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ATTENTION: Fast Line Detector which is available in OpenCV 4.x.x.

import cv2 img = cv2.imread("box.jpg", 0)

fld = cv2.ximgproc.createFastLineDetector() lines = fld.detect(img)

result_img = fld.drawSegments(img,lines)

cv2.imshow("Result", result_img) cv2.waitKey(0)

ATTENTION: Fast Line Detector which is available in OpenCV 4.x.x.

import cv2
img = cv2.imread("box.jpg", 0)
0)
  
fld = cv2.ximgproc.createFastLineDetector()
lines = fld.detect(img)fld.detect(img)
  
result_img = fld.drawSegments(img,lines)fld.drawSegments(img,lines)
  
cv2.imshow("Result", result_img)
cv2.waitKey(0)cv2.waitKey(0)