Method and apparatus for color correction of color devices for various operating conditions
    1.
    发明授权
    Method and apparatus for color correction of color devices for various operating conditions 有权
    用于各种操作条件的彩色装置的颜色校正的方法和装置

    公开(公告)号:US07969478B1

    公开(公告)日:2011-06-28

    申请号:US10419001

    申请日:2003-04-18

    IPC分类号: H04N9/73

    摘要: Methods and apparatuses for color correction of color device for various operating conditions. In at least one embodiment of the present invention, operating under a current condition, a color correction operation that is derived from color correction operations defined for other conditions is performed on the color data. In another embodiment, a device profile for managing colors for a color device operating under one condition is interpolated from the device profiles for the color device operating under other conditions (e.g., based on the input received from a user interface according to the perception of the user or based on the measurement of a sensor). The interpolation can be based on the input received from a user interface according to the perception of the user or it can be based on the measurement of a sensor or a set of sensors. Various operating conditions for a color device (e.g., a scanner, a camera, a video camera, a printer, a display device such as a CRT monitor or an LCD display panel, a television set, or others) include chromaticity and illumination of ambient light, background color for a display device, characteristics of print media for a printer, humidity, temperature, pressure and ink level for an ink jet printer, the age of a light source for a scanner, and others.

    摘要翻译: 用于各种操作条件的彩色装置的颜色校正的方法和装置。 在本发明的至少一个实施例中,在当前条件下操作,对颜色数据执行从为其他条件定义的颜色校正操作导出的颜色校正操作。 在另一个实施例中,用于管理在一个条件下操作的彩色设备的颜色的设备配置文件从用于在其他条件下操作的颜色设备的设备配置文件(例如,基于根据用户界面的感知从用户界面接收的输入) 用户或基于传感器的测量)。 内插可以基于根据用户感知从用户界面接收的输入,或者可以基于传感器或一组传感器的测量。 用于彩色设备(例如,扫描仪,照相机,摄像机,打印机,CRT显示器或LCD显示面板,电视机等的显示设备)的各种操作条件包括色度和环境照度 用于显示设备的光,背景颜色,用于打印机的打印介质的特性,用于喷墨打印机的湿度,温度,压力和墨水水平,扫描仪的光源的时代等。

    Method and apparatus for improved color correction
    2.
    发明授权
    Method and apparatus for improved color correction 有权
    改进颜色校正的方法和装置

    公开(公告)号:US07456843B2

    公开(公告)日:2008-11-25

    申请号:US11008890

    申请日:2004-12-10

    IPC分类号: G09G5/02

    摘要: Methods and apparatuses for performing gamma corrections to maintain a plurality of colors substantially consistent with a color point. In one aspect of the present invention, a method to generate correction functions for performing color correction for a device for signals of different color components in a color space includes: generating a first correction function for a first color component in the color space; and generating second correction functions for second color components in the color space by reducing first color differences between a target White point and white points of a plurality of grays corrected by the first and second correction functions. The second color components are the color components in the color space other than the first color component. The first color differences are minimized relative to a chromaticity diagram.

    摘要翻译: 用于执行伽马校正以维持与色点基本一致的多种颜色的方法和装置。 在本发明的一个方面中,一种生成用于对颜色空间中的不同颜色分量的信号进行装置的颜色校正的校正功能的方法包括:为颜色空间中的第一颜色分量生成第一校正函数; 以及通过减少由所述第一和第二校正功能校正的多个灰度的目标白点和白点之间的第一颜色差异,来产生所述颜色空间中的第二颜色分量的第二校正功能。 第二颜色分量是除了第一颜色分量之外的颜色空间中的颜色分量。 第一个色差相对于色度图最小化。

    Gaussian blur approximation suitable for GPU
    3.
    发明授权
    Gaussian blur approximation suitable for GPU 有权
    高斯模糊近似适用于GPU

    公开(公告)号:US07397964B2

    公开(公告)日:2008-07-08

    申请号:US10876039

    申请日:2004-06-24

    IPC分类号: G06K9/40

    CPC分类号: G06T5/002 G06T5/20

    摘要: A Gaussian blur approximation is applied to an image by repeated down-sampling operations followed by an up-sample operation. By using a truncated Gaussian filter as the down-sample filter, the frequency spectrum removed during down-sampling operations closely approximates the frequency spectrum lost during a true Gaussian blur operation. While any “good” up-sample filter may be used, up-sampling via linear interpolation may be especially beneficial in systems having a dedicated graphics processing unit. One benefit of the described technique is that it is computationally less costly to implement than a Gaussian blur. Another benefit is that this computational benefit increases as the size of the blur increases—becoming significant even for small blurs. Yet another benefit of the invention is that a judicious selection of pixel address to convolve with the filter leads to substantially reduced number of texture lookups required to effect a convolution.

    摘要翻译: 高斯模糊近似通过重复的下采样操作随后进行上采样操作来应用于图像。 通过使用截断高斯滤波器作为下采样滤波器,在下采样操作期间去除的频谱与真正的高斯模糊操作期间的频谱损失密切相近。 虽然可以使用任何“良好”的抽样滤波器,但通过线性插值的上采样在具有专用图形处理单元的系统中尤其有利。 所描述的技术的一个好处是,与高斯模糊相比,在计算上成本较低。 另一个好处是,随着模糊大小的增加,这种计算效益即使对于小的模糊也变得显着。 本发明的另一个好处是,与滤波器卷积的像素地址的明智选择导致实现卷积所需的纹理查找的数量大大减少。

    Manipulating text and graphic appearance
    4.
    发明授权
    Manipulating text and graphic appearance 有权
    操纵文字和图形外观

    公开(公告)号:US07227551B2

    公开(公告)日:2007-06-05

    申请号:US11021358

    申请日:2004-12-23

    申请人: Mark Zimmer Kok Chen

    发明人: Mark Zimmer Kok Chen

    CPC分类号: G06T11/203 G06T5/002 G06T5/20

    摘要: A method, device and computer system for creating a smooth, continuous height (scalar or vector) field are described. The described techniques permit arbitrary closed regions to be smoothly shaded without producing unnatural smoothness at the region's edges or boundaries.

    摘要翻译: 描述了用于创建平滑,连续的高度(标量或矢量)场的方法,设备和计算机系统。 所描述的技术允许任意闭合区域被平滑地遮蔽,而不会在该区域的边缘或边界处产生不自然的平滑度。

    Manipulating text and graphic appearance
    5.
    发明申请
    Manipulating text and graphic appearance 有权
    操纵文字和图形外观

    公开(公告)号:US20060139369A1

    公开(公告)日:2006-06-29

    申请号:US11021358

    申请日:2004-12-23

    申请人: Mark Zimmer Kok Chen

    发明人: Mark Zimmer Kok Chen

    IPC分类号: G09G5/00

    CPC分类号: G06T11/203 G06T5/002 G06T5/20

    摘要: A method, device and computer system for creating a smooth, continuous height (scalar or vector) field are described. The described techniques permit arbitrary closed regions to be smoothly shaded without producing unnatural smoothness at the region's edges or boundaries.

    摘要翻译: 描述了用于创建平滑,连续的高度(标量或矢量)场的方法,设备和计算机系统。 所描述的技术允许任意闭合区域被平滑地遮蔽,而不会在该区域的边缘或边界处产生不自然的平滑度。

    Luminance point correction without luminance degradation
    6.
    发明申请
    Luminance point correction without luminance degradation 有权
    亮度点校正无亮度降低

    公开(公告)号:US20060050080A1

    公开(公告)日:2006-03-09

    申请号:US11265882

    申请日:2005-11-02

    IPC分类号: G09G5/02

    摘要: White point is corrected without degrading luminance on a display device. A white point manager modifies the balance between red, green and blue according to a target white point up to a threshold gray value. As the gray scale approaches white from the threshold gray value, the white point manager blends the balance between red, green and blue from the target white point substantially towards the native white point for the display device, so as not to degrade luminance as the gray scale approaches white.

    摘要翻译: 校正白点而不降低显示装置上的亮度。 白点管理员根据目标白点修改红,绿和蓝之间的平衡,直到阈值灰度值。 当灰度级从阈值灰度值接近白色时,白点管理器将红色,绿色和蓝色之间的平衡从目标白点基本上与显示设备的本机白点混合,以免将亮度降低为灰色 规模接近白色。

    Method and apparatus for correcting pixel level intensity variation

    公开(公告)号:US06954193B1

    公开(公告)日:2005-10-11

    申请号:US09657532

    申请日:2000-09-08

    IPC分类号: G09G3/36

    摘要: A method and apparatus is described for providing a consistent visual appearance of pixels of a display screen with respect to a viewing position. Variations between perceived pixel level values associated with the pixels and corresponding pixel level values may be compensated for. Variations are associated with a viewing angle between pixel location and the viewing position and compensated for by applying a respective different correction factor to each of the corresponding pixel level values based on a respective viewing angle. Accordingly different non-linear correction curves corresponding to locations may be established relating a range of pixel level values to a corresponding range of corrected pixel level values associated with the viewing position. A calibration pattern may be further be displayed and user inputs associated with locations received responsive to calibration pattern. Viewing position and non-linear correction curves may thereby be established for locations relative to the viewing position and based on user inputs. User inputs are stored with an association to a user identity. A user input is processed to obtain user identity and stored user inputs and viewing position and non-linear correction curves established based on the user inputs. Change is detected in a relative orientation between a display orientation and the viewing position and a second respective different correction factor applied to each corresponding pixel level value based on the change. Second different non-linear correction curves are established relating pixel level values to corrected values associated with relative orientations. Interpolation or an analytical function is applied to arrive at corrected pixel values. To detect changes, one or more sensors are read. A viewing position sensor senses the position of a remote device coupled to the viewer. The viewer feature tracking sensor includes a camera and means for analyzing an image for features associated with the viewer.

    Conversion of output device color values to minimize image quality artifacts
    8.
    发明申请
    Conversion of output device color values to minimize image quality artifacts 失效
    转换输出设备颜色值以最小化图像质量伪像

    公开(公告)号:US20080024805A1

    公开(公告)日:2008-01-31

    申请号:US11902778

    申请日:2007-09-25

    IPC分类号: G06F15/00 G03F3/08

    摘要: Undesirable artifacts appearing in color images, such as blooming or smudging around the edges of text, are avoided through selective reduction of the color gamut for objects which form the image. Individual component color values are modified by taking into account combinations of colors and their effect upon the artifacts to be eliminated. Only those parameter values which contribute to the artifact are modified. Other parameter values are left intact, to maintain the original image characteristics. When a color value is modified, all components of that color are modified in a symmetrical manner, to preserve the hue of the original color. The impact on the image is further minimized by selectively applying color correction only to those objects in which the artifact is pronounced.

    摘要翻译: 通过选择性地减少形成图像的对象的色域来避免出现在彩色图像中的不期望的伪像,例如在文本边缘处的起霜或污迹。 通过考虑颜色的组合及其对待消除的伪影的影响来修改单个组件颜色值。 只修改有助于工件的参数值。 其他参数值保持原样,以保持原始图像特征。 当颜色值被修改时,该颜色的所有成分都以对称方式修改,以保持原始颜色的色调。 通过选择性地将色彩校正仅仅应用于伪造物的那些对象来进一步减小对图像的影响。

    Gaussian blur approximation suitable for GPU
    10.
    发明申请
    Gaussian blur approximation suitable for GPU 有权
    高斯模糊近似适用于GPU

    公开(公告)号:US20050286794A1

    公开(公告)日:2005-12-29

    申请号:US10876039

    申请日:2004-06-24

    IPC分类号: G06K9/32 G06K9/40 G06T5/00

    CPC分类号: G06T5/002 G06T5/20

    摘要: A Gaussian blur approximation is applied to an image by repeated down-sampling operations followed by an up-sample operation. By using a truncated Gaussian filter as the down-sample filter, the frequency spectrum removed during down-sampling operations closely approximates the frequency spectrum lost during a true Gaussian blur operation. While any “good” up-sample filter may be used, up-sampling via linear interpolation may be especially beneficial in systems having a dedicated graphics processing unit. One benefit of the described technique is that it is computationally less costly to implement than a Gaussian blur. Another benefit is that this computational benefit increases as the size of the blur increases—becoming significant even for small blurs. Yet another benefit of the invention is that a judicious selection of pixel address to convolve with the filter leads to substantially reduced number of texture lookups required to effect a convolution.

    摘要翻译: 高斯模糊近似通过重复的下采样操作随后进行上采样操作来应用于图像。 通过使用截断高斯滤波器作为下采样滤波器,在下采样操作期间去除的频谱与真正的高斯模糊操作期间的频谱损失密切相近。 虽然可以使用任何“良好”的抽样滤波器,但通过线性插值的上采样在具有专用图形处理单元的系统中尤其有利。 所描述的技术的一个好处是,与高斯模糊相比,在计算上成本较低。 另一个好处是,随着模糊大小的增加,这种计算效益即使对于小的模糊也变得显着。 本发明的另一个好处是,与滤波器卷积的像素地址的明智选择导致实现卷积所需的纹理查找的数量大大减少。