 Thanks to the line flow representation, the corresponding 2D line segment in a new frame can be predicted based on 2D and 3D line segment motions .
<clarity>  Thanks to the line flow representation, the corresponding 2D line segment in a new frame can be predicted based on 2D and 3D line segment motions .
 Thanks to the line flow representation, the corresponding 2D line segment in a new frame can be predicted according to their corresponding 3D line segment motions .