@paviro
Oh sorry, I’m sorry I didn’t notice.
But there are the following tips.
where is capture.pgm not in the name of the folder.

Could not detect single face!  Check the image in capture.pgm to see what was captured and try again with only one face visible.

why？

^CTraceback (most recent call last):
  File "capture.py", line 35, in <module>
    capture.capture()
  File "/home/pi/MagicMirror/MMM-Facial-Recognition-Tools/facetrainer/lib/capture.py", line 53, in capture
    if is_letter_input('c'):
  File "/home/pi/MagicMirror/MMM-Facial-Recognition-Tools/facetrainer/lib/capture.py", line 23, in is_letter_input
    input_char = raw_input()
KeyboardInterrupt

Note from admin: Please use Markdown on shell snippets!

Yes, I also have this requirement.

I use the HDMI interface display

@paviro The beginning is normal, after the sensor is triggered, the screen is displayed as the picture., without triggering a black screen. Must restart raspberry pie properly. Do I need to change the display settings?
Sorry, my English is very poor.

Why a bright line is displayed on the screen.
When a sensor is triggered, only a line is displayed on the screen, and how to deal with the problem.