IM07813/RealTime-Face-ID_opencv

waqar ahmed

Data Scientist

ML Engineer

Data Analyst

Python

PyTorch

Artificial Intelligence

Face Recognition System

This project is a real-time face recognition system that captures, trains, and recognizes faces using OpenCV, Dlib, and Support Vector Machine (SVM) for classification. The system captures images, trains a model using a facial feature extraction method, and recognizes faces in real time using a web camera.

Features

Image Capture: Captures images from a webcam and stores them in a specified folder for each person.

Feature Extraction: Extracts facial features using Dlib's face recognition model and 68-face landmarks.

Training: Trains an SVM classifier to identify the faces using extracted features.

Face Recognition: Recognizes faces in real time by comparing webcam footage with the trained model.

Additional Features:

Detects lighting intensity.

Estimates rough distance of the person from the camera.

Displays a face mesh over detected faces.

Installation

Follow the steps below to get the project up and running on your local machine.

Prerequisites

Python 3.7+

OpenCV

Dlib

Scikit-learn

NumPy

Pickle

Install Required Libraries

pip install opencv-python dlib scikit-learn numpy

Make sure you have the necessary pre-trained models from Dlib:

shape_predictor_68_face_landmarks.dat

dlib_face_recognition_resnet_model_v1.dat

haarcascade_frontalface_default.xml (from OpenCV for face detection)

You can download them from:

Dlib models.

Haar Cascade.

Directory Structure

Ensure your project folder looks something like this:

/project
  |-- data_collection.py
  |-- training.py
  |-- recognition.py
  |-- shape_predictor_68_face_landmarks.dat
  |-- dlib_face_recognition_resnet_model_v1.dat
  |-- haarcascade_frontalface_default.xml
  |-- face_recognition_model.pkl  # generated after training
  |-- captured_images/            # created by data_collection.py

Step 1: Capture Images

Before training the model, you need to capture images for each person to be recognized.

python data_collection.py

Enter the name of the person when prompted. This will create a folder under captured_images/ with that name, where the images will be stored.

The script will start capturing images from your webcam and save them into the folder.

It uses the Haar Cascade for face detection, draws a rectangle around detected faces, and saves the face as an image.

Step 2: Train the Model

Once images are captured, use the training.py script to train the face recognition model.

python training.py

The script loads all images from the captured_images/ folder, extracts facial features using Dlib’s model, and trains an SVM classifier.

After training, the model is saved as face_recognition_model.pkl, and a label dictionary is generated for mapping person names to labels.

Step 3: Real-time Face Recognition

With the trained model, you can now recognize faces in real time using the webcam.

python recognition.py

The script loads the trained model and label dictionary.

The webcam captures frames in real-time and recognizes any faces detected. The recognized face name, along with a confidence score, is displayed on the screen.

You can press the q key to quit the program.

Code Details

1. Data Collection

File: data_collection.py

Purpose: Captures images of a person using the webcam.

Key Functions:

create_directory(name): Creates a folder to store images.

capture_images(name, num_images=1000): Captures face images and saves them in the created directory.

2. Training

File: training.py

Purpose: Trains a face recognition model using images captured in the previous step.

Key Functions:

load_images(directory): Loads images and their labels from the given directory.

extract_features(images, labels): Extracts face descriptors from the images using Dlib.

train_model(features, labels): Trains an SVM classifier on the extracted face descriptors.

3. Face Recognition

File: recognition.py

Purpose: Performs real-time face recognition using the trained model.

Key Functions:

load_model(): Loads the pre-trained model and label dictionary.

estimate_distance(face): Roughly estimates the distance of the face from the camera.

get_light_intensity(image): Calculates the light intensity of the image frame.

draw_face_mesh(image, shape): Draws a face mesh with 68 landmarks on the detected face.

Future Improvements

Improve distance estimation based on actual physical measurements.

Add more robust handling for different lighting conditions.

Incorporate more advanced classification techniques such as deep learning models (e.g., CNNs).

Enhance the user interface for better visualization of predictions and confidence scores.

Troubleshooting

Haar Cascade/Dlib Models Not Found: Ensure you’ve downloaded the required models and placed them in the correct directory.

No Faces Detected: Make sure your webcam is working correctly and the lighting is sufficient for face detection.

License

This project is licensed under the MIT License - see the LICENSE file for details.

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Posted Feb 7, 2025

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