Problem Statement
Solution Description
For thiscustom AI development project, we utilised technologies and libraries like OpenCV, LBPH algorithm, SQLite database, and even PIL or Python Imaging library. We brought these technologies and tools together to build a system that can recognize people accurately. The system uses the following workflow.
Detailed Workflow
Now that we have understood the concept of the system on a more superficial basis let’s also shed some light on the exact steps our system utilizes to ensure accurate face recognition.
- Dataset Creation
Step 1: Enter Details
- The user (typically an administrator) enters the details of the employee, such as name, ID, and department.
Step 2: Capture Image
- The system captures images of the employee using the webcam.
- Multiple images may be captured to account for different facial expressions and angles.
Step 3: Store Image in Dataset Folder
- The captured images are stored in a designated folder, with each image labeled according to the employee’s ID.
Step 4: Insert Details in DB
- The employee’s details and image paths are inserted into the SQLite database for future reference.
2. Model Training
Step 1: Load Dataset
- The system loads the images and corresponding IDs from the dataset folder.
Step 2: Train LBPH Recognizer
- The LBPH recognizer is trained using the loaded dataset.
- The training process involves converting the images into grayscale, extracting features, and creating a feature vector for each image.
Step 3: Save Trained Model
- The trained model is saved for later use in the recognition phase.
- Saving the model ensures that the training process does not need to be repeated every time the system starts.
3. Real-Time Recognition
Step 1: Open Camera
- The system activates the webcam and begins capturing video frames.
Step 2: Face Recognition Loop
- A continuous loop processes each frame captured by the webcam.
Step 3: Capture Frame from Camera
- Each frame is captured and processed individually.
Step 4: Detect Faces
- The Haar Cascade classifier detects faces in the current frame.
- If no face is detected, the system continues to the next frame.
Step 5: Retrieve Details
- If a face is detected, the system uses the LBPH recognizer to identify the face.
- The system retrieves the associated profile details from the SQLite database.
Step 6: Display Results
- The recognized face and profile information are displayed on the screen.
- If the face is not recognized, the system may prompt to add the new face to the database or simply notify that the individual is not an employee.
Using the following steps, our LBPH and OpenCV-based face recognition system protects organizations from unauthorized access from people with bad intent.
