hand_tracking.py

import cv2
import mediapipe as mp

class HandTracker:
    def __init__(self):
        self.mp_hands = mp.solutions.hands
        self.hands = self.mp_hands.Hands(
            max_num_hands=1,
            min_detection_confidence=0.7,
            min_tracking_confidence=0.7
        )
        self.mp_draw = mp.solutions.drawing_utils

    def detect_hand(self, frame):
        """Detects hand and extracts index finger position."""
        rgb_frame = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)
        results = self.hands.process(rgb_frame)

        if results.multi_hand_landmarks:
            for hand_landmarks in results.multi_hand_landmarks:
                index_finger = hand_landmarks.landmark[self.mp_hands.HandLandmark.INDEX_FINGER_TIP]
                h, w, _ = frame.shape
                return int(index_finger.x * w), int(index_finger.y * h)
        return None