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    Dynamic gamma for a liquid crystal display
    32.
    发明授权
    Dynamic gamma for a liquid crystal display 有权
    用于液晶显示器的动态伽马

    公开(公告)号：US07164284B2

    公开(公告)日：2007-01-16

    申请号：US10965059

    申请日：2004-10-13

    Applicant: Hao Pan ,  Xiao-fan Feng ,  Scott J. Daly

    Inventor： Hao Pan ,  Xiao-fan Feng ,  Scott J. Daly

    IPC: G01R31/00

    CPC classification number: G01J1/42 ,  G02F1/1309 ,  G09G3/3611 ,  G09G2320/0276 ,  G09G2320/0693

    Abstract: A system for characterizing the temporal luminance response of a liquid crystal display. A liquid crystal display may be forced at an initial time from a first luminance value to a measured second luminance value. The second luminance value may be measured at a predetermined time after the initial time.

    Abstract translation: 用于表征液晶显示器的时间亮度响应的系统。 可以在从第一亮度值到测量的第二亮度值的初始时间强制进行液晶显示。 可以在初始时间之后的预定时间测量第二亮度值。

    Efficient document boundary determination
    33.
    发明授权
    Efficient document boundary determination 有权
    有效的文件边界确定

    公开(公告)号：US06987880B2

    公开(公告)日：2006-01-17

    申请号：US09814585

    申请日：2001-03-22

    Applicant: John E. Dolan ,  John C. Dalrymple ,  James Zhixin Chang ,  Xiao-fan Feng

    Inventor： John E. Dolan ,  John C. Dalrymple ,  James Zhixin Chang ,  Xiao-fan Feng

    IPC: G06K9/00 ,  G06K9/48

    CPC classification number: G06K9/3283

    Abstract: An imaging system includes an imaging sensing device sensing an object having a first background color and a backing in opposing relationship with the object having a second background color which is substantially the same as the first background color. The imaging system determines at least one general bounding region of the object based upon a shadow cast onto backing by the object.

    Abstract translation: 成像系统包括感测具有第一背景颜色的对象的成像感测装置和与对象具有与第一背景颜色基本相同的第二背景颜色的对象关系的背景。 成像系统基于被物体背衬上的阴影投影来确定物体的至少一个一般的界限区域。

    Method and apparatus for compression and decompression of halftoned images
    37.
    发明授权
    Method and apparatus for compression and decompression of halftoned images 有权
    用于压缩和减压的图像的方法和装置

    公开(公告)号：US06798543B1

    公开(公告)日：2004-09-28

    申请号：US09660754

    申请日：2000-09-13

    Applicant: Xiao-fan Feng

    Inventor： Xiao-fan Feng

    IPC: G06K1500

    CPC classification number: G06T9/004

    Abstract: A method for compression and decompression of halftoned images using the halftone screen. The method reduces an input binary image into a mean image, uses the halftone screen in combination with the mean image to produce a predicted image. The predicted image is then compared to the original image to produce a residue image. The residue image and the mean image are then compressed and either stored or transmitted. For decompression, the mean image and residue image are decompressed and then used with the halftone screen to arrive at a reconstructed binary image. A prediction process uses the mean image and scales it to a full-size image that has substantially similar dimensions as the original image. It then applies the halftone screen to the full-size image and produces a predicted image.

    Abstract translation: 使用半色调屏幕对半色调图像进行压缩和解压缩的方法。 该方法将输入的二进制图像缩小为平均图像，使用与平均图像组合的半色调屏幕来产生预测图像。 然后将预测图像与原始图像进行比较以产生残差图像。 然后将残差图像和平均图像压缩并存储或传输。 对于解压缩，平均图像和残差图像被解压缩，然后与半色调屏幕一起使用以得到重构的二值图像。 预测过程使用平均图像并将其缩放成具有与原始图像基本相似的尺寸的全尺寸图像。 然后将半色调屏幕应用于全尺寸图像并产生预测图像。

    Method and system for hybrid error diffusion processing of image information using adaptive white and black reference values
    38.
    发明授权
    Method and system for hybrid error diffusion processing of image information using adaptive white and black reference values 失效
    使用自适应白色和黑色参考值对图像信息进行混合误差扩散处理的方法和系统

    公开(公告)号：US06233360B1

    公开(公告)日：2001-05-15

    申请号：US08718799

    申请日：1996-09-24

    Applicant: David J. Metcalfe ,  Roger L. Triplett ,  Xiao-fan Feng ,  John T. Newell

    Inventor： David J. Metcalfe ,  Roger L. Triplett ,  Xiao-fan Feng ,  John T. Newell

    IPC: G06K936

    CPC classification number: H04N1/4053

    Abstract: A method and system implements a high addressability characteristic into an error diffusion process. A histogram of the image is generated and the actual background and black reference values are determined. A gray level value representing a pixel is received. The gray level value has a first resolution which corresponds to an original input resolution. The gray level value is interpolated to generate subpixel gray level values which correspond to a second resolution. The second resolution is higher than the first resolution and corresponds to the high addressability characteristic. A threshold circuit thresholds the interpolated gray level value and generates an error value as a result of the threshold using the determined background and black reference values. The error value has a resolution corresponding to the first resolution. A portion of the error value is diffused to adjacent pixels on a next scanline.

    Abstract translation: 一种方法和系统在误差扩散过程中实现了高寻址特性。 生成图像的直方图，并确定实际背景和黑色参考值。 接收表示像素的灰度值。 灰度值具有对应于原始输入分辨率的第一分辨率。 内插灰度值以生成对应于第二分辨率的子像素灰度级值。 第二分辨率高于第一分辨率，并且对应于高寻址特性。 阈值电路对内插灰度值进行阈值阈值，并使用确定的背景和黑色参考值作为阈值的结果生成误差值。 误差值具有对应于第一分辨率的分辨率。 错误值的一部分扩散到下一个扫描线上的相邻像素。

    Newton ring mura detection system
    39.
    发明授权
    Newton ring mura detection system 有权
    牛顿环村检测系统

    公开(公告)号：US08780097B2

    公开(公告)日：2014-07-15

    申请号：US13277953

    申请日：2011-10-20

    Applicant: Xinyu Xu ,  Xiao-fan Feng ,  Chang Yuan

    Inventor： Xinyu Xu ,  Xiao-fan Feng ,  Chang Yuan

    IPC: G09G5/00

    CPC classification number: G09G3/006 ,  G09G2320/0233 ,  G09G2320/0238 ,  G09G2354/00 ,  G09G2360/16

    Abstract: A system for detecting newton ring mura on a display includes sensing an image of the display with an image capture device and determining a border boundary of an illuminated portion of the display. The image is spatially filtered as defined by the border boundary using a filter that reduces sensor noise and a grid pattern of the display. The spatially filtered image is processed to determine if a region proximate a pixel location is a potential newton ring mura defect and characterizing the potential newton ring mura defects to remove at least one of the potential newton ring mura defects.

    Abstract translation: 用于在显示器上检测牛顿环纹的系统包括用图像捕获装置感测显示器的图像并确定显示器的照明部分的边界。 图像由边界边界定义的空间过滤，使用降低传感器噪声和显示器的网格图案的滤波器。 处理空间过滤的图像以确定邻近像素位置的区域是否是潜在的牛顿环mura缺陷并且表征潜在的牛顿环mura缺陷以去除潜在的牛顿环mura缺陷中的至少一个。

    Multi-primary display with area active backlight
    40.
    发明授权
    Multi-primary display with area active backlight 有权
    具有区域主动背光的多主显示

    公开(公告)号：US08605124B2

    公开(公告)日：2013-12-10

    申请号：US13221347

    申请日：2011-08-30

    Applicant: Xiao-fan Feng

    Inventor： Xiao-fan Feng

    IPC: G09G5/10 ,  G09G3/36

    CPC classification number: G09G3/3413 ,  G09G3/3426 ,  G09G3/3611 ,  G09G2300/0452 ,  G09G2320/0646 ,  G09G2320/0666

    Abstract: A method of illuminating a display includes spatially varying the luminance of a multi-colored light source illuminating a plurality of pixels of the display in response to receiving a plurality of pixel values, and varying the transmittance of a light valve of the display having filters corresponding to the multi-colored light source in response to receiving the plurality of pixel values. The illumination is modified for a plurality of pixel values based upon modification of the luminance of the light source and varying the transmittance of the light valve.

    Abstract translation: 照明显示器的方法包括：响应于接收到多个像素值而对显示器的多个像素照亮多色光源的空间变化的亮度，并且改变具有对应的滤光器的显示器的光阀的透射率 响应于接收到多个像素值而到达多色光源。 基于光源的亮度的改变和改变光阀的透射率，对多个像素值修改照明。

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