基于子块特征的遥感图像边缘灰提取

Remote Sensing Image edge extraction based on gray correlation analysis and block feature

遥感图像为地理信息系统数据的更新和应用提供了有利条件,遥感图像的特征提取是其中的关键问题。针对灰色绝对关联度计算模型的特点,提出一种基于灰色绝对关联度和图像子块标准差的边缘检测算法,实现遥感图像边缘灰提取过程中阈值的自适应调整。实验结果表明本文算法能有效提取图像弱边缘,具有很好的实用性。

Remote sensing image provides the condition for Updates and application of GIS and edge extraction is important in the process. According the feature of gray absolute correlation degree, an edge detection method based on ray absolute correlation degree and standard deviation of Image sub-block is given, and the threshold is adaptive in the method. The experimental results show that the method has high efficiency, and it detects more week edges.