基于HJ-1B数据分形特征的水面面积提取方法研究

A method of extraction of water surface area based on fractal signature of HJ-1B

以巢湖为研究区域,提出了一种基于HJ-1B数据分形特征的水面面积提取方法。首先利用地毯法计算像元的分形信号,并对其进行特征分析;其次选用下分形第3尺度进行水面面积提取;最后利用同时期统计年鉴数据对提取结果进行精度评价。实验结果表明,该方法可以快速有效地提取水面面积,也为今后水体信息提取的相关研究提供了一种新的思路。

A method of extraction of water surface area based on fractal signature of H J-1 B is presented in the work and applied in Chaohu lake. Firstly, the blanket method is used for computing fractal dimension of each pixel, and corresponding characteristic concerning water surface is analyzed. Secondly, the third down fraetal signature is chosen to extract water surface area. Accuracy assessment for the extraction result is done based on statistical yearbook data of the same period. The method developed in this study can effectively extract water surface area and provides a reference for further related research on water information extraction.