针对比率边缘检测算子提出了一种自动确定阈值的方法,该方法引入最佳熵的理论到SAR边缘检测中,把基于比率的边缘检测均值比率影像分割成边缘和非边缘两类。此方法执行起来简单、快速,无需人工干预,能避免人为因素的影响。
A method is proposed to automatically determine the threshold according to the image feature based on ratio edge detector instead of predefining it as before. The principle of optimal entropy into the edge detection of SAR image is introduced, which classifies the intermediate result image of ratio-based edge detector into two classes: edge and non-edge. The presented method performs simply and fast, needless of manual intervention, which can avoid the influence of human factors.