关键词: 遥感, 水体提取, 混合像元分解, 高光谱影像

Abstract: A water boundary extraction method based on hyper spectral mixed pixel decomposition is proposed in this paper to solve the problem of precision loss caused by water boundary mixed pixel.The method which is combined with the spectral characteristics of the hyper spectral images obtains the mixed pixels of the water boundary with weakening the impact of many factors on the pixel boundary recognition to reduce the computation amount of the mixed pixel decomposition.The precision of the boundary definition of water body can be significantly improved by approaching the true boundary of the water body with the high precision decomposition of mixed pixel and the segmentation of water boundary pixel.The experimental results show that the accuracy of the method is better than that of the water index method,which is slightly better than the support vector machine.The overall accuracy of this method is 93.86%,and the Kappa coefficient is 0.87.

Key words: remote sensing, water body extraction, mixed pixel decomposition, hyper spectral image