AI Mood-Based Wallpaper Switcher (Windows)

import cv2

import mediapipe as mp

import numpy as np

import ctypes

import os

import time

# ---------------------------------------

# CONFIGURATION

# ---------------------------------------

WALLPAPER_DIR = "wallpapers"

DETECTION_INTERVAL = 5   # seconds between wallpaper changes

MOOD_WALLPAPERS = {

    "happy": "happy.jpg",

    "sad": "sad.jpg",

    "angry": "angry.jpg",

    "neutral": "neutral.jpg"

}

# ---------------------------------------

# Windows Wallpaper Setter

# ---------------------------------------

def set_wallpaper(image_path):

    ctypes.windll.user32.SystemParametersInfoW(

        20, 0, image_path, 3

    )

# ---------------------------------------

# Face & Landmark Setup

# ---------------------------------------

mp_face_mesh = mp.solutions.face_mesh

face_mesh = mp_face_mesh.FaceMesh(refine_landmarks=True)

mp_draw = mp.solutions.drawing_utils

# ---------------------------------------

# Simple Emotion Detection (Rule-Based)

# ---------------------------------------

def detect_emotion(landmarks):

    # Mouth & eyebrow points

    mouth_left = landmarks[61]

    mouth_right = landmarks[291]

    mouth_top = landmarks[13]

    mouth_bottom = landmarks[14]

    left_eyebrow = landmarks[70]

    right_eyebrow = landmarks[300]

    mouth_width = abs(mouth_right.x - mouth_left.x)

    mouth_height = abs(mouth_bottom.y - mouth_top.y)

    eyebrow_height = abs(left_eyebrow.y - right_eyebrow.y)

    # Heuristic rules

    if mouth_height > 0.035 and mouth_width > 0.04:

        return "happy"

    elif mouth_height < 0.015:

        return "sad"

    elif eyebrow_height < 0.01:

        return "angry"

    else:

        return "neutral"

# ---------------------------------------

# MAIN LOOP

# ---------------------------------------

def main():

    cap = cv2.VideoCapture(0)

    last_change = time.time()

    current_mood = None

    print("🎭 Mood-Based Wallpaper Switcher Started")

    print("Press 'Q' to quit.\n")

    while True:

        ret, frame = cap.read()

        if not ret:

            break

        rgb = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)

        results = face_mesh.process(rgb)

        if results.multi_face_landmarks:

            landmarks = results.multi_face_landmarks[0].landmark

            mood = detect_emotion(landmarks)

            cv2.putText(

                frame,

                f"Mood: {mood}",

                (30, 50),

                cv2.FONT_HERSHEY_SIMPLEX,

                1,

                (0, 255, 0),

                2

            )

            # Change wallpaper only after interval

            if mood != current_mood and time.time() - last_change > DETECTION_INTERVAL:

                wallpaper_path = os.path.join(WALLPAPER_DIR, MOOD_WALLPAPERS[mood])

                if os.path.exists(wallpaper_path):

                    set_wallpaper(os.path.abspath(wallpaper_path))

                    print(f"🖼️ Wallpaper changed → {mood}")

                    current_mood = mood

                    last_change = time.time()

        cv2.imshow("AI Mood Detector", frame)

        if cv2.waitKey(1) & 0xFF == ord("q"):

            break

    cap.release()

    cv2.destroyAllWindows()

# ---------------------------------------

# RUN

# ---------------------------------------

if __name__ == "__main__":

    main()