基于Canny算子和GAC模型相结合的影像水边线提取方法

A Water Edge Extraction Method from Images Based on Canny Operator and GAC Model

从遥感影像上提取弱边缘水边线是影像特征提取的一个难点。在分析了GAC模型和边缘检测算子在影像水边线提取中的优缺点的基础上,提出了一种将Canny边缘检测结果融入GAC模型重构边界停止函数进行水边线提取的方法。实验结果表明,利用该方法进行海岸带遥感影像水边线提取精度高,速度快,即使是弱边缘水边线或水边线严重凹陷边界,在平滑性和精度上都能达到很好的效果。

Extracting water edge,especially weak water edge form remote sensing is also a difficult of image feature extraction.A water edge extraction method from remote sensing image was proposed by introducing Canny detection edges into edge stopping function of GAC（geodesic active contour） model,after analyzing the advantages and disadvantages of the GAC model and Canny edge detection method used in the segment of images.And the experimental results showed that the method proposed in this paper was reliability and fast in water edge extraction of remote sensing image,the good results of the extracted water edges＇ smooth and accuracy could be achieved even in the weak edge and severe concave regions.