TypeError while template matching in opencv python

Question

Part of my code is :

import pyscreenshot as ImageGrab
img=ImageGrab.grab()
img = img.load()
img = np.array(img)
template = cv2.imread('s2_5.jpg',0)
res = cv2.matchTemplate(img,template,cv2.TM_CCOEFF)

I'm getting the following error message:

Traceback (most recent call last):  
  File "E:\python\opencv\template_matching.py", line 20, in <module>
  res = cv2.matchTemplate(img,template,cv2.TM_CCOEFF)
TypeError: image data type = 17 is not supported

Billal BEGUERADJ · Accepted Answer · 2016-06-07 09:09:28Z

1

You get that error because img and template are not of the same type, and more importantly, as the error messages says, img's type is not supported by cv2.matchTemplate().

On line 20 of your code, ImageGrab.grab() returns a PIL/Pillow image. So you need to convert img to a numpy array before using it as an input of cv2.matchTemplate().

answered Jun 7, 2016 at 9:09

Billal BEGUERADJ

23k45 gold badges125 silver badges142 bronze badges

Sign up to request clarification or add additional context in comments.

3 Comments

user4893562 Over a year ago

On line 4, I converted that image to numpy array. img = np.array(img)

Miki Over a year ago

@rajinikanth convert explicitly to uint8.

user4893562 Over a year ago

now i got this error:

Traceback (most recent call last):   File "E:\python\opencv\template_matching.py", line 14, in <module>     img = np.array(img,dtype=np.uint8) TypeError: long() argument must be a string or a number, not 'PixelAccess'

Collectives™ on Stack Overflow

TypeError while template matching in opencv python

1 Answer 1

3 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

3 Comments

Your Answer

Sign up or log in

Post as a guest

Related