Face Recognition System Python

face recognition

Face Recognition System in Python is a biometric technology capable of recognizing and verifying an image or video of an individual.

Facial recognition allows one to identify the system administrator.

Today, this biometric system plays a very important role in the protection of smartphones and consumers.

Let’s Code face Recognition System in Python!

Face-Recognition
Face-Recognition | Source – Divyanshu Shekhar

Also, learn Basic OpenCV Operations.

why you should learn OpenCV in Python?

Installing Packages for Face Recognition in Python

Install Face Recognition Package from Python:-

pip install face-recognition

If you get CMake and dlib error, also install CMake and dlib to solve the problem.

pip install cmake

pip install dlib

Also Install Pillow, for image manipulation, drawing shapes on images and text on images for writing names of the person.

pip install Pillow

Face Recognition Python Algorithm

Steps to follow to make a Facial Recognition System. You can also make this system for Hardware like Raspberry pi / Arduino projects.

1.Import the needed packages.

import face_recognition

from PIL import Image, ImageDraw, ImageFont

2. Load image of the person

Load the image of the person on which you want to try facial recognition.

image_of_person = face_recognition.load_image_file(‘./img/face_models/person.jpg’)

3. Store Face Encoding

This Process stores the facial features of the person.

person_face_encoding = face_recognition.face_encodings(image_of_person)[0]

4. Create List of Encodings and Names

Create a list of face encodings with the values of face encodings of every selected face model. Also, create a list of face names that will map the names of the matched persons.

Note:- The face encodings list and the face names list must be in the correct order. Otherwise, the names will be displayed in the wrong order and thus the Facial recognition system will be a failure.

known_face_encodings = [ person_face_encoding ]

known_face_names = [ “Name of the Person” ]

5. Load the Test Image

Load the image in which you want to recognize your face.

test_image = face_recognition.load_image_file(‘./img/test_image.jpg’)

6. Find Face locations & Encodings in test_image

This process stores the face location of every face in the test image and then stores the face encoding of every face using its face location, stored in the previous step.

face_locations = face_recognition.face_locations(test_image)

face_encodings = face_recognition.face_encodings(test_image, face_locations)

7. Create test_image to PIL format

pil_image = Image.fromarray(test_image)

Create an Instance of ImageDraw, because we have to draw a rectangle on the matched faces and display the text of the matched names of the person, using ImageDraw instance.

draw = ImageDraw.Draw(pil_image)

8. Recognize Faces

Loop through every face in the test image and compare the face encodings with each face.

If any of the faces in test_image matches the face encoding of the person, then a rectangle is drawn on the face and the person’s name is labeled on it.

If the person’s face doesn’t match with any of the faces in the test image then the default value of the name i.e “Unknown Person” is labeled on the face.

# Loop through faces in test image
for (t, r, b, l), face_encoding in zip(face_locations, face_encodings):
    matches = face_recognition.compare_faces(
        known_face_encodings, face_encoding)

    name = "Unknown Person"

    # IF MATCH
    if True in matches:
        first_match_index = matches.index(True)
        name = known_face_names[first_match_index]

    #  Draw Box
    draw.rectangle(((l, t), (r, b)), outline=(0, 255, 0))

    # Draw label
    text_width, text_height = draw.textsize(name)
    draw.rectangle(((l, b - text_height - 90), (r, b)),
                   fill=(0, 0, 0), outline=(0, 255, 0))
    draw.text((l+6, b-text_height-75), name, fill=(0, 255, 0), font=font)

del draw

# Display image
pil_image.show()

Face Recognition Python GitHub

For the Source Code of the facial recognition system, visit the GitHub Page.

Source Code Facial Recognition

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How to Load Image File in Face Recognition in Python?

image_of_person = face_recognition.load_image_file(‘./img/face_models/person.jpg’)

How to store face encoding in Face Recognition Python?

person_face_encoding = face_recognition.face_encodings(image_of_person)[0]

How to find Face location in an Image using Face Recognition in Python?

face_locations = face_recognition.face_locations(test_image)

Find Face Encoding in an Image.

face_encodings = face_recognition.face_encodings(test_image, face_locations)

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