使用霍夫线变换进行线检测

Question

我想在表格单元格上拆分此图像，因为我想先检测行，但是此代码仅检测一行，请在此问题上帮助我。我的代码在这里

   import cv2
   import numpy as np

   img = cv2.imread('32.jpeg')
   gray = cv2.cvtColor(img,cv2.COLOR_BGR2GRAY)
   edges = cv2.Canny(gray,50,150,apertureSize = 3)
   lines = cv2.HoughLines(edges,1,np.pi/180,200)
   for rho,theta in lines\[0\]:
       a = np.cos(theta)
       b = np.sin(theta)
       x0 = a*rho
       y0 = b*rho
       x1 = int(x0 + 1000*(-b))
       y1 = int(y0 + 1000*(a))
       x2 = int(x0 - 1000*(-b))
       y2 = int(y0 - 1000*(a))
       cv2.line(img,(x1,y1),(x2,y2),(0,0,255),2)

    cv2.imwrite('houghlines3.jpg',img)][1]][1]