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    Detection of artifacts resulting from image signal decompression
    111.
    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
    112.
    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。

    Detecting video formats
    119.
    发明授权
    Detecting video formats 有权
    检测视频格式

    公开(公告)号：US09148620B2

    公开(公告)日：2015-09-29

    申请号：US13083681

    申请日：2011-04-11

    Applicant: Jong Dae Oh ,  Yi-Jen Chiu ,  Sang-Hee Lee ,  Ning Lu

    Inventor： Jong Dae Oh ,  Yi-Jen Chiu ,  Sang-Hee Lee ,  Ning Lu

    IPC: H04N7/01

    CPC classification number: H04N7/0115

    Abstract: The format of telecined video may be determined including a bottom field first cadence. In addition, video using 2:3:3:2 top field first can be identified. Moreover, mixed cadence videos can also be detected. In some embodiments, mixed cadence videos may be detected by calculating variances of different areas within a frame.

    Abstract translation: 可以确定电视视频的格式，包括底场第一节奏。 另外，可以首先识别使用2：3：3：2顶场的视频。 此外，还可以检测到混合的节奏视频。 在一些实施例中，可以通过计算帧内不同区域的方差来检测混合节奏视频。

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