how to count the number of the horizontal lines using open cv python?

Question

I have an images and convert it into gray scale, find the gaussianblur and threshold, I detect the horizontal lines. Now I want to count the numbers of horizontal lines present in the table (images). Please tell me how to count?`

my code:

import cv2
import numpy as np

# Load image, grayscale, Gaussian blur, Otsu's threshold
image = cv2.imread('1.jpg')
gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)
blur = cv2.GaussianBlur(gray, (3,3), 0)
thresh = cv2.threshold(blur, 0, 255, cv2.THRESH_BINARY_INV + cv2.THRESH_OTSU)[1]

# Detect horizontal lines
horizontal_kernel = cv2.getStructuringElement(cv2.MORPH_RECT, (50,1))
horizontal_mask = cv2.morphologyEx(thresh, cv2.MORPH_OPEN, horizontal_kernel, iterations=1)

cv2.imshow('image',horizontal_mask)

image1:

Answer 1

You can try something the the Hough Line Transform to detect lines.