In this lesson we learned about track in a 3D scene. Unlike the 2Dtrack I learned last semester, 3D needs to allow the camera to calculate a specific 3D space, and more tracking points are needed. Therefore, it is divided into several steps.
1. Set the number of tracked points reasonably (such as 300 to 500) and let the camera calculate automatically. Solve it after the calculation.
2. Delete the point where the operation failed, which will interfere with the operation result. The red dots didn’t catch up. Make sure its error value is below a certain value (1 is best). Then update the solve.
3. Establish a flat surface. To ensure that the camera’s computation is a correct 3D space, we can select multiple points to tell the camera that it is a plane (choosing a floor is best, otherwise it will cause the space to be reversed).
4. Done. Create a scene+. The small arrow adds a series of associated nodes together.
5. Verify it and use a plane to determine the success of the trace.
