handTrackerModule.py

import cv2
import mediapipe as mp
from time import time


class handDetector():
    def __init__(self, mode=False, maxHands=2, modelComplexity=1, detectionConfidence=0.5, trackConfidence=0.5):
        self.mode = mode
        self.maxHands = maxHands
        self.modelComplexity = modelComplexity
        self.detectionConfidence = detectionConfidence
        self.trackConfidence = trackConfidence

        self.mpHands = mp.solutions.hands
        self.hands = self.mpHands.Hands(self.mode, self.maxHands, self.modelComplexity, self.detectionConfidence, self.trackConfidence)
        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 = list()

        if self.results.multi_hand_landmarks:
            myHand = self.results.multi_hand_landmarks[handNo]
            for id, lm in enumerate(myHand.landmark):
                # print(id, lm)
                h, w, c = img.shape
                cx, cy = int(lm.x*w), int(lm.y*h)
                # print(f"{id}: ({cx}, {cy})")
                self.lmList.append([id, cx, cy])

                if draw and id == 8:
                    cv2.circle(img, (cx, cy), 15, (51, 190, 232), cv2.FILLED)
        
        return self.lmList

    def fingersUp(self, img):
        # Counting fingers that are up
        fingersUp = []
        # Thumb
        if self.lmList[self.tipIds[0]][1] > self.lmList[self.tipIds[0] - 1][1]:
            fingersUp.append(1)
        else:
            fingersUp.append(0)
        
        # 4 fingers
        for id in range(1, 5):
            if self.lmList[self.tipIds[id]][2] < self.lmList[self.tipIds[id] - 2][2]:
                fingersUp.append(1)
            else:
                fingersUp.append(0)
        
        return fingersUp


def main():
    pTime = 0
    cTime = 0

    cap = cv2.VideoCapture(0)
    detector = handDetector()

    while True:
        success, img = cap.read()
        img = detector.findHands(img)
        lmList = detector.findPosition(img)
        if len(lmList) != 0:
            print(lmList[8])

        cTime = time()
        fps = 1/(cTime - pTime)
        pTime = cTime

        cv2.putText(img, str(int(fps)), (10, 70), cv2.FONT_HERSHEY_PLAIN, 3, (51, 190, 232), 3)

        cv2.imshow("Image", img)
        cv2.waitKey(1)



if __name__ == "__main__":
    main()