摘要
针对基于形状的遥感图像检索中区域分割困难这个问题,本文提出利用边缘角度直方图作为形状特征对遥感图像进行检索;针对遥感影像分辨率和颜色反差对检索性能的影响,本文提出采用多尺度分析的思想,提取图像在多个尺度上的边缘角度直方图特征进行检索。通过单一尺度边缘角度直方图特征和多尺度边缘角度直方图特征检索的对比实验,揭示了本文所提出的改进方案使遥感图像的检索精度提高了约31个百分点。
Aiming at the difficulty of segmenting regions in the remote sensing retrieval based on shape feature, this paper introduced a method that retrieval remote sensing image using edge angular histogram as shape index. Considering the influence produced by remote sensing image resolution and colour contrast, the author addressed the idea of multiscale analysis that extracting the edge angular histogram on muhiscale image. At last, the comparative experiment between single scale edge angular histogram and multiscale edge angular histogram indicated that the precision of the retrieval was improved for about 31 percents.
出处
《测绘科学》
CSCD
北大核心
2008年第6期70-72,共3页
Science of Surveying and Mapping
关键词
边缘角度直方图
基于内容的图像检索
多尺度边缘检测
遥感
edge angular histogram
content-based image retrieval
muhiscale edge detection
remote sensing
