search

billw2 / pikrellcam

Raspberry Pi motion vector detection program with OSD web interface.
GNU General Public License v3.0
262 stars 70 forks source link

night vision. #29

Closed arnauldb closed 7 years ago

arnauldb commented 7 years ago

Hello,

when using a night vision system, this camera: Raspberry Pi Camera Board - Night Vision (5MP), https://www.modmypi.com/raspberry-pi/camera/camera-boards/raspberry-pi-camera-board-night-vision-5mp and when motion detection is on, I have a lot of false detections and it records even when there is nothing moving. I guess it is due to the IR leds, but I am not sure. Do you have any clue or advice for this?

here is a screencast I did when motion is on: https://youtu.be/TJ1LpKHq220

Thank you,

billw2 commented 7 years ago

On Thu, 06 Jul 2017 13:36:43 -0700 arnauld notifications@github.com wrote:

Hello,

when using a night vision system, this camera: Raspberry Pi Camera Board - Night Vision (5MP), https://www.modmypi.com/raspberry-pi/camera/camera-boards/raspberry-pi-camera-board-night-vision-5mp and when motion detection is on, I have a lot of false detections and it records even when there is nothing moving. I guess it is due to the IR leds, but I am not sure. Do you have any clue or advice for this?

here is a screencast I did when motion is on: https://youtu.be/TJ1LpKHq220

Thank you,

-- You are receiving this because you are subscribed to this thread. Reply to this email directly or view it on GitHub: https://github.com/billw2/pikrellcam/issues/29

Under some lighting the camera generates a lot of noise vectors and the IR level may be at the problem level. If you turn on the display of "Vectors" you can see the noise and that can give a good idea of the cause of the detects.

The light level during the video seems to fluctuate and that doesn't help. When you look at the vectors, you may see them clustered around the vertical line of the wall corner and it may help to set motion regions that do not cross straight line divisions of light like that corner.

Bill

-- Bill Wilson billw@gkrellm.net

arnauldb commented 7 years ago

"When you look at the vectors, you may see them clustered around the vertical line of the wall corner and it may help to set motion regions that do not cross straight line divisions of light like that corner."

that was right, I moved the camera and no more noise vectors, I should have tried this before. Here is my new test: https://youtu.be/ul-UgSd2QQ8

Thank you for the advice and PikrellCam.