    5.
    发明授权
    Image processing apparatus, image processing method, and computer-readable medium 有权

    公开(公告)号：US11785169B2

    公开(公告)日：2023-10-10

    申请号：US17400685

    申请日：2021-08-12

    Applicant: Yuki Matsushima

    Inventor： Yuki Matsushima

    IPC: H04N1/60

    CPC classification number: H04N1/6022 ,  H04N1/605 ,  H04N1/6058

    Abstract: An image processing apparatus includes: an acquisition unit configured to acquire a plurality of first color values in a device independent color space, from information defining a predetermined gamut; a setting unit configured to set predetermined first dot percentages of a fluorescent color for the plurality of first color values acquired by the acquisition unit; a calculation unit configured to calculate a second dot percentage of the fluorescent color, based on a relationship between the plurality of first color values and the first dot percentages, the second dot percentage corresponding to an arbitrary second color value in the color space; and a generation unit configured to generate a first profile to convert the second color value to dot percentages of a process color and the fluorescent color, based on the second color value and the second dot percentage calculated by the calculation unit.

    COLOR SPACE INK MODEL GENERATION MECHANISM
    6.
    发明公开
    COLOR SPACE INK MODEL GENERATION MECHANISM 审中-公开

    公开(公告)号：US20230283739A1

    公开(公告)日：2023-09-07

    申请号：US17686522

    申请日：2022-03-04

    Applicant: Ricoh Company, Ltd.

    Inventor： Mikel Stanich ,  Pallavi Premkumar ,  James Chauvin ,  Nikita Gurudath

    IPC: H04N1/60 ,  B41J29/393

    CPC classification number: H04N1/6058 ,  B41J29/393 ,  B41J2/04536

    Abstract: A printing system is disclosed. The printing system includes at least one physical memory device to store ink model estimation logic and one or more processors coupled with the at least one physical memory device to execute the ink model estimation logic to receive a first plurality of ink deposition curves each associated with one of a plurality of primary color inks of a print system, wherein the associated primary color inks in combination represent a first secondary color, receive a color space mapping profile for the print system, wherein the color space mapping profile characterizes a relationship between a first color space and a printer color space of the print system and generate a color space ink model for the first secondary color based on the first plurality of ink deposition curves and the color space mapping profile, wherein the color space ink model represents a relationship between each of a plurality of parameters of the first color space and ink deposition.

    SYSTEM AND METHOD FOR CALIBRATING A LINEAR ARRAY
    7.
    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.

    COLOUR CONVERSION
    9.
    发明申请
    COLOUR CONVERSION 审中-公开

    公开(公告)号：US20180300862A1

    公开(公告)日：2018-10-18

    申请号：US15924455

    申请日：2018-03-19

    Applicant: Sony Corporation

    Inventor： Stephen Mark KEATING

    IPC: G06T5/00 ,  H04N1/60

    CPC classification number: G06T5/009 ,  G06T2207/10024 ,  H04N1/6058 ,  H04N1/6075

    Abstract: Colour conversion apparatus comprises mapping circuitry configured to map pixels of an input image having colour components in an input colour space to pixels of an mapped image having colour components in an output colour space, the input colour space and the output colour space being different colour spaces such that at least a subset of colours representable in the input colour space are not representable in the output colour space; the mapping circuitry being configured to: convert pixels from the input colour space to an intermediate colour space in which a colour space representation of hue approximates to a consistent perceived hue independent of brightness and/or saturation; map pixels in the intermediate colour space which lie outside a region of the intermediate colour space corresponding to representable colours in the output colour space to generate mapped pixels so that the mapped pixels lie within that region, by varying the brightness and/or saturation of those pixels in the intermediate colour space but leaving the hue of those pixels substantially unchanged; and convert the mapped pixels from the intermediate colour space to the output colour space.

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