Scan bar code using raspberry pi camera module v2

Question

How to scan barcode using Raspberry pi camera module V2

This is the link to my previously asked question about barcode scanning.

To be more specific:

Hardware : Raspberry pi and Raspberry pi camera module v2 :

https://www.amazon.in/Raspberry-Camera-Board-Module- V2/dp/B071P2S8LG/ref=sr_1_5?s=computers&ie=UTF8&qid=1525942832&sr=1-5&keywords=raspberry+pi+camera+module

I have tried to scan bar code using

1) pyzbar library 2) SimpleCV 3) OpenCV and zbar

Using Pyzbar :

from PIL import Image
import pyzbar.pyzbar as pyzbar

file_path = 'image.png'
with open(file_path, 'rb') as image_file:
image = Image.open(image_file)
image.load()

codes = pyzbar.decode(Image.open('image.png'))
print('QR codes: %s' % codes)

Using SimpleCV :

from SimpleCV import Color,Camera,Display

cam = Camera()  #starts the camera
display = Display() 

while(display.isNotDone()):

 img = cam.getImage() #gets image from the camera

 barcode = img.findBarcode() #finds barcode data from image
 if(barcode is not None): #if there is some data processed
   barcode = barcode[0] 
   result = str(barcode.data)
   print result #prints result of barcode in python shell
   barcode = [] #reset barcode data to empty set

 img.save(display) #shows the image on the screen

Using OpenCV :

https://www.pyimagesearch.com/2014/11/24/detecting-barcodes-images-python-opencv/

I have tried all three ways to scan barcode but none of them is working. Using the last code, I am able to detect the barcode location in the image but cannot scan barcode.

Thanks in advance

Answer 1

go through this. it should work.

from pyzbar.pyzbar import decode
from ftplib import FTP
import os
import numpy as np
import cv2
import time
from picamera.array import PiRGBArray
from picamera import PiCamera
fourcc = cv2.VideoWriter_fourcc(*'X264')

def dec(frame):
     x=decode(frame)
     for i in x:
        (x, y, w, h) = i.rect
        cv2.rectangle(frame,(x, y),(x + w, y + h),(0, 0, 255),2)
        barcodeData = i.data.decode("utf-8")
        barcodeType = i.type
        return(barcodeData,barcodeType,1)
     return('','',0)

camera=PiCamera()
camera.resolution=(1296,730)
camera.framerate=20
rawCapture=PiRGBArray(camera)
time.sleep(0.1)
cv2.namedWindow("Image",cv2.WINDOW_NORMAL)

for frame in camera.capture_continuous(rawCapture,format="bgr",use_video_port=True):
    image=frame.array
    x,y,p=dec(image)
    cv2.imshow("Image",image)
    print(x)
    print(y)

    if cv2.waitKey(2) & 0xFF == ord('q'):
                break
    rawCapture.truncate(0)


        #cap.release()
cv2.destroyAllWindows()