Hi all,
I am learning techniques on how to detect horizontal lines. So far I know how to detect a continuous horizontal line. So I am trying to learn how to detect a broken (dotted) horizontal line.
The code that I use to detect continuous horizontal line is below.
A test image I am using is below:
[url=https://pasteboard.co/J3YpAY6.jpg[/url]
I have tried HoughLinesP from OpenCV but I can't seem to get the parameters right.
Any direction/advice will be greatly appreciated.
I am learning techniques on how to detect horizontal lines. So far I know how to detect a continuous horizontal line. So I am trying to learn how to detect a broken (dotted) horizontal line.
The code that I use to detect continuous horizontal line is below.
import cv2 import functions import numpy as np # Load image, convert to grayscale, Otsu's threshold image = cv2.imread('new.jpg') no_horizontal = image.copy() gray = cv2.cvtColor(image,cv2.COLOR_BGR2GRAY) thresh = cv2.threshold(gray, 0, 255, cv2.THRESH_BINARY_INV + cv2.THRESH_OTSU)[1] # Detect horizontal lines horizontal_kernel = cv2.getStructuringElement(cv2.MORPH_RECT, (40,1)) detect_horizontal = cv2.morphologyEx(thresh, cv2.MORPH_OPEN, horizontal_kernel, iterations=2) cnts = cv2.findContours(detect_horizontal, cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE) cnts = cnts[0] if len(cnts) == 2 else cnts[1] for c in cnts: cv2.drawContours(no_horizontal, [c], -1, (255,255,255), 3)
A test image I am using is below:
[url=https://pasteboard.co/J3YpAY6.jpg[/url]
I have tried HoughLinesP from OpenCV but I can't seem to get the parameters right.
Any direction/advice will be greatly appreciated.