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    System and method for computing color correction coefficients
    2.
    发明授权
    System and method for computing color correction coefficients 有权
    用于计算颜色校正系数的系统和方法

    公开(公告)号：US07737989B2

    公开(公告)日：2010-06-15

    申请号：US11588921

    申请日：2006-10-27

    Applicant: Gregory S. Pettitt ,  Rajeev Ramanath

    Inventor： Gregory S. Pettitt ,  Rajeev Ramanath

    IPC: G09G5/00 ,  G09G5/02 ,  H04N9/04 ,  H04N5/74 ,  H04N9/28 ,  G03F3/08 ,  G06K9/00 ,  G06K9/40 ,  G06K9/36 ,  H04N1/46

    CPC classification number: G09G5/06 ,  G01J3/027 ,  G01J3/46 ,  G01J3/462 ,  G01J3/50 ,  G01J3/506 ,  G01J3/524 ,  G09G3/001 ,  G09G2320/0242

    Abstract: System and method for computing coefficients for color correcting rendered colors used in displaying images. A preferred embodiment comprises measuring color values of light output for a display system, receiving color values of desired colors, and computing a color correction matrix based on the measured color values and the input color values. The color correction matrix may be used to modify color commands to a light engine of the display system. The modifications to the color commands permit the storage and use of a set of color commands designed for a reference display system, simplifying display system design and manufacture.

    Abstract translation: 用于计算用于显示图像的颜色校正渲染颜色的系数的系统和方法。 优选实施例包括测量显示系统的光输出的颜色值，接收所需颜色的颜色值，以及基于测量的颜色值和输入颜色值来计算颜色校正矩阵。 颜色校正矩阵可以用于将颜色命令修改到显示系统的光引擎。 对颜色命令的修改允许存储和使用为参考显示系统设计的一组颜色命令，从而简化显示系统设计和制造。

    System and method for computing color correction coefficients
    3.
    发明申请
    System and method for computing color correction coefficients 有权
    用于计算颜色校正系数的系统和方法

    公开(公告)号：US20080100639A1

    公开(公告)日：2008-05-01

    申请号：US11588921

    申请日：2006-10-27

    Applicant: Gregory S. Pettitt ,  Rajeev Ramanath

    Inventor： Gregory S. Pettitt ,  Rajeev Ramanath

    IPC: G09G5/02

    CPC classification number: G09G5/06 ,  G01J3/027 ,  G01J3/46 ,  G01J3/462 ,  G01J3/50 ,  G01J3/506 ,  G01J3/524 ,  G09G3/001 ,  G09G2320/0242

    Abstract: System and method for computing coefficients for color correcting rendered colors used in displaying images. A preferred embodiment comprises measuring color values of light output for a display system, receiving color values of desired colors, and computing a color correction matrix based on the measured color values and the input color values. The color correction matrix may be used to modify color commands to a light engine of the display system. The modifications to the color commands permit the storage and use of a set of color commands designed for a reference display system, simplifying display system design and manufacture.

    Abstract translation: 用于计算用于显示图像的颜色校正渲染颜色的系数的系统和方法。 优选实施例包括测量显示系统的光输出的颜色值，接收所需颜色的颜色值，以及基于测量的颜色值和输入颜色值来计算颜色校正矩阵。 颜色校正矩阵可以用于将颜色命令修改到显示系统的光引擎。 对颜色命令的修改允许存储和使用为参考显示系统设计的一组颜色命令，从而简化显示系统设计和制造。

    Apparatus and method for decoding extended color space data
    4.
    发明授权
    Apparatus and method for decoding extended color space data 有权
    用于解码扩展颜色空间数据的装置和方法

    公开(公告)号：US08411206B2

    公开(公告)日：2013-04-02

    申请号：US11965671

    申请日：2007-12-27

    Applicant: Gregory S. Pettitt ,  Rajeev Ramanath

    Inventor： Gregory S. Pettitt ,  Rajeev Ramanath

    IPC: H04N7/173 ,  H04N5/46 ,  G09G5/00 ,  G06K9/00 ,  H04N9/64

    CPC classification number: H04N9/67 ,  H04N5/202 ,  H04N9/69

    Abstract: In one embodiment, an image decoding system for a YCbCr formatted signal includes a color space converter capable of representing an RGB image signal with one or two negative image signal components. The image decoding system further includes a degamma correction unit and an image signal formatter. An offset of the image black level from zero corresponding to the image signal offset produced by the color space converter is employed to perform degamma correction. In a further embodiment, gain, offset, and sign are removed from the image signal produced by the color space converter prior to degamma correction. The image signal formatter may utilize a one-dimensional and a three-dimensional lookup table to produce an image signal that may include secondary and white image components. The system advantageously accommodates decoding xvYCC-encoded image data in conventional as well as new hardware display system architectures.

    Abstract translation: 在一个实施例中，用于YCbCr格式化信号的图像解码系统包括能够用一个或两个负图像信号分量表示RGB图像信号的色彩空间转换器。 该图像解码系统还包括一个伽马校正单元和一个图像信号格式器。 使用与由色空间转换器产生的图像信号偏移相对应的图像黑色电平与零的偏移来进行去角度校正。 在另一个实施例中，增益，偏移和符号在去除伽马校正之前从由颜色空间转换器产生的图像信号中去除。 图像信号格式器可以利用一维和三维查找表来产生可以包括次级和白色图像分量的图像信号。 该系统有利地适应于常规的以及新的硬件显示系统架构中的解码xvYCC编码的图像数据。

    Color mapping techniques for color imaging devices
    6.
    发明申请
    Color mapping techniques for color imaging devices 有权
    彩色成像设备的色彩映射技术

    公开(公告)号：US20080043260A1

    公开(公告)日：2008-02-21

    申请号：US11466102

    申请日：2006-08-21

    Applicant: Rajeev Ramanath ,  Gregory S. Pettitt

    Inventor： Rajeev Ramanath ,  Gregory S. Pettitt

    IPC: G06F15/00

    CPC classification number: G06T11/001 ,  G09G5/06 ,  G09G2340/06 ,  H04N1/6058

    Abstract: Disclosed embodiments relate to techniques for color gamut mapping when an input signal transmitting color visual images has a different color gamut than does the output display device. Polynomial rubber-sheet mapping may be used to translate the input color gamut to the output color gamut on a hue-by-hue basis within a three-dimensional perceptual color space. Also, a memory color look-up table may be used to preserve memory colors in the input gamut which are capable of reproduction within the output gamut. By using such techniques alone or in combination, it may be possible to more effectively map an input color gamut to a different output color gamut with improved calorimetric accuracy.

    Abstract translation: 公开的实施例涉及当传输彩色视觉图像的输入信号具有与输出显示装置不同的色域时的色域映射的技术。 可以使用多项式橡胶片映射在三维感知色彩空间内以色相为基础将输入色域转换为输出色域。 此外，可以使用存储器颜色查找表来保留能够在输出色域内再现的输入色域中的存储器颜色。 通过单独或组合使用这些技术，可以更有效地将输入色域映射到具有改进的量热精度的不同输出色域。

    Color mapping techniques for color imaging devices
    7.
    发明授权
    Color mapping techniques for color imaging devices 有权
    彩色成像设备的色彩映射技术

    公开(公告)号：US07893945B2

    公开(公告)日：2011-02-22

    申请号：US11466102

    申请日：2006-08-21

    Applicant: Rajeev Ramanath ,  Gregory S. Pettitt

    Inventor： Rajeev Ramanath ,  Gregory S. Pettitt

    IPC: G09G5/02

    CPC classification number: G06T11/001 ,  G09G5/06 ,  G09G2340/06 ,  H04N1/6058

    Abstract: Disclosed embodiments relate to techniques for color gamut mapping when an input signal transmitting color visual images has a different color gamut than does the output display device. Polynomial rubber-sheet mapping may be used to translate the input color gamut to the output color gamut on a hue-by-hue basis within a three-dimensional perceptual color space. Also, a memory color look-up table may be used to preserve memory colors in the input gamut which are capable of reproduction within the output gamut. By using such techniques alone or in combination, it may be possible to more effectively map an input color gamut to a different output color gamut with improved calorimetric accuracy.

    Abstract translation: 公开的实施例涉及当传输彩色视觉图像的输入信号具有与输出显示装置不同的色域时的色域映射的技术。 可以使用多项式橡胶片映射在三维感知色彩空间内以色相为基础将输入色域转换为输出色域。 此外，可以使用存储器颜色查找表来保留能够在输出色域内再现的输入色域中的存储器颜色。 通过单独或组合使用这些技术，可以更有效地将输入色域映射到具有改进的量热精度的不同输出色域。

    Apparatus and Method for Decoding Extended Color Space Data
    8.
    发明申请
    Apparatus and Method for Decoding Extended Color Space Data 有权
    用于解码扩展颜色空间数据的装置和方法

    公开(公告)号：US20090167955A1

    公开(公告)日：2009-07-02

    申请号：US11965671

    申请日：2007-12-27

    Applicant: Gregory S. Pettitt ,  Rajeev Ramanath

    Inventor： Gregory S. Pettitt ,  Rajeev Ramanath

    IPC: H04N9/64

    CPC classification number: H04N9/67 ,  H04N5/202 ,  H04N9/69

    Abstract: In one embodiment, an image decoding system for a YCbCr formatted signal includes a color space converter capable of representing an RGB image signal with one or two negative image signal components. The image decoding system further includes a degamma correction unit and an image signal formatter. An offset of the image black level from zero corresponding to the image signal offset produced by the color space converter is employed to perform degamma correction. In a further embodiment, gain, offset, and sign are removed from the image signal produced by the color space converter prior to degamma correction. The image signal formatter may utilize a one-dimensional and a three-dimensional lookup table to produce an image signal that may include secondary and white image components. The system advantageously accommodates decoding xvYCC-encoded image data in conventional as well as new hardware display system architectures.

    Abstract translation: 在一个实施例中，用于YCbCr格式化信号的图像解码系统包括能够用一个或两个负图像信号分量表示RGB图像信号的色彩空间转换器。 该图像解码系统还包括一个伽马校正单元和一个图像信号格式器。 使用与由色空间转换器产生的图像信号偏移相对应的图像黑色电平与零的偏移来进行去角度校正。 在另一个实施例中，增益，偏移和符号在去除伽马校正之前从由颜色空间转换器产生的图像信号中去除。 图像信号格式器可以利用一维和三维查找表来产生可以包括次级和白色图像分量的图像信号。 该系统有利地容纳以常规的以及新的硬件显示系统架构解码xvYCC编码的图像数据。

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