Method for segmenting and estimating a moving object motion using a
hierarchy of motion models
    1.
    发明授权
    Method for segmenting and estimating a moving object motion using a hierarchy of motion models 失效
    使用运动模型层次分割和估计移动物体运动的方法

    公开(公告)号:US5734737A

    公开(公告)日:1998-03-31

    申请号:US502228

    申请日:1995-07-13

    CPC分类号: G06T7/2053 H04N19/53

    摘要: A method, for use in an object-oriented analysis-synthesis coder, for segmenting an image signal into moving objects contained in a current frame and describing each motion of the moving objects with a set of motion parameters using a multi-stage segmentation comprises the steps of: (a) comparing the current frame with its preceding frame to detect a moving area in the current frame; (b) further comparing the current frame with the preceding frame to detect a motion vector for each pixel in the moving area, i.e., a motion vector field; (c) first segmenting the motion vector field by using a two dimensional translational patch model; (d) secondly segmenting the first stage segmenting results by using a planar patch model; and (e) thirdly segmenting the second-stage segmenting results by using a parabolic patch model.

    摘要翻译: 一种用于面向对象的分析合成编码器中的方法,用于将图像信号分割成包含在当前帧中的移动对象,并且使用多级分段来描述运动对象的一组运动参数的每个运动,包括: 步骤:(a)将当前帧与其前一帧进行比较,以检测当前帧中的移动区域; (b)进一步比较当前帧与前一帧以检测运动区域中的每个像素即运动矢量场的运动矢量; (c)通过使用二维平移补片模型首先分割运动矢量场; (d)使用平面贴片模型二次分割第一阶段分割结果; 和(e)通过使用抛物线贴片模型第三次分割第二阶段分割结果。

    Method for segmenting and estimating a moving object motion
    2.
    发明授权
    Method for segmenting and estimating a moving object motion 失效
    分割和估计移动物体运动的方法

    公开(公告)号:US5748761A

    公开(公告)日:1998-05-05

    申请号:US502229

    申请日:1995-07-13

    CPC分类号: H04N19/543 H04N19/20

    摘要: A method for use in an object-oriented analysis-synthesis coder, for segmenting an image of a current frame into moving objects and describing each motion of the moving objects with a set of motion parameters, which comprises the steps of: (a) comparing the current frame with a preceding frame to detect a motion vector field; (b) sliding window blocks on the motion vector field, and computing the degree of homogeneity for each of the window blocks to produce a seed block; (c) determining a set of initial values for the set of motion parameters based on the seed block; (d) evaluating whether each motion vector contained in and around the seed block is describable with the set of initial values or not, to thereby detect a revised region; (e) determining a set of revised values for the set of motion parameters from the revised region; (f) evaluating whether each motion vector contained in and around the revised region is describable with the set of revised values or not, to thereby detect a newly revised region; and (g) repeating the steps (e) and (f) until the difference between a current revised region and a previous revised region is less than a predetermined value, to thereby determine a set of final values for the set of motion parameters.

    摘要翻译: 一种在面向对象分析合成编码器中使用的方法,用于将当前帧的图像分割成运动对象,并用一组运动参数描述运动对象的每个运动,其包括以下步骤:(a)比较 当前帧具有前一帧以检测运动矢量场; (b)在运动矢量场上滑动窗口块,并且计算每个窗口块的均匀度以产生种子块; (c)基于所述种子块确定所述一组运动参数的一组初始值; (d)评估包含在种子块内和周围的每个运动矢量是否可以用初始值的集合来描述,从而检测修正的区域; (e)从经修订的区域确定一组运动参数的修正值; (f)评估修改后区域内及其周围的每个运动矢量是否可以用一组修订值进行描述,从而检测新修订的区域; 和(g)重复步骤(e)和(f),直到当前修订区域和先前修订区域之间的差值小于预定值,从而确定该组运动参数的一组最终值。