The Theoretical Error of a computed 3D point can be seen in rayCloud when clicking on a point:
- How good the relative reconstruction is in this region.
- If the point needs to be marked on more images.
The Theoretical Error can be visualized with the Error Ellipsoid. See the following example:
The point has been marked on only two images with a small baseline (the distance between the center of the images). As a result, there is a large Theoretical Error in the direction of the rays:
When the point is marked on a new image, the Theoretical Error gets smaller:
For more information on how to visualize the Theoretical Error with an Ellipsoid in the rayCloud: Menu View > rayCloud > Left sidebar > Layers > Tie Points .
In the following example, the point is marked on only 4 images with a small baseline and on one of them (2) it is marked erroneously:
When the point is correctly marked on more images, the following result is obtained:
For more information on how the error of an estimated 3D point is computed and defined: 3D error estimation from tie points.