A straightline detection algorithm base on curvetracing was proposed.
在此基础上，提出了一种基于曲线跟踪的直线检测算法。
2
Two ASG algorithms, a curvetracing algorithm and a marking-point tracing algorithm, are introduced in detail and illustrated in examples.
为此提出两种自动添加支撑算法：曲线追踪法和标志位追踪法。
3
The system of automatic boundary data acquisition can obtain the curve data of the endocardium boundary of left ventricle with the tracing algorithm of the gradient image edge.