CAJ | 학술논문

以我国海岸带为研究对象,从北往南依次选取了覆盖山东青岛、江苏盐城和浙江温州海岸带的6景资源三号(ZY-3)传感器校正产品,利用实测像控点开展了影像自主定位精度评价,并将其结果与覆盖相同区域的SPOT5影像进行了比较。在此基础上,利用实测地面控制点和国家1颐5万比例尺DEM产品对覆盖青岛和温州的全色影像进行了正射校正实验,分析控制点数量与分布对校正精度的影响。研究发现：在无控制点情况下,ZY-3全色影像的平面校正精度平均为19.6 m,多光谱影像的平面校正精度为23.0 m,均优于SPOT5卫星影像的校正精度；用1个角点作为控制点,可达到优于2个像元的校正精度,用4个角点作为控制点,校正精度在1个像元左右；以向陆一侧的2个角点作为控制点,可达到优于3m的校正精度,但采用3个控制点时,校正精度较低,特别是向海一侧影像的校正精度更低。上述研究结果表明,ZY-3影像在少量控制点下即可达到较高的校正精度,能够满足海岸带遥感调查工作的精度要求。
이아국해안대위연구대상,종북왕남의차선취료복개산동청도、강소염성화절강온주해안대적6경자원삼호(ZY-3)전감기교정산품,이용실측상공점개전료영상자주정위정도평개,병장기결과여복개상동구역적SPOT5영상진행료비교。재차기출상,이용실측지면공제점화국가1이5만비례척DEM산품대복개청도화온주적전색영상진행료정사교정실험,분석공제점수량여분포대교정정도적영향。연구발현：재무공제점정황하,ZY-3전색영상적평면교정정도평균위19.6 m,다광보영상적평면교정정도위23.0 m,균우우SPOT5위성영상적교정정도；용1개각점작위공제점,가체도우우2개상원적교정정도,용4개각점작위공제점,교정정도재1개상원좌우；이향륙일측적2개각점작위공제점,가체도우우3m적교정정도,단채용3개공제점시,교정정도교저,특별시향해일측영상적교정정도경저。상술연구결과표명,ZY-3영상재소량공제점하즉가체도교고적교정정도,능구만족해안대요감조사공작적정도요구。
With China's coastal zone as the research area, 6 ZY -3 sensor corrected products were chosen for evaluation, which covered Qingdao of Shandong, Yancheng of Jiangsu and Wenzhou of Zhejiang from north to south. The authors used high accuracy GPS points to evaluate the autonomous positioning precision in comparison with SPOT5 images. Then DOMs were generated with high accuracy GPS points as ground control points( GCPs) and national 1:50 000 DEM products, and the influences of the quantity and distribution of GCPs were analyzed. The results show that the average autonomous positioning precision of ZY -3 panchromatic image and that of multispectral image are 19. 6 m and 23. 0 m, respectively. The autonomous positioning precisions of ZY -3 panchromatic image and multispectral image are better than the precision of SPOT5 images. With 1 GCP at the four corners, the positioning precision of DOM is less than 2 pixels. With 4 GCPs, the positioning precision of DOM is about 1 pixel. With 2 landside corner GCPs, the positioning precision of DOM is less than 3 m. With 3 landside GCPs , the positioning precision of DOM is lower than that of 2 landside GCPs, especially at the seaside. The results show that, with a few GCPs, ZY -3 DOM can reach high accuracy and satisfy the need of coastal zone remote sensing survey.