Computer vision: calculte the vehicle  speed using open CV | Computer vision  arab





import cv2

import time

import os 

os.chdir(r"C:\Users\amb\Downloads")

cascade_src = r'C:\Users\amb\Downloads\cars1.xml'

video_src = r'C:\Users\amb\Downloads\video3.MP4'

#line a

ax1=70

ay=90

ax2=230


#line b

bx1=15

by=125

bx2=225


def Speed_Cal(time):

 

    try:        

        Speed = (9.144/1000)/(time/3600)                

        return Speed                 

    except ZeroDivisionError :        

        print ("can not devide by zero")                 

        

#car num

i = 1

start_time = time.time()

#video ....

cap = cv2.VideoCapture(video_src)

car_cascade = cv2.CascadeClassifier(cascade_src)   



while True:

    ret, img = cap.read()       

    if (type(img) == type(None)):       

        break               

    #bluring to have exacter detection        

    blurred = cv2.blur(img,ksize=(15,15))        

    gray = cv2.cvtColor(blurred, cv2.COLOR_BGR2GRAY)        

    cars = car_cascade.detectMultiScale(gray, 1.1, 2)        

    

    #line a #i know road has got        

    cv2.line(img,(ax1,ay),(ax2,ay),(255,0,0),2)        

    #line b         

    cv2.line(img,(bx1,by),(bx2,by),(255,0,0),2)        

    

    for (x,y,w,h) in cars:        

        cv2.rectangle(img,(x,y),(x+w,y+h),(0,0,255),2)               

        cv2.circle(img,(int((x+x+w)/2),int((y+y+h)/2)),5,(0,255,0),-1)               

        

        while int(ay) == int((y + y+h)/2):              

            cv2.line(img,(ax1,ay),(ax2,ay),(0,255,0),2)                     

            start_time = time.time()                     

            break                      

            

        while int(ay) <= int((y+y+h)/2):              

            if int(by) <= int((y+y+h)/2) & int( by + 10 ) >= int(( y + y+h)/2):                     

                cv2.line(img,(bx1,by),(bx2,by),(0,255,0),2)                              

                Speed = Speed_Cal(time.time() - start_time)                              

                print("Car Number "+str(i)+" Speed: "+str(Speed)+ " KM/H ")                               

                i = i + 1                                

                break                                

            else :                       

                cv2.putText(img, "Calcuting", (100,200), cv2.FONT_HERSHEY_SIMPLEX,                       

1,(0,255,0),3)                            

                break                                  

                

             

    cv2.imshow('video', img) 

    if cv2.waitKey(33) == 27:

        break

cap.release()#close cam

cv2.destroyAllWindows() #close window

============================

data used in this video

Click here to get the test video and xml file

#===================================#

if you faced any issue contact me via 

what's app : +201210894349

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