CODEWITHSUNDEEP
pythonopencvqr-code
Abhimanyu Sharma
Abhimanyu Sharma

Reputation: 903

error while drawing rectangle on detected qr code

i created a simple program that detects qr code on image :

self.qrReader=cv2.QRCodeDetector()
self.text,points,_=self.qrReader.detectAndDecode(self.img)

now when im drawing rectangle on detected qr code :

cv2.rectangle(self.img,points[0][0],points[0][2],color,thickness)

im getting an error :

  File "e:\Users\Abhimanyu\Documents\aiocv\aiocv\qr_code_reader_module.py", line 19, in findQRCode
    cv2.rectangle(self.img,points[0][0],points[0][2],color,thickness)
cv2.error: OpenCV(4.5.2) :-1: error: (-5:Bad argument) in function 'rectangle'
> Overload resolution failed:
>  - Can't parse 'pt1'. Sequence item with index 0 has a wrong type
>  - Can't parse 'pt1'. Sequence item with index 0 has a wrong type
>  - Can't parse 'rec'. Expected sequence length 4, got 2
>  - Can't parse 'rec'. Expected sequence length 4, got 2

when im printing points[0][0] :

[ 40.       40.     ]

and when im printing points[0][2] :

[288.99997 288.99997]

the complete array looks like this :

[[[ 40.       40.     ]
  [288.99997  40.     ]
  [288.99997 288.99997]
  [ 40.      288.99997]]]

whats wrong here?

Upvotes: 0

Views: 339

Answers (1)

Red
Red

Reputation: 27547

Given in your post that print(points[0][0]) outputs [ 40. 40. ] and print(points[0][2]) outputs [288.99997 288.99997], simply replace:

cv2.rectangle(self.img, points[0][0], points[0][2], color, thickness)

with:

pt1 = int(points[0][0][0]), int(points[0][0][1])
pt2 = int(points[0][2][0]), int(points[0][2][1])
cv2.rectangle(self.img, pt1, pt2, color, thickness)

Upvotes: 1

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