Voting-based video background mosaicking
    41.
    发明授权
    Voting-based video background mosaicking 有权
    基于投票的视频背景镶嵌

    公开(公告)号:US07257252B2

    公开(公告)日:2007-08-14

    申请号:US10318563

    申请日:2002-12-12

    申请人: Xun Xu

    发明人: Xun Xu

    IPC分类号: G06K9/34

    摘要: For each pixel in a video background mosaic, intensity values associated with corresponding pixels in multiple video frames are collected, and an intensity value associated with the majority of the corresponding pixels is selected. The selected intensity value defines intensity of the pixel in the video background mosaic.

    摘要翻译: 对于视频背景马赛克中的每个像素,收集与多个视频帧中的对应像素相关联的强度值,并且选择与大部分相应像素相关联的强度值。 所选择的强度值定义视频背景马赛克中像素的强度。

    Hybrid global motion estimator for video encoding
    42.
    发明申请
    Hybrid global motion estimator for video encoding 审中-公开
    用于视频编码的混合全局运动估计器

    公开(公告)号:US20060062303A1

    公开(公告)日:2006-03-23

    申请号:US10943625

    申请日:2004-09-17

    申请人: Xun Xu

    发明人: Xun Xu

    摘要: A method and system for detecting and estimating global motion among video frames includes down sampling a first and a second video frame to a low resolution version (I1, I2) and performing a block matching on the low resolution images by treating both images (I1, I2) as two single blocks. This method and system therefore utilizes low-frequency picture information, resulting in a motion vector (U,V), and the second low resolution image I2 being segmented into two regions, a region of high matching difference and a region of low matching difference. The method and system then refines the motion vector (U,V) by calculating the horizontal, vertical, zooming and rotation motion components (Tx, Ty, Tz, Tr), based on the pixels in the region of low matching difference, by gradient-based method.

    摘要翻译: 用于检测和估计视频帧中的全局运动的方法和系统包括将第一和第二视频帧下采样到低分辨率版本(I 1,I 2),并通过处理两个图像对低分辨率图像执行块匹配( I 1,I 2)作为两个单独的块。 因此,该方法和系统利用低频图像信息,得到运动矢量(U,V),将第二低分辨率图像I 2分割成两个区域,高匹配差区域和低匹配差区域 。 然后,该方法和系统通过计算水平,垂直,变焦和旋转运动分量(T,T,T,T,SUB) 通过基于梯度的方法,基于低匹配差的区域中的像素,以及/或者,Z )。