Код: Выделить всё
import numpy as np
import cv2
img = cv2.imread('testD2.png')
lower = np.array([0, 0, 0], dtype = "uint8")
upper = np.array([100,100,100], dtype = "uint8")
mask = cv2.inRange(img, lower, upper)
img = cv2.bitwise_and(img, img, mask = mask)
gray = cv2.cvtColor(img,cv2.COLOR_BGR2GRAY)
edges = cv2.Canny(gray,50,150,apertureSize = 3)
minLineLength=img.shape[1]-300
lines = cv2.HoughLinesP(image=edges,rho=0.02,theta=np.pi/500, threshold=10,lines=np.array([]), minLineLength=minLineLength,maxLineGap=100)
if lines is not None:
a,b,c = lines.shape
for i in range(a):
cv2.line(img, (lines[i][0][0], lines[i][0][1]), (lines[i][0][2], lines[i][0][3]), (0, 0, 255), 3, cv2.LINE_AA)
cv2.imshow('edges', edges)
cv2.imshow('result', img)
cv2.waitKey(0)
cv2.destroyAllWindows()

Подробнее здесь: https://stackoverflow.com/questions/526 ... h-tranform