台风螺旋云带骨架跟踪方法的研究

在螺旋云带骨架线的跟踪中利用链码的预测搜索技术和平均链码的概念提出了一种骨架的自动跟踪方法。在跟踪中遇到交叉点时，利用紧邻交叉点的已踊跃编码过的一般象素点的编码信息，用最小二乘法向前作线性预测，求出交叉点处下一步的预测搜索方向，当用线性预测方法无线求出预测方向时，则计算交叉点前的已踊跃编码过的一段象素点的平均链码值作为预测搜索方向，最后以交叉点的各邻点方向中与预测搜索方向最接近的方向作为下一点的搜索方向。该方法有效地克服了基于链码的跟踪在交叉点处容易发生迷向的现象，同时跟踪速度和自动化程度得到了较大的提高。

The Study on Automatic Tracking Method of Typhoon Spiral Cloud Bands

In this paper, an automatic skeleton tracking method is proposed according to the linear predicting technique based on chain code and the concept of average chain code. In this method, when encountering an intersect during tracking, firstly, linear predicting technique is used to calculate the track direction at intersects based on chain code sequence of a section of tracked pixels adjacent to the intersect. When the linear predicting is an insolvable problem, the average chain code of pixels tracked can be calculated as predicted direction. Then refer to predicted direction, the nearest direction of all neighboring directions to predicted direction at intersect can be used as the tracking direction at intersect. During the course of tracking the skeleton of typhoon spiral cloud bands, this method effectively overcome the defect of direction lost at intersect based on chain code, and the speed and automation of tracking is also improved.