CAJ | 학술논문

针对我国西部高原湖区资源卫星遥感监测与应用需求,开展资源一号02C星( ZY-102C)图像水体信息提取方法研究。用归一化植被指数和归一化差异水体指数进行龙羊峡库区水体信息提取,并将二者结合,提出决策树水体信息提取方法。以人工解译的水体区域为参考,对水体区域的整体提取结果、细节提取结果和误提取率进行统计和对比分析。实验结果表明,NDVI法易受到薄云的影响,但受冰雪和地形的影响较小； NDWI法在冰雪、薄云和山体阴影等成像条件下会受到不同程度的影响；决策树法虽然受山体阴影等地形的影响较大,但是能有效地消除冰雪和薄云等气候环境的干扰。
침대아국서부고원호구자원위성요감감측여응용수구,개전자원일호02C성( ZY-102C)도상수체신식제취방법연구。용귀일화식피지수화귀일화차이수체지수진행룡양협고구수체신식제취,병장이자결합,제출결책수수체신식제취방법。이인공해역적수체구역위삼고,대수체구역적정체제취결과、세절제취결과화오제취솔진행통계화대비분석。실험결과표명,NDVI법역수도박운적영향,단수빙설화지형적영향교소； NDWI법재빙설、박운화산체음영등성상조건하회수도불동정도적영향；결책수법수연수산체음영등지형적영향교대,단시능유효지소제빙설화박운등기후배경적간우。
Taking into consideration the needs of the remote sensing monitoring and application with Chinese resource satellite in west highland lakes, the authors carried out research on water extraction method by using ZY-1 02C satellite images. The two traditional spectral indexes i. e. , the normalized difference vegetation index(NDVI) and the normalized differential water index( NDWI) , were used to extract the water bodies in Longyangxia reservoir and, by combining these two kinds of water extraction method, a decision tree water extraction method was presented in this paper. Taking the manual interpretation of the water region as the reference,the authors used the overall area of the water extraction results, the detail extraction and the rate of error extraction results to make statistic and comparative analysis. The experimental results show that the NDVI method is susceptible to the influence of thin cloud, but is less affected by snow and terrain. Under the imaging conditions of snow,thin cloud and mountain shadows,the NDWI method is subject to different degrees of impact. In spite of the fact that it is susceptible to mountain terrain effects such as shadows,the method of the decision tree can effectively eliminate the interference of climate conditions such as snow and thin cloud.