face_mask_detection

Mask Detection Model

Model Overview

Name: Mask Detection CNN
Author: Your Name
Date: 2025-09-26
Framework: Keras (TensorFlow backend)
Format: HDF5 (.h5)
License: MIT / CC0 (choose as needed)

This model is designed to detect whether a person is wearing a mask or not from images of faces. It can be used in real-time applications such as webcam-based mask detection or image classification.

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Intended Use

• Primary Use: Classify face images as "Mask" or "No Mask".
• Applications: Public safety, automated mask compliance monitoring, educational demos.
• Limitations:
  • The model works on cropped face images; it may produce inaccurate results if the input contains multiple faces without detection.
  • Lighting, occlusions, or extreme angles may affect accuracy.
  • Model trained on limited dataset; performance may vary on unseen ethnicities or environments.

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Model Details

• Input: RGB image of shape (128, 128, 3)
• Preprocessing:
  • Resize to 128x128 pixels
  • Normalize pixel values to range [0, 1]
• Output:
  • 0: Mask
  • 1: No Mask
  • Output is a softmax probability distribution; prediction = argmax(output)
• Architecture: Convolutional Neural Network (CNN) with 2-3 Conv2D + MaxPooling layers, Flatten, Dense layers

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Training

• Dataset: Custom mask/no-mask face dataset
• Loss Function: Categorical Crossentropy
• Optimizer: Adam
• Metrics: Accuracy
• Epochs: Variable depending on training
• Batch Size: Variable depending on training

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Evaluation

• Accuracy: High on training/validation dataset (exact value depends on training)
• Test Notes: Recommended to evaluate on new faces under similar conditions to training images

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Usage Example

import cv2
import numpy as np
from keras.models import load_model

# Load model
model = load_model("mask_detection_model.h5")

# Load image
image = cv2.imread("face.jpg")
image_resized = cv2.resize(image, (128, 128))
image_scaled = image_resized.astype("float32") / 255.0
image_input = np.expand_dims(image_scaled, axis=0)

# Predict
prediction = model.predict(image_input)
pred_label = np.argmax(prediction, axis=1)[0]

if pred_label == 0:
    print("Mask 😷✅")
else:
    print("No Mask ❌")