Based GCP-SGM Algorithm and Its Application in Scene 3D Reconstruction of Archaeological Excavation Site

Aiming at the big scene 3D reconstruction of archaeological excavation site, in the paper, a method which based on photogrammetry and computer vision is put forward with Qinshihuang's acrobatics figurines pits archaeological excavate as example. Getting multi-strip sequence images usednon-metric digital camera,based on the control points laying the bottom of the excavation site, the exterior orientation elements of the image is measured accurately and the feature matching tie points of the images and epipolar image can be acquired by aerial triangulation. On the basis, the SGM (semi-global matching) algorithm with the additional control point constraint is used for stereo dense image matching.The per-pixel dense matching results are calculated by space intersection.at the same time,the dense color three-dimensional point cloud which reflects the cultural relics archaeological excavation site location information is obtained,and to achieve the 3D reconstruction of cultural form in archaeological excavation process. Experimental results show: the method given by this paper can achieve rapid measurement of 3D reconstruction for the big scene of archaeological excavation site, and the orthophoto map which reflects the distribution of cultural relic site is obtained at the same time, The proposed method can provide the accurate distribution of dig site cultural relic and scientific basis in archaeological excavation, survey, site protection planning and so on for related fields studying.