Just as in a digitizing project, we need to set up parameters before computing the 3D motion data. This is done in the Setup page.
Use the Setup page for setting up the following:
Since all the reference points are fixed points, i.e., their coordinates in the world coordinate system do not change in any frame, the coordinates of reference points only need to be entered in one frame.
At any frame, setting up the initial camera parameters for 3D computation is exactly the same as in a digitizing project.
If all video cameras are fixed cameras, i.e., their parameters remain unchanged during recording, the camera parameters need only be setup and computed in one frame. After the accurate camera parameters are computed, they can be copied to all the other frames. (See 3D computation for fixed cameras).
The initial parameter setup is similar when a camera is dynamic, i.e., its parameters change from frame to frame. There is no need to setup initial parameters in every frame. You just enter the proper initial camera parameters at the frame where the 3D computation is intended to start. The 3D computation will use the previous frame setup if the current frame is not initialized. (See 3D computation for dynamic cameras).