facerecog — Face Recognition Module

A lightweight face recognition module based on OpenCV LBPH (Local Binary Patterns Histograms).
Use it via the interactive CLI or embed it directly as a Python API in your own project.

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Features

• Register faces from camera or image files / folders
• Train the LBPH recognition model
• Detect & recognize faces real-time from camera or from image files
• Manage registered users (list, delete)
• Clean Python API — one class, zero boilerplate
• Customizable window titles via app_name

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Requirements

• Python 3.10+
• opencv-contrib-python >= 4.8.0
• numpy >= 1.24.0

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Installation

From PyPI (recommended)

pip install facerecog-lbph

From source

git clone https://github.com/AlulCode45/FaceRecon-Module.git
cd FaceRecon-Module
pip install -r requirements.txt

Important: Use opencv-contrib-python, not opencv-python.
The cv2.face.LBPHFaceRecognizer module is only available in the contrib build.

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Project Structure

When you use this module, it will automatically create the following in your working directory:

your-project/
├── facerecog/          ← this repo (if using from source)
│   ├── facerecog/      ← the Python package
│   ├── example.py      ← standalone CLI demo
│   ├── pyproject.toml
│   └── README.md
├── dataset/            ← auto created: face photos per person
├── trainer/            ← auto created: trained model output
└── labels.json         ← auto created: ID → name mapping

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Usage — Interactive CLI

Run the built-in CLI demo:

python example.py

Menu:

==============================================
         FACE RECOGNITION SYSTEM
==============================================
  [1]  Register  — Register face via camera
  [2]  Train     — Train the model
  [3]  Detect    — Real-time face detection
  [4]  List      — List registered users
  [5]  Delete    — Delete a user
  [6]  Detect    — Detect face from image
  [7]  Register  — Register face from image
  [0]  Exit
==============================================

Basic flow

[1] or [7] Register  →  [2] Train  →  [3] or [6] Detect

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Usage — Python API

from facerecog import FaceRecog

fr = FaceRecog()

Configuration (optional)

fr = FaceRecog(
    threshold=75,                # LBPH confidence: lower = stricter match (default 75)
    max_photos=40,               # photos captured per camera session (default 40)
    camera_index=0,              # camera device index (default 0)
    app_name="My App",           # label in OpenCV window titles (default "Face Recognition")
)

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Register Faces

Via camera:

saved = fr.register_from_camera("Alice")
print(f"{saved} photos saved")

Via single image file:

saved = fr.register_from_image("Alice", "/path/to/alice.jpg")

Via folder containing multiple images:

saved = fr.register_from_image("Alice", "/path/to/alice_photos/")

Supported formats: .jpg, .jpeg, .png, .bmp, .webp

Overwrite / append:

# Replace existing data
fr.register_from_image("Alice", "/photos/", overwrite=True)

# Add to existing data (default)
fr.register_from_image("Alice", "/photos/", append=True)

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Train the Model

info = fr.train()
print(info)
# {"total_images": 80, "total_persons": 2, "model_path": "trainer/trainer.yml"}

Must be re-run whenever faces are added or deleted.

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Detect Faces

Real-time from camera:

fr.detect_camera()
# Close with q, Esc, or click X on the window

From image file (with result window):

result = fr.detect_image("photo.jpg", show=True)

From image file (data only, no window):

result = fr.detect_image("photo.jpg", show=False)

print(f"Faces found: {result.total_faces}")

for face in result.faces:
    print(face.name)        # person name / "Unknown"
    print(face.recognized)  # True / False
    print(face.score)       # confidence percentage (0–100)
    print(face.confidence)  # raw LBPH value (lower = more confident)
    print(face.x, face.y, face.w, face.h)  # bounding box

Check if a face is recognized:

result = fr.detect_image("photo.jpg", show=False)

for face in result.faces:
    if face.recognized:
        print(f"Recognized: {face.name} ({face.score}%)")
    else:
        print("Unknown face")

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User Management

List all users:

users = fr.list_users()
for u in users:
    print(u["id"], u["name"], u["photos"])
# 1  Alice   40
# 2  Bob     35

Delete a user:

info = fr.delete_user("Alice")
print(info)
# {"id": 1, "name": "Alice", "photos_deleted": 40}

After deleting, call fr.train() again to update the model.

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Instance Info

print(fr)
# FaceRecog(app_name='Face Recognition', users=2, threshold=75, max_photos=40)

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Full Example

from facerecog import FaceRecog

fr = FaceRecog(threshold=70, app_name="Security System")

# 1. Register people from photo folders
fr.register_from_image("Alice", "./photos/alice/")
fr.register_from_image("Bob",   "./photos/bob/")

# 2. Train the model
info = fr.train()
print(f"Done: {info['total_images']} images, {info['total_persons']} people")

# 3. Detect faces in a group photo
result = fr.detect_image("group.jpg", show=True)
for face in result.faces:
    status = f"{face.name} ({face.score}%)" if face.recognized else "Unknown"
    print(f"Face at ({face.x},{face.y}): {status}")

# 4. Real-time detection
fr.detect_camera()

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Notes

• dataset/, trainer/, and labels.json are created in your current working directory — not inside the module folder.
• More training photos = better accuracy.
• If the camera is not detected, try camera_index=1 or camera_index=2.
• Use clear, well-lit, front-facing photos for best results.
• The app_name parameter sets the title of all OpenCV windows — useful when integrating into a larger app.

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License

MIT