HandTrackingModule.py

import cv2
import mediapipe as mp
import time 


class HandDetector():
    def __init__(self, mode=False, maxHands=2, modelComplexity = 1,detectionCon=0.5, trackCon=0.5):
        self.mode = mode
        self.maxHands = maxHands
        self.modelComplexity = modelComplexity
        self.detectionCon = detectionCon
        self.trackCon = trackCon
 
        self.mpHands = mp.solutions.hands
        self.hands = self.mpHands.Hands(self.mode, self.maxHands,self.modelComplexity,
                                        self.detectionCon, self.trackCon)
        self.mpDraw = mp.solutions.drawing_utils

        self.tipIds = [4,8,12,16,20]

    def findHands(self,img,draw = True):
        imgRGB = cv2.cvtColor(img, cv2.COLOR_BGR2RGB)
        self.results = self.hands.process(imgRGB)

        if self.results.multi_hand_landmarks:
            for handLms in self.results.multi_hand_landmarks:
                if draw:
                    self.mpDraw.draw_landmarks(img, handLms,self.mpHands.HAND_CONNECTIONS)
        
        return img

    def findPosition(self, img,handNo=0,draw = True):
        self.lmList = []
        if self.results.multi_hand_landmarks:
            myHand = self.results.multi_hand_landmarks[handNo]

            for id,lm in enumerate(myHand.landmark):
                h,w,c = img.shape
                cx,cy = int(lm.x*w),int(lm.y*h)
                self.lmList.append([id,cx,cy])
                if draw:
                    cv2.circle(img,(cx,cy),15,(255,0,255),cv2.FILLED)
        return self.lmList

    def fingersUp(self):
        fingers = []
        # Thumb
        if self.lmList[self.tipIds[0]][1] < self.lmList[self.tipIds[0] - 1][1]:
            fingers.append(1)
        else:
            fingers.append(0)

        # Fingers
        for id in range(1, 5):
            if self.lmList[self.tipIds[id]][2] < self.lmList[self.tipIds[id] - 2][2]:
                fingers.append(1)
            else:
                fingers.append(0)

        # totalFingers = fingers.count(1)

        return fingers