Analyzes the colors of the pixels

MIT App Inventor Help
1

Hi,
some help please...
I created an app that analyzes the colors of the pixels in a photo to determine if any elements are present.
Now I have this need, that is, I have to take the photo with an external camera.

  1. Can I use the external camera like the internal one via an extension?
  2. Otherwise could I take the photo with Arduino or Raspberry and send it via Bluetooth to the app?
    Or what do you recommend? ideal would be point 1...
    Thank you.
2

grafik

Same image zoomed in:

Summary

grafik
grafik1428×1140 290 KB

3

the image I need to analyze has a high color difference between the background and the element to be checked...

4

what do you think about it?