overlap threshold {0.5, 0.25, 0.25} need to be changed as official {0.7, 0.5, 0.5}

[nyg2017]

There is a problem in eval code(evaluate_object_3d_offline.cpp), the overlap threshold should be changed as official {0.7, 0.5, 0.5}. Now it's {0.5, 0.25, 0.25}(for 3d and image/ground plane).

[pyun-ram]

The minimum overlap threshold for 2D evaluation on the image/ground plane and 3D evaluation is indeed
0.7, 0.5, 0.5 for car class. Please check again. :)

[nyg2017]

The minimum overlap threshold for 2D evaluation on the image/ground plane and 3D evaluation is indeed
0.7, 0.5, 0.5 for car class. Please check again. :)

why the code in FL3D/VoxelNet/kitti_eval/evaluate_object_3d_offline.cpp
line54 is：
const double MIN_OVERLAP[3][3] = {{0.7, 0.5, 0.5}, {0.5, 0.25, 0.25}, {0.5, 0.25,0.25}};`
and I evaluate the validation dataset by the evaluate code of project "qianguih/voxelnet".
It's totally different.

[pyun-ram]

In MIN_OVERLAP Matrix: {{0.7, 0.5, 0.5}, {0.5, 0.25, 0.25}, {0.5, 0.25,0.25}},
each row is for a specific task: 2D evaluation on the image plane, 2D evaluation on the ground plane and 3D evaluation.
Each column is for a specific class: car, pedestrian, cyclist.
This code coincides with https://github.com/prclibo/kitti_eval.
Of course, you can change this cpp for whatever you need. :)