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pageauc / speed-camera

A Unix, Windows, Raspberry Pi Object Speed Camera using python, opencv, video streaming, motion tracking. Includes a Standalone Web Server Interface, Image Search using opencv template match and a whiptail Admin Menu Interface Includes picam and webcam Plugins for motion track security camera configuration including rclone sync script. watch-app allows remotely controller camera configuration from a remote storage service name. Uses sqlite3 and gnuplot for reporting. Recently added openalpr license plate reader support.
Apache License 2.0
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Divide by Zero #81

Closed gregbonnette closed 3 years ago

gregbonnette commented 3 years ago

I can't seem to keep the program stable

After one or two passes of a vehicle it exits with a divide by zero error:

Traceback (most recent call last): File "C:\speed-camera\speed-cam.py", line 1669, in speed_camera() # run main speed camera processing loop File "C:\speed-camera\speed-cam.py", line 1245, in speed_camera cur_ave_speed = float((abs(cur_track_dist / ZeroDivisionError: float division by zero

pageauc commented 3 years ago

This is the code at 1245 

                   if travel_direction == 'L2R':
                        cur_ave_speed = float((abs(cur_track_dist /
                                                   float(abs(cur_track_time -
                                                             prev_start_time)))) *
                                              speed_conv_L2R)

division by zero is something below the / I don't think the cur_track_time - prev_start_time would be zero so I am thinking that the speed_conv_L2R might be causing the problem. Please check you calibration settings in config.py. It might be that one is calculating to a zero value

cal_obj_px_L2R = 80 # L2R Moving Objects, Length of a calibration object in pixels cal_obj_mm_L2R = 4700.0 # L2R Moving Objects, Length of the calibration object in millimetres

Also check

track_counter = 5 # one cpu core=5 four cores=10 Number of Consecutive Motion Events to trigger speed photo

Testing with RPI2 B one core using opencv ver 3.4.2

These are the default settings. Please let me know what your config.py settings are since some value in the formula below the division / is resulting in a zero value being calculated and thus causing the division by zero error.

Let me know Claude ....

pageauc commented 3 years ago

Let me know if you resolved your issue.

gregbonnette commented 3 years ago

Here are my config settings after calibrating:

cal_obj_px_L2R = 70 # L2R Moving Objects, Length of a calibration object in pixels cal_obj_mm_L2R = 4700.0 # L2R Moving Objects, Length of the calibration object in millimetres

track_counter = 5 # one cpu core=5 four cores=10 Number of Consecutive Motion Events to trigger speed photo

Testing with RPI2 B one core using opencv ver 3.4.2

Thanks

pageauc commented 3 years ago

What are the R2L calibration values? Defaults are below

cal_obj_px_R2L = 85
cal_obj_mm_R2L = 4700.0

This is the other lane of traffic. If you are still having problems I recommend you run menubox.sh UPGRADE option to see if that resolves your issue. I have this running on a RPI4 with no issues and have not seen the divide by zero message.

I have one speed camera running on a single core 512 kb RAM memory RPI with not issues if I run as default 320 x240 stream size. Let me know if you still have divide by zero problem Claude ...