CIALUG June 2019: Raspberry Pi Facial Recognition

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Andrew Denner

a Machine learning doorbell

Software

WELCOME TO LUG
• Linux news?
• CIALUG.org
• List serve
• IRC/SLACK

ABOUT ME
• Software Developer by day
• Linux guy by night
• @adenner
• Slides will be at denner.co later and posted

FACIAL RECOGNITION
ON A PI
Andrew Denner Central Iowa Linux User’s Group
June 19, 2019

IF I HAVE SEEN THIS FAR…
• Most of today is from directions
and code at
https://www.pyimagesearch.com/
2018/06/25/raspberry-pi-
face-recognition/
• And
• https://www.pyimagesearch.
com/2018/06/11/
how-to-build-a-custom-face-
recognition-dataset/

WHAT IS THE OSS/LINUX TECH
STACK WE ARE USING TODAY
• On the pi (rasberian pi)
• Python3
• opencv

FIRST MUST INSTALL STUFF
This assumes that you have a real computer with a gpu to do training…
And a pi to run the model on (optional)
python3 -m pip install dlib face_recognition imutils opencv-contrib-python
You may also need cmake (apt-get install cmake)
(note in this case we are being explicit what version of python we are getting,
python 2 is dead, long live python)

LETS BUILD A DATASET
• In order to train our model we need photos first, there are several ways to
get this, facebook, bing image search or in our case lets just take some
snapshots
• https://www.pyimagesearch.com/2018/06/11/how-to-build-a-custom-face-
recognition-dataset/
• python3 build_face_dataset.py --cascade
haarcascade_frontalface_default.xml --output dataset/andy

NOW THAT WE HAVE DATA-–LETS ENCODE
• python3 encode_faces.py --dataset dataset --encodings encodings.pickle --
detection-method hog (if on pi)
• python3 encode_faces.py --dataset dataset --encodings encodings.pickle --
detection-method cnn (on a real computer)
• Especially if you have an underpowered laptop, this could take a bit!

AFTER TRAINING TRANSFER TO THE PI
• After the training finishes transfer the pickle file and the code we want to run
to the pi and run the recognition code.
• python3 pi_face_recognition.py --cascade
haarcascade_frontalface_default.xml --encodings encodings.pickle

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CIALUG June 2019: Raspberry Pi Facial Recognition

2. WELCOME TO LUG • Linux news? • CIALUG.org • List serve • IRC/SLACK

3. ABOUT ME • Software Developer by day • Linux guy by night • @adenner • Slides will be at denner.co later and posted

4. FACIAL RECOGNITION ON A PI Andrew Denner Central Iowa Linux User’s Group June 19, 2019

5. IF I HAVE SEEN THIS FAR… • Most of today is from directions and code at https://www.pyimagesearch.com/ 2018/06/25/raspberry-pi- face-recognition/ • And • https://www.pyimagesearch. com/2018/06/11/ how-to-build-a-custom-face- recognition-dataset/

6. WHAT IS THE OSS/LINUX TECH STACK WE ARE USING TODAY • On the pi (rasberian pi) • Python3 • opencv

8. FIRST MUST INSTALL STUFF This assumes that you have a real computer with a gpu to do training… And a pi to run the model on (optional) python3 -m pip install dlib face_recognition imutils opencv-contrib-python You may also need cmake (apt-get install cmake) (note in this case we are being explicit what version of python we are getting, python 2 is dead, long live python)

9. LETS BUILD A DATASET • In order to train our model we need photos first, there are several ways to get this, facebook, bing image search or in our case lets just take some snapshots • https://www.pyimagesearch.com/2018/06/11/how-to-build-a-custom-face- recognition-dataset/ • python3 build_face_dataset.py --cascade haarcascade_frontalface_default.xml --output dataset/andy

10.

11. An example training image

12. NOW THAT WE HAVE DATA-–LETS ENCODE • python3 encode_faces.py --dataset dataset --encodings encodings.pickle -- detection-method hog (if on pi) • python3 encode_faces.py --dataset dataset --encodings encodings.pickle -- detection-method cnn (on a real computer) • Especially if you have an underpowered laptop, this could take a bit!

13. AFTER TRAINING TRANSFER TO THE PI • After the training finishes transfer the pickle file and the code we want to run to the pi and run the recognition code. • python3 pi_face_recognition.py --cascade haarcascade_frontalface_default.xml --encodings encodings.pickle

14. DEMO TIME

CIALUG June 2019: Raspberry Pi Facial Recognition

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