测绘学报 ›› 2017, Vol. 46 ›› Issue (7): 874-881.doi: 10.11947/j.AGCS.2017.20160588

• 摄影测量学与遥感 • 上一篇    下一篇

仅用虚拟控制点的超大区域无控制区域网平差

杨博1,2,3, 王密2,3, 皮英冬4   

  1. 1. 武汉大学计算机学院, 湖北 武汉 430072;
    2. 地球空间信息协同创新中心, 湖北 武汉 430079;
    3. 武汉大学测绘遥感信息工程国家重点实验室, 湖北 武汉 430079;
    4. 武汉大学遥感信息工程学院, 湖北 武汉 430072
  • 收稿日期:2016-11-23 修回日期:2017-06-07 出版日期:2017-07-20 发布日期:2017-07-25
  • 通讯作者: 王密 E-mail:wangmi@whu.edu.cn
  • 作者简介:杨博(1984—),男,博士,助理研究员,研究方向为光学遥感影像的高精度几何处理。
  • 基金资助:
    国家重点研究发展计划(2016YFB0501402);国家自然科学基金(41601429;91638201)

Block-adjustment without GCPs for Large-scale Regions only Based on the Virtual Control Points

YANG Bo1,2,3, WANG Mi2,3, PI Yingdong4   

  1. 1. Computer of School of Wuhan University, Wuhan University, Wuhan 430072, China;
    2. Collaborative Innovation Center of Geospatial Technology, Wuhan 430079, China;
    3. State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan 430079, China;
    4. School of Remote Sensing and Information Engineering, Wuhan University, Wuhan 430072, China
  • Received:2016-11-23 Revised:2017-06-07 Online:2017-07-20 Published:2017-07-25
  • Supported by:
    The National Key Research and Development Program of China (No. 2016YFB0501402);The National Natural Science Foundation of China (Nos. 41601429;91638201)

摘要: 利用光学卫星影像进行无控制测图是摄影测量追求的目标。针对超大区域无控制测图的需求,本文提出了一种以单景影像为平差单元,基于虚拟控制点的光学卫星影像超大规模无控制区域网平差方法。该方法利用待平差影像的初始RPC模型生成虚拟控制点,并将其作为带权观测值引入平差模型中以改善平差模型的状态,克服了在无控制点条件下平差精度不稳定、误差过度累积引起的网的扭曲变形等问题。为了验证本方法的有效性和精度,利用资源三号卫星获取的覆盖全国的26 406景影像进行区域网平差试验,并利用全国范围内分布的约8000个高精度控制点对平差后自动生产的DOM和DSM产品的几何精度进行验证。试验结果表明,平面和高程中误差均达到了4 m以内,同时,区域网内部相邻影像之间的几何拼接精度优于1个像素,满足无缝拼接的要求。

关键词: 资源三号, RFM, 区域网平差, 光学影像, 虚拟控制点

Abstract: Mapping from optical satellite images without ground control points (GCPs) is one of the goals of photogrammetry. Aiming at the mapping without GCPs, a large-scale block adjustment method based on the virtual control points is proposed in this paper, in which the single image is regarded as an adjustment unit to be organized. To overcome the block distortion caused by unstable adjustment without GCPs and the excessive accumulation of errors, the virtual control points created by the initial RPC model of the images are regarded as the weighted observations and introduced into the adjustment model to refine the adjustment. To verify the availability and the accuracy of the presented method, 26 406 three-linear-array images of ZY-3 covering China are used as the basic data and 8000 uniformly distributed high precision check points are applied to evaluate the geometric accuracy of the DOM (digital ortho model) and DSM (digital surface model) production. The experimental results indicate that the standard deviations of plane and elevation are both better than 4 m and the mosaic accuracy of neighboring DOM is within better than 1 pixel, which could meet the demand of seamless mosaic.

Key words: ZY-3, RFM, block adjustment, optical images, virtual control points

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