利用分形变换的帧间图象运动补偿预测编码

首先把分形编码中的变换方法引入传统的运动补偿预测算法中；并进一步提出一种图象序列正交树自适应分块分形压缩编码新方法，用于三维图象块的编码，得到了令人满意的结果。

一种B超心血管造影分析系统的设计

本系统通过对超声图象进行连续采集以后,对每帧图象的相关区域进行亮度及灰度统计,得出各对应区域的灰度变化曲线,再运用曲线拟合方法对各帧图象的灰度变化作出灰度.时间曲线并计算灰度峰值、峰值时刻、前半峰时间、后半峰时间及曲线下的面积等统计数据.本系统对临床诊断及科研都具有一定的实用价值.

普及型数字减影血管造影系统

本文简要介绍最近研制的普及型数字减影血管造影系统,该系统用普通微机及数字图象存储处理器实现数字减影血管造影。文中对系统的硬件组成,双帧造影图象存储处理器及其电路逻辑框图作了论述,同时对系统的软件结构与功能做简要的介绍。

自适应运动补偿预测图象编码

运动补偿预测编码对帧间图象编码来说是非常有效的技术。然而在图象序列中常会发生运动突变,这将导致大的预测误差。为了减少这类误差,本文提出了一种自适应的运动补偿预测编码方案。它假定运动突变总是发生在轮廓线上,通过计算轮廊线的位移,并将它应用于象素位移迭代的初始化算法中,以使位移计算更加精确。计算机模拟的结果表明,新算法可以极大地减少编码比特率,同时也可获得较好的图象质量。

Real-time traffic information extraction based on compressed video with interframe motion vector

Extraction of traffic information from image or video sequence is a hot research topic in intelligenttransportation system and computer vision. A real-time traffic information extraction method based on com-pressed video with interframe motion vectors for speed, density and flow detection, has been proposed for ex-traction of traffic information under fixed camera setting and well-defined environment. The motion vectors arefirst separated from the compressed video streams, and then filtered to eliminate incorrect and noisy vectors u-sing the well-defined environmental knowledge. By applying the projective transform and using the filtered mo-tion vectors, speed can be calculated from motion vector statistics, density can be estimated using the motionvector occupancy, and flow can be detected using the combination of speed and density. The embodiment of aprototype system for sky camera traffic monitoring using the MPEG video has been implemented, and experi-mental results proved the effectiveness of the method proposed.

普及型数字减影血管造影系统

介绍了最近研制的普及型数字减影血管造影系统，该系统用普通微机及数字图象存储处理器实现数字减影血管造影．文中对系统的硬件组成、双帧造影图象存储处理器及其电路逻辑框图作了论述。