Fig 1.
The illustration of the proposed method.
Fig 2.
The illustration of surface variation of the lung.
Fig 3.
The experiment data in the artificial experiment.
(A) The source point cloud. (B) The artificial motion field.
Fig 4.
Registration error with respect to the number of iteration in the artificial experiment.
Fig 5.
Registration error distribution using non-rigid ICP and the proposed method in the artificial experiment.
(A) Registration error distribution using non-rigid ICP. (B) Registration error distribution using the proposed method.
Fig 6.
Registration error distribution using non-rigid ICP and the proposed method when the number of points in F' is set as 4000 in the 4DCT data experiments.
Table 1.
The registration errors (in millimeters) using CPD, non-rigid ICP and the proposed method in the 4DCT data experiment.
Fig 7.
Illustration of the flowchart in the artificial experiment with corresponding relationship.
Fig 8.
The point clouds before and after registration in the artificial experiments with corresponding relationship.
(A) Overlapped left lung before registration. (B) Overlapped left lung after registration using the proposed method. (C) Overlapped left lung after registration using non-rigid ICP.
Table 2.
The registration errors (in millimeters) using non-rigid ICP and the proposed method in the artificial experiments with corresponding relationship.