Use background subtractor from OpenCV to generate heat map from any recordings. The camera must be static.
background_diff(filename, frame_num = -1, bkg_construct_frame = 800, frame_freq = 10, mv_avr_width = 70, post_process = False, video_save_path = 'out.mp4', post_process_method="BLUR")
Parameters:
- filename: Path to input file.
- frame_num: Frames to use as input, -1 means all frames in the original file.
- bkg_construct_frame: Frames to use for constructing the background subtractor.
- frame_freq: Frequencty of sampling.
- mv_avr_width: Width of the moving average. This decides the second returned output.
- post_process: Post process method on reducing noises.
- post_process_method: Method of post process, "BLUR" or "MORPH".
- video_save_path: Path to save the output video. If that's not needed, just delete the relevant code.
select_from_heatmap(hmap,FILENAME)
Parameters:
- hmap: A heat map image. Must be in the format np.uint8.
- FILENAME:: Path to input file.
See notes in the notebook.
A sample frame from a surveillance camera in some company.
