基于遥感图像分析的城市森林景观退化趋势测量技术

摘要

为全面反映城市生态平衡建设情况,弥补当前城市森林景观退化趋势测量方法的缺陷,提出基于遥感图像分析的城市森林景观退化趋势测量方法.使用Vgtextract软件对城市森林景观遥感图像的长时序数据进行去噪和提取,并分波段提取图像分辨率数据.通过分析地理分区相似性,对提取出的图像数据进行边缘分割,获取图像中的城市森林景观,计算城市森林景观指数并集成.将城市不同时期的集成指数相减得到退化数据,用来描述城市森林景观退化趋势.实验结果表明,所提测量方法对遥感图像中城市森林景观的分割效果好,测量偏差小.%In order to comprehensively reflect the construction condition of urban ecological balance,and eliminate the de-fects of the current measurement method for degradation trend of urban forest landscape,a measurement method based on re-mote sensing image analysis is proposed for degradation trend of city forest landscape. The Vgtextract software is used to denoise and extract the long time series data in remote sensing image of urban forest landscape,and also extract the image resolution da-ta in the mode of dividing wave band. By analyzing the similarity of geographical subareas,the edge segmentation is carried out for the extracted image data to acquire the urban forest landscape in the image,and calculate the urban forest landscape index for integration. The integrated indexes of different periods of the city are subtracted to get the degradation data for description of the urban forest landscape degradation trend. The experimental results show that the proposed measurement method has good seg-mentation effect of urban forest landscape in remote sensing images,and small measured error.