Abstract: A novel algorithm-TSEL is proposed for contour extraction in this paper.The algorithm uses noise filter and threshold to enlarge the difference between object and background，and then uses sequential edge linking algorithm to get continuous and accurate contour.Experiments show the robustness of this algorithm when it is used to the low SNR image.

摘要： 提出了一种阈值化顺序边缘连接（Threshold Sequential Edge Linking，TSEL）的图像轮廓提取算法。该算法针对SEL算法在信噪比较低的情况下会出现边缘断裂和伪边缘的问题，通过滤波去噪和阈值分割增强图像前景与背景之间的差异，再对预处理后的图像运用SEL算法，从而得到连续、准确的边缘轮廓。实验表明，该算法对低信噪比图像具有较强的鲁棒性。