Docs: Add download instructions for dlib model

Author: debug-soham

CONTRIBUTING.md

@@ -25,6 +25,11 @@ Install dependencies
 
     pip install -r requirements.txt
 
+Download the facial landmark model  
+
+The dlib facial landmark model is required for blink detection. Download it from the link below, unzip it, and place the `shape_predictor_68_face_landmarks.dat` file inside the `/models` directory.
+* **Download Link**: [shape_predictor_68_face_landmarks.dat](https://dlib.net/files/shape_predictor_68_face_landmarks.dat.bz2)
+
 🔄 How to Contribute
 
     Check existing issues or ask to be assigned one on Discord.

README.md

@@ -48,7 +48,12 @@ source venv/bin/activate  # On Windows: venv\Scripts\activate
    ```bash
    pip install -r requirements.txt
    ```
-3. **Run the application:**
+3. **Download the model:**
+
+    The dlib facial landmark model is required for blink detection. Download it from the link below, unzip it, and place the `shape_predictor_68_face_landmarks.dat` file inside the `/models` directory.
+    * **Download Link**: [shape_predictor_68_face_landmarks.dat](https://dlib.net/files/shape_predictor_68_face_landmarks.dat.bz2)
+
+4. **Run the application:**
    ```bash
    python main.py
    ```

blinkDetect.py

@@ -20,7 +20,11 @@
 RESIZE_HEIGHT = 460
 
 thresh = 0.27
-modelPath = "models/shape_predictor_70_face_landmarks.dat"
+
+# IMPORTANT: You must download the shape_predictor_68_face_landmarks.dat file from
+# https://dlib.net/files/shape_predictor_68_face_landmarks.dat.bz2
+# and place it in the 'models' folder
+modelPath = "models/shape_predictor_68_face_landmarks.dat"
 sound_path = "alarm.wav"
 
 detector = dlib.get_frontal_face_detector()