Opencv專案實戰：14 手勢控制音量

import cv2

import time

import HandTrackingModule as htm

import math

import numpy as np

from ctypes import cast, POINTER

from comtypes import CLSCTX_ALL

from pycaw.pycaw import AudioUtilities, IAudioEndpointVolume

wCam, hCam = 640, 480

cap = cv2.VideoCapture(0)

cap.set(3, wCam)

cap.set(4, hCam)

pTime = 0

detector = htm.handDetector(detectionCon=0.7)

devices = AudioUtilities.GetSpeakers()

interface = devices.Activate(

    IAudioEndpointVolume._iid_, CLSCTX_ALL, None)

volume = cast(interface, POINTER(IAudioEndpointVolume))

volume.GetMute()

volume.GetMasterVolumeLevel()

volRange = volume.GetVolumeRange()

##print的結果(-74.0, 0.0, 1.0)

minvol,maxvol = volRange[0],volRange[1]

vol=0

volBar=400

volPer=0

while True:

    success, img = cap.read()

    detector.findHands(img)

    lmList=detector.findPosition(img,draw=False)

    if len(lmList)!=0:

        # print(lmList[4])

        x1,y1=lmList[4][1],lmList[4][2]

        x2,y2=lmList[8][1],lmList[8][2]

        cx,cy=(x1+x2)//2,(y1+y2)//2

        cv2.circle(img,(x1,y1),15,(125, 125, 255),cv2.FILLED)

        cv2.circle(img, (x2, y2), 15, (125, 125, 255), cv2.FILLED)

        cv2.line(img,(x1,y1),(x2,y2),(125, 125, 255),3)

        cv2.circle(img, (cx, cy), 15, (125, 125, 255), cv2.FILLED)

        length=math.hypot(x2-x1,y2-y1)

        if length<50:

            cv2.circle(img, (cx, cy), 15, (0, 255, 0), cv2.FILLED)

        # print(length)

         #handrange  50——300

        #volume range -74——0

         vol = np.interp(length, [50, 300], [minvol, maxvol])

        volBar = np.interp(length, [50, 300], [400, 150])

        volPer = 外匯跟單gendan5.comnp.interp(length, [50, 300], [0, 100])

        print(int(length), vol)

        volume.SetMasterVolumeLevel(vol, None)

     cv2.rectangle(img, (50, 150), (85, 400), (125, 125, 255), 3)

    cv2.rectangle(img, (50, int(volBar)), (85, 400), (125, 125, 255), cv2.FILLED)

    cv2.putText(img, f'{int(volPer)}%', (40, 450), cv2.FONT_HERSHEY_COMPLEX,

                1, (125, 125, 255), 3)

 #################列印幀率#####################

    cTime = time.time()

    fps = 1 / (cTime - pTime)

    pTime = cTime

    cv2.putText(img, f'FPS: {int(fps)}', (40, 50), cv2.FONT_HERSHEY_COMPLEX,

                1, (255, 100, 100), 3)

     cv2.imshow("Img", img)

    k=cv2.waitKey(1)

    if k==27:break