Python line detection

Question

I am trying to detect lines using this python script:

import cv2
import numpy as np

img = cv2.imread('10crop.tiff')
gray = cv2.cvtColor(img,cv2.COLOR_BGR2GRAY)
edges = cv2.Canny(gray,50,150,apertureSize = 3)
minLineLength = 1
maxLineGap = 10
lines = cv2.HoughLinesP(edges,1,np.pi/180,100,minLineLength,maxLineGap)
for x1,y1,x2,y2 in lines[0]:
    cv2.line(img,(x1,y1),(x2,y2),(0,0,255),15)

cv2.imwrite('houghlines5.jpg',img)

I'm getting very poor results, am I doing something wrong? here is the image:

(the red line was marked by the script everything else was skipped and left black) I need to keep the text not marked.

Christoffer · Accepted Answer · 2018-06-04 13:08:53Z

1

You are almost there, you only need to print all lines. The code you provided only draws 1 line. So add this to your for loop:

for x in range(0, len(lines)):
    for x1,y1,x2,y2 in lines[x]:

answered Jun 4, 2018 at 13:08

Christoffer

5382 silver badges15 bronze badges

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

Collectives™ on Stack Overflow

Python line detection

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related