Page 6 - Newsletter_September_2026

I kept the system that uploads the files to Google, but I added another PI to interrogate the streams from
both cameras to detect motion and email me the results.
MotionEyeOS could have emailed me the results – but I wanted a little more control, so:-

I have the ‘bigger’ picture from the camera uploaded to Google whenever some motion occurs
I have tiny areas of the picture by the front door and the garden gate selected to be checked
for motion and then these are emailed to me using my own system

So BIG pictures that I can view from anywhere as long as I have internet – and emails sent to me when
someone arrives at the front door or garden gate.

Open-Source Computer Vision library

If appropriate steal code or ideas from someone who has done something similar.

On my home-grown system I decided to check two small areas for any movement.
The recommendations I found were – turn the images to monochrome

Cut out the area required
Compare the new image with a previous image

If the images were different by an average value (say 20 – this value is found by trial and error) – record the
original whole image and send it to the email.