Structured Description of Picture Information

(1)为了提取运动视频中的运动目标并估计其运动，提出了N种采样方法中的ACM、M方法。采样ACM是一种提取物体轮廓的新技术。与蛇相比，它还具有降低噪音的能力。M of N方法是一种稳健的估计二维运动矢量的方法，它通过采样ACM从提取的轮廓中估计二维运动矢量，结合语音流和二维速度，可以得到三维速度。(2)提出了一种新的媒体同步方法，该方法具有无相对延迟地显示运动视频和语音的能力。在所提出的方法中，计算机向数据库发出请求，发送指定数量的帧。利用运动JPEG编码器编码的运动视频进行实验。(3)提出了一种提取人体运动的新方法。该方法可以作为新的人机界面。

(1) To extract an moving object and estimate its motion in motion video, Sampling ACM,M out of N methods are develpped. Sampling ACM is the new technique to extract a contour of the object. It also has the capability to reduce noise, compared with the Snakes. M out of N method is the robust method to estimate two dimensional motion vector from the extracted contour by Sampled ACM.Combining the opotical flow and the two dimensional velocity, the three dimensional velocity can be obtained.(2) New media synchronization method is proposed, which has the capability to display motion video and voice without relative delay. In the proposed method, the computer issues the request to the database, to send specified number of frame. Experiment is done using motion video coded by the motion JPEG coder.(3) New method is developped which can extract the motion of the human body. This method can be used as the new human-computer interface.