hand_gesture.py

import cv2
import mediapipe as mp

class HandGesture:
    def __init__(self):
        self.mpHands = mp.solutions.hands
        self.hands = self.mpHands.Hands()
        self.mpDraw = mp.solutions.drawing_utils
        self.length = 0

    def process(self, img):
        imgRGB = cv2.cvtColor(img, cv2.COLOR_BGR2RGB)
        results = self.hands.process(imgRGB)
        if results.multi_hand_landmarks:
            for handLms in results.multi_hand_landmarks:
                for id, lm in enumerate(handLms.landmark):
                    h, w, c = img.shape
                    cx, cy = int(lm.x * w), int(lm.y * h)
                    if id == 4:
                        x4, y4 = cx, cy
                    if id == 8:
                        x8, y8 = cx, cy
                        self.length = math.hypot(x8 - x4, y8 - y4)
                        # Add drawing code here...
                self.mpDraw.draw_landmarks(img, handLms, self.mpHands.HAND_CONNECTIONS)
        return img