改进的小波域医学图像序列的运动估计

An Improved Motion Estimation of Medical Image Series Via Wavelet Transform

医学图像序列压缩是远程医疗系统中的重要技术,而运动估计在视频序列压缩中起着关键作用。我们提出了一种改进的正方形-菱形搜索算法来实现医学图像序列的运动估计。这种改进的正方形-菱形算法减少了搜索点数。我们将其应用于小波域的医学图像序列的运动估计,并对数字减影血管造影图像序列(DSA)进行实验。结果表明,改进后的小波域正方形-菱形算法较其他算法精度高。

The compression of medical image series is very important in telemedicine. The motion estimation plays a key role in the video sequence compression. In this paper, an improved square-diamond search（SDS） algorithm is proposed for the motion estimation of medical image series. The improved SDS algorithm reduces the number of the searched points. This improved SDS algorithm is used in wavelet transformation field to estimate the motion of medical image series. A simulation experiment for digital subtraction angiography（DSA） is made. The experiment results show that the algorithm accuracy is higher than that of other algorithms in the motion estimation of medical image series.