Simplified Occlusion handling
An Object being in the camera image and blocking the tracking can easily happen and be overseen on execution. This results in very tedious tasks, because trajectories are broken and have to be manually edited for every person walking past the object.
Add a possibility to handle such situations. Since complete and reliable occlusion tracking is very difficult and open field of research, it should be overkill to implement it in petrack, because this case of an object occluding the scene is more of a niche case.
A simplified and semi-automatic handling should suffice. With semi-automatic it is meant to mark an area in the video which a blocking (non-moving) object. Inside this area, petrack searches for endings of trajectories, that are near in relation to time. Let they be called hits.
In a second step, the user is prompted one hit after another, where he/she can resolve the issue manually.
Prompted means, that the video jumps to the location and shows the critical trajectories. After resolving the user is prompted with the next hit and so on.
This will already help much in the rare cases of an object occluding the scenery.