How to Controll Screen Brightness Using yourHand detection in Python Using OpenCv

 Control your screen brightness by just using your two fingers is really cool. You may see this kind of technology in scientific movies now you can make it using OpenCV with the help of python. 

Modules:

OpenCV: for recognizing images

math: for detecting the distance of your fingers

screen_brightness_control: for controlling the brightness of your system

mediapipe: for detecting hands 

numpy: for play with arrays

Code:

import cv2

import mediapipe as mp

from math import hypot

import screen_brightness_control as sbc

import numpy as np

 

cap = cv2.VideoCapture(0)

 

mpHands = mp.solutions.hands

hands = mpHands.Hands()

mpDraw = mp.solutions.drawing_utils

 

while True:

    success,img = cap.read()

    imgRGB = cv2.cvtColor(img,cv2.COLOR_BGR2RGB)

    results = hands.process(imgRGB)

 

    lmList = []

    if results.multi_hand_landmarks:

        for handlandmark in results.multi_hand_landmarks:

            for id,lm in enumerate(handlandmark.landmark):

                h,w,_ = img.shape

                cx,cy = int(lm.x*w),int(lm.y*h)

                lmList.append([id,cx,cy])

            mpDraw.draw_landmarks(img,handlandmark,mpHands.HAND_CONNECTIONS)

   

    if lmList != []:

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

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

 

        cv2.circle(img,(x1,y1),4,(255,0,0),cv2.FILLED)

        cv2.circle(img,(x2,y2),4,(255,0,0),cv2.FILLED)

        cv2.line(img,(x1,y1),(x2,y2),(255,0,0),3)

 

        length = hypot(x2-x1,y2-y1)

 

        bright = np.interp(length,[15,220],[0,100])

        print(bright,length)

        sbc.set_brightness(int(bright))

       

        # Hand range 15 - 220

        # Brightness range 0 - 100

 

    cv2.imshow('Image',img)

    if cv2.waitKey(1) & 0xff==ord('q'):

        break

Github:

You can also find the code here

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