Plücker直线摄影测量的理论与方法

Using linear features of high-resolution remote sensing images to extract space geographic information is the key research direction of photogrammetry. The existing line photogrammetry methods did not fully utilize the space linear geometric topology, so its geometric constraint conditions is weak. In essence, it is still the traditional point photogrammetry, rather than the "true" line photogrammetry. This project first time puts forward a brand new theory and method of Plücker line photogrammetry. Using Plücker coordinate to represent lines in space, then through the spatial screw movement of Plücker lines in the space, coordinate transformation between image lines and corresponding object lines are finally achieved.Based on the idea above, in-depth study will be launched in geometric topology relationship of coplanar, noncoplanar and overlap Plücker lines, and constructing true linear geometric imaging model, which includes coplanar condition equation, stereo model and bundle adjustment model based on Plücker lines, to enhance the intensity of stereo model and regional network, and improve the geometric positioning accuracy. Meanwhile, extensive line photogrammetry positioning experiments will be done to verify the theoretical results. This study will break the traditional concept of photogrammetry based on points, enrich and develop the theory and technology of true line photogrammetry, expand the application fields of line photogrammetry, and promote the development of Earth Information Science and Technology.

利用高分辨率遥感影像上的直线特征提取空间地理信息是摄影测量的重点研究方向。现有的直线摄影测量没有充分利用直线的几何拓扑关系，几何约束强度弱，在本质上仍是传统点摄影测量，而非"真"直线摄影测量。本课题首次提出Plücker直线摄影测量的全新理论和方法，将空间直线用Plücker坐标表示，通过Plücker直线在空间中的螺旋运动，实现像方直线到其对应地面直线物方坐标的变换。深入研究空间Plücker直线间的共面、异面和重合的几何拓扑关系，构建真直线几何成像模型，包括Plücker直线共面条件方程、立体模型和区域网平差模型，从而增强立体模型和区域网的几何强度，提高几何定位精度。同时，进行直线摄影测量几何定位实验，验证本课题的理论研究成果。该研究可望破除传统的、非本质的摄影测量理念的束缚，丰富与发展真直线摄影测量的理论和技术方法，拓展直线摄影测量的应用领域，推进地球信息科学与技术的发展。