Lidar (light detection and ranging) point cloud data contain abundant three-dimensional (3D) information. Dense distribution of scanned points on object surfaces prominently implies surface features.

Abstract: Circles, such as concentric circles, arbitrary coplanar or parallel circles, are often employed for camera calibration. An interesting observation in football or basketball scenes is that a ...

Abstract: In this paper we present a pose estimation algorithm based on four coplanar point correspondences. Given four coplanar points and their corresponding image points under a perspective camera, ...