CODEWITHSUNDEEP
pythonpython-2.7opencv
Mourad Over Flow
Mourad Over Flow

Reputation: 191

Detecting rectangles using OpenCV 2.4.9

WHAT I WANT TO DO :

I want to detect rectangles in an image..

WHAT I HAVE DONE SO FAR:

    import cv2
    import numpy as np

    img_path = cv2.imread('/XXX/XXX.TIF',0)
    ret,thresh = cv2.threshold(img_path,127,255,0)
    contours,hierarchy = cv2.findContours(thresh, 1, 2)
    cnt = contours[0]
    x,y,w,h = cv2.boundingRect(cnt)
    cv2.rectangle(img_path,(x,y),(x+w,y+h),(0,255,0),2)

    rect = cv2.minAreaRect(cnt)
    box = cv2.boxPoints(rect)
    box = np.int0(box)
    im = cv2.drawContours(im,[box],0,(0,0,255),2)

THE ERROR I AM GETTING :

AttributeError: 'module' object has no attribute 'boxPoints'

Concerning this line of code:

    box = cv2.boxPoints(rect)

WHAT I THINK : I beleive that it is caused by the version of OpenCV I am using (2.4.9).

Knowing that it is not possible for me now to pass to OpenCV 3.0, how can I make it work using openCV 2.9 and Python 2.7 ?

EDIT & SOLUTION :

So as answered by Surabhi Valma, this could be a solution :

Just add cv2.cv.BoxPoints(rect) instead of cv2.boxPoints(rect)

Upvotes: 0

Views: 4081

Answers (3)

Surabhi Verma
Surabhi Verma

Reputation: 108

Just add cv2.cv.BoxPoints(rect) instead of cv2.boxPoints(rect)

Upvotes: 2

alkasm
alkasm

Reputation: 23012

The most recent OpenCV 2 release is 2.4.13.2; there is no 2.9. Anyways, this method was never included in the cv2 library with Python wrappers. Your choices are to upgrade to OpenCV 3+ or fall back on the (deprecated) cv module (which is included with older versions of Python OpenCV wrappers) to access the C method directly:

rect = cv2.minAreaRect(cnt)
box = np.int0(cv2.cv.BoxPoints(rect))
cv2.drawContours(im,[box],0,(0,0,255),2)

Upvotes: 1

Hara
Hara

Reputation: 1502

When I go thru releases could not find 2.9. May be your version is 2.4.9. If you try with 3.x, it may work.

There was an opencv-issue / feature already tracked to closure This function is for sure available in 3.0.0-dev or above, Please try to upgrade and check.

Upvotes: 1

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