公开(公告)号：US20090196507A1

公开(公告)日：2009-08-06

申请号：US12322250

申请日：2009-01-30

申请人： Young-O Park ,  Kwan-Woong Song ,  Young-Hun Joo ,  Kwang-Pyo Choi ,  Yun-Je Oh ,  Chang-Su Kim ,  Jae-Kyun Ahn

发明人： Young-O Park ,  Kwan-Woong Song ,  Young-Hun Joo ,  Kwang-Pyo Choi ,  Yun-Je Oh ,  Chang-Su Kim ,  Jae-Kyun Ahn

IPC分类号： G06K9/48

CPC分类号： G06K9/00234 ,  G06K9/00369 ,  G06K9/48

摘要： A method and apparatus for estimating the contour of a user object in a moving picture during video communications so that a personal background image is not provided during video communications. Information about center coordinates as well as a size of a face of the user object is extracted from a moving picture frame. Edges are extracted from the moving picture frame, and a boundary of a head of the user object is estimated using a semicircle. The boundaries of left and right shoulders and left and right arms of the user object are estimated using second-order function graphs that overlap a largest portion of the edges. An entire contour of the user object is estimated according to the boundaries of the head, the left and right shoulders, and the left and right arms of the user object.

摘要翻译： 一种用于在视频通信期间估计运动图像中的用户对象的轮廓的方法和装置，使得在视频通信期间不提供个人背景图像。 从运动图像帧中提取关于中心坐标以及用户对象的面部大小的信息。 从运动图像帧提取边缘，并且使用半圆来估计用户对象的头部的边界。 使用与边缘的最大部分重叠的二阶函数图来估计用户对象的左肩和右肩和左右臂的边界。 用户对象的整体轮廓根据用户对象的头部，左肩和右肩部以及左右臂的边界来估计。

公开(公告)号：US08437393B2

公开(公告)日：2013-05-07

申请号：US12363812

申请日：2009-02-02

申请人： Young-O Park ,  Kwan-Woong Song ,  Young-Hun Joo ,  Kwang-Pyo Choi ,  Yun-Je Oh ,  Chang-Su Kim ,  Jae-Kyun Ahn

发明人： Young-O Park ,  Kwan-Woong Song ,  Young-Hun Joo ,  Kwang-Pyo Choi ,  Yun-Je Oh ,  Chang-Su Kim ,  Jae-Kyun Ahn

IPC分类号： H04N7/12 ,  G06K9/00

CPC分类号： G06T7/143 ,  G06T7/12 ,  G06T7/194 ,  G06T2207/10016 ,  G06T2207/20092

摘要： A method for estimating a boundary between a background and a user object in a video, in which the user object is segmented from the background is provided. The initial object contour is estimated in a first video frame for object segmentation, and color probability density functions are estimated for the user object and the background segmented from the first video frame. An edge strip with a predetermined width is generated in a current frame based on an object contour of a previous frame, and a coherence probability density function of the edge strip is estimated. The user object is segmented in the current frame by energy minimization.

摘要翻译： 提供了一种用于估计视频中的背景和用户对象之间的边界的方法，其中用户对象从背景被分割。 在用于对象分割的第一视频帧中估计初始对象轮廓，并且针对用户对象和从第一视频帧分割的背景估计颜色概率密度函数。 基于前一帧的对象轮廓在当前帧中生成具有预定宽度的边缘条，并且估计边缘条的相干概率密度函数。 通过能量最小化在当前帧中对用户对象进行分段。

公开(公告)号：US08300947B2

公开(公告)日：2012-10-30

申请号：US12322250

申请日：2009-01-30

申请人： Young-O Park ,  Kwan-Woong Song ,  Young-Hun Joo ,  Kwang-Pyo Choi ,  Yun-Je Oh ,  Chang-Su Kim ,  Jae-Kyun Ahn

发明人： Young-O Park ,  Kwan-Woong Song ,  Young-Hun Joo ,  Kwang-Pyo Choi ,  Yun-Je Oh ,  Chang-Su Kim ,  Jae-Kyun Ahn

IPC分类号： G06K9/48

CPC分类号： G06K9/00234 ,  G06K9/00369 ,  G06K9/48

摘要： A method and apparatus for estimating the contour of a user object in a moving picture during video communications so that a personal background image is not provided during video communications. Information about center coordinates as well as a size of a face of the user object is extracted from a moving picture frame. Edges are extracted from the moving picture frame, and a boundary of a head of the user object is estimated using a semicircle. The boundaries of left and right shoulders and left and right arms of the user object are estimated using second-order function graphs that overlap a largest portion of the edges. An entire contour of the user object is estimated according to the boundaries of the head, the left and right shoulders, and the left and right arms of the user object.

摘要翻译： 一种用于在视频通信期间估计运动图像中的用户对象的轮廓的方法和装置，使得在视频通信期间不提供个人背景图像。 从运动图像帧中提取关于中心坐标以及用户对象的面部大小的信息。 从运动图像帧提取边缘，并且使用半圆来估计用户对象的头部的边界。 使用与边缘的最大部分重叠的二阶函数图来估计用户对象的左肩和右肩和左右臂的边界。 用户对象的整体轮廓根据用户对象的头部，左肩和右肩部以及左右臂的边界来估计。