How to generate the json file?

[nyg2017]

Thanks for your work! I wonder to know how to generate the json label file? I notice that the marks parameters in json label files are added 2 value relative to the .mat label file. What are those parameters mean and how to calculate this extra parameters? Looking forward for your response.

[Teoge]

The label files are first generated using the directional_point branch of my labeling tool MarkToolForParkingLotPoint, and then converted to json format using mat2json.m.

The directional_point branch labels an additional point for each marking-point. The additional two values in a "marks" label are the location of this point. Together with the first two values in a "marks" label, they indicate the orientation of a marking-point.