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    Content adaptive noise reduction filtering for image signals
    111.
    发明申请
    Content adaptive noise reduction filtering for image signals 有权
    图像信号的内容自适应降噪滤波

    公开(公告)号：US20070064792A1

    公开(公告)日：2007-03-22

    申请号：US11230148

    申请日：2005-09-19

    Applicant: Yi-Jen Chiu ,  Louis Lippincott

    Inventor： Yi-Jen Chiu ,  Louis Lippincott

    IPC: H04N11/04 ,  H04B1/66

    CPC classification number: G06T5/002 ,  G06T5/20 ,  G06T7/13 ,  G06T2207/10016 ,  G06T2207/20012 ,  G06T2207/20192 ,  H04N19/117 ,  H04N19/14 ,  H04N19/85 ,  H04N19/86

    Abstract: A method includes selecting a target pixel and comparing a value of the target pixel with a respective value of each of a plurality of pixels located in an area that includes the target pixel. Further, for each pixel of the plurality of pixels that has a value different by at least a threshold amount from the value of the target pixel, the value of such pixel is replaced by the value of the target pixel. A filter function is applied to a set of pixels which includes the value of the target pixel and current values, after the selective replacement step, of the plurality of pixels.

    Abstract translation: 一种方法包括选择目标像素并将目标像素的值与位于包括目标像素的区域中的多个像素中的每一个的相应值进行比较。 此外，对于具有与目标像素的值相差至少阈值的值的多个像素中的每个像素，这样的像素的值被目标像素的值代替。 滤波器函数被应用于包括多个像素的选择性替换步骤之后的目标像素的值和当前值的像素集合。

    Perceptual filter support techniques
    112.
    发明申请
    Perceptual filter support techniques 有权
    感知过滤器支持技术

    公开(公告)号：US20060257044A1

    公开(公告)日：2006-11-16

    申请号：US11126578

    申请日：2005-05-10

    Applicant: Yi-Jen Chiu

    Inventor： Yi-Jen Chiu

    IPC: G06K9/40

    CPC classification number: G06T5/002 ,  G06T5/20 ,  G06T2207/20192 ,  H04N19/80

    Abstract: A system, apparatus, method and article to filter media signals are described. The apparatus may include a media processor. The media processor may include an image signal processor having multiple processing elements to process a pixel matrix to determine a set of filter support pixels for a target pixel, select reference pixels from the filter support pixels using a complexity value, and filter noise from the target pixel using the reference pixels. Other embodiments are described and claimed.

    Abstract translation: 描述了过滤媒体信号的系统，装置，方法和制品。 该装置可以包括媒体处理器。 媒体处理器可以包括具有多个处理元件以处理像素矩阵以确定目标像素的滤波器支持像素的集合的图像信号处理元件，使用复杂度值从滤波器支持像素中选择参考像素，以及从目标滤波噪声 像素使用参考像素。 描述和要求保护其他实施例。

    Detection of artifacts resulting from image signal decompression
    113.
    发明申请
    Detection of artifacts resulting from image signal decompression 失效
    检测由图像信号减压产生的伪影

    公开(公告)号：US20060245499A1

    公开(公告)日：2006-11-02

    申请号：US11120106

    申请日：2005-05-02

    Applicant: Yi-Jen Chiu ,  Jorge Caviedes

    Inventor： Yi-Jen Chiu ,  Jorge Caviedes

    IPC: H04N11/04

    CPC classification number: H04N19/86 ,  H04N19/117 ,  H04N19/14 ,  H04N19/176 ,  H04N19/182 ,  H04N19/61

    Abstract: A method includes making a first determination as to whether a current pixel has a value which reflects a mosquito noise artifact, and determining whether to apply a filtering process at the current pixel based on a result of the first determination. In addition, or alternatively, a method includes making a second determination as to whether a current pixel has a value which reflects a ringing artifact, and determining whether to apply a filtering process at the current pixel based on a result of the second determination.

    Abstract translation: 一种方法包括：对当前像素是否具有反映蚊式噪声伪影的值进行第一确定，以及基于第一确定的结果来确定是否对当前像素应用滤波处理。 另外或者替代地，一种方法包括对当前像素是否具有反映振铃伪影的值进行第二确定，以及基于第二确定的结果来确定是否对当前像素应用滤波处理。

    Motion vector estimation based on statistical features of an image frame
    114.
    发明授权
    Motion vector estimation based on statistical features of an image frame 有权
    基于图像帧的统计特征的运动矢量估计

    公开(公告)号：US06463164B1

    公开(公告)日：2002-10-08

    申请号：US09137400

    申请日：1998-08-20

    Applicant: Yi-Jen Chiu ,  John Hartung

    Inventor： Yi-Jen Chiu ,  John Hartung

    IPC: G06K900

    CPC classification number: G06T7/277

    Abstract: A method for estimating motion vectors between a current frame and a reference frame of a video signal wherein the current frame is divided into a plurality of search blocks and the reference frame and is defined to include a plurality of search regions corresponding to the plurality of search blocks, each of the plural search regions having a plurality of candidate blocks. The method includes the steps of calculating horizontal and vertical features of a reference frame based on pixel data of the reference frame; storing the calculated horizontal and vertical features; computing horizontal and vertical features of a kth search block of the plurality of search blocks; comparing the horizontal and vertical features of the kth search block with those of each of the plurality of candidate blocks of the reference frame in a corresponding search region using a computationally-efficient error measure; selecting a candidate block which yields a minimal error measure; and computing a motion vector for the kth search block based on the selected candidate block.

    Abstract translation: 一种用于估计视频信号的当前帧和参考帧之间的运动矢量的方法，其中当前帧被划分为多个搜索块和参考帧，并且被定义为包括与多个搜索对应的多个搜索区域 多个搜索区域中的每一个具有多个候选块。 该方法包括基于参考帧的像素数据计算参考帧的水平和垂直特征的步骤; 存储计算的水平和垂直特征; 计算所述多个搜索块的第k个搜索块的水平和垂直特征; 使用计算有效的误差测量将第k个搜索块的水平和垂直特征与参考帧的多个候选块中的每一个的相应搜索区域的水平和垂直特征进行比较; 选择产生最小误差测量的候选块; 以及基于所选择的候选块来计算第k个搜索块的运动矢量。

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