一种局部平差影像添加策略的三维重建方法

The 3D-reconstruction based on a new strategy of adding images

针对现有三维重建算法在仍存在影像丢失和在弱连接区域平差失败的现象,该文提出一种采用局部平差影像添加策略的三维重建方法。该方法在影像选取时,采用局部平差,平差后选取限差合格的连接点,根据符合限差点的数量选取下一张影像,从而保证了连接点的质量;在全局平差阶段,按照局部平差计算的限差添加连接点,从而保证全局平差尽可能地成功。经测试,所提方法仍可以提高重建的稳定性,降低经验筛选对影像添加过程的影响,在影像连接关系弱、经验筛选不足的区域有明显优势。

Aiming at the the limitation that still existed in the existing three-dimensional reconstruction algorithm,such as some images could not add to reconstruction and the global bound adjustment often failed in the pair which had weakly connected,this paper proposed a new threedimensional reconstruction strategy which adopted a new image selection strategy and adaptive threshold global bound adjustment.The image selection strategy first had a local adjustment to the new join points,then selected the qualified connection points that their reprojection error was less than the limit;finally,select the image to be added,according to the number of connection points after adjustment.The threshold estimated by the local bound adjustment report,in order to ensure the global bound adjustment success.Experimental results showed that our method could improve the stable of the three-dimensional reconstruction and reduce the requirement of two view geometry based on experience.The algorithm had good performance of the pair which had weakly connected.