cv/geometry/line2.py

import cv2
import numpy as np

# define a video capture object
vid = cv2.VideoCapture(0)

while(True):

    # Capture the video frame
    # by frame
    ret, frame = vid.read()

    # Convert to grayscale.
    gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)

    #Create default parametrization LSD
    lsd = cv2.createLineSegmentDetector(1000)

    lines = lsd.detect(gray)[0] #Position 0 of the returned tuple are the detected lines

    # The below for loop runs till r and theta values
    # are in the range of the 2d array

    if lines is not None:
        for line in lines:
            print (line)

    # Draw detected lines in the image
    frame = lsd.drawSegments(frame,lines)

    # Display the resulting frame
    cv2.imshow('frame', frame)

    # the 'q' button is set as the
    # quitting button you may use any
    # desired button of your choice
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break

# After the loop release the cap object
vid.release()
# Destroy all the windows
cv2.destroyAllWindows()