search

ivapylibs / Surveillance

The surveillance system for the SuperviseIt project
0 stars 1 forks source link

The height estimation error is larger in other testing use case comparing to in the testing/height01 #8

Closed yiyeChen closed 3 years ago

yiyeChen commented 3 years ago

In the original testing/height01.py file, the height estimation error is negligible, which is around 0.001 ~ 0.002 meter for all pixels.

However in other test files such as the testing/humanSG02.py, the error goes to 0.1 - 0.2 meter. Further, the error increases when going to the lower part of the image, which clearly indicates that the estimated surface and the real one is no longer the same.

Two possible reason:

  1. The data collection error. Perhaps the camera position changes in the test frame compared to the heigh_estimator parameter calibration frame
  2. The data quality itself. Maybe the depth frame itself has too much noise. This one is less likely since it cannot explain the error pattern along the vertical axis
yiyeChen commented 3 years ago

Collected new data and the result is okay. So the camera's positional change is the cause.

The take away is when collect a new set of data, the calibration needs to be re-done.