openCV想求图片中毛发角度，出现了断电，请问怎么解决呢

Question

用VS2019做的项目，想求图片中毛发的方向，然后出现了断点，代码就这么多，怎么解决呢？

Answer 1

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• 帮你找了个相似的问题, 你可以看下: https://ask.csdn.net/questions/7649377
• 这篇博客也不错, 你可以看下OpenCV零基础从配置环境到读取图片，输出各种灰度腐蚀图，最后输出直方图，做矩阵运算等等
• 您还可以看一下 AI100讲师老师的计算机视觉实战：如何使用OpenCV构建视觉应用课程中的 计算机视觉实战：如何使用OpenCV快速构建视觉应用小节, 巩固相关知识点
  
• 除此之外, 这篇博客: 深度学习和目标检测系列教程 20-300：OpenCV与图像处理：霍夫变换技术实现直线检测中的 检测视频中的车道 部分也许能够解决你的问题, 你可以仔细阅读以下内容或跳转源博客中阅读:
  

  #coding=gbk
  '''
  @Author：Runsen
  '''
  import cv2
  import numpy as np
  
  def make_coordinates(image, line_parameters):
      slope, intercept = line_parameters
      y1 = image.shape[0]
      y2 = int(y1*(3/5))
      x1 = int((y1 - intercept)/slope)
      x2 = int((y2 - intercept)/slope)
      return np.array([x1, y1, x2, y2])
  
  def average_slope_intercept(image, lines):
      left_fit = []
      right_fit = []
      for line in lines:
          x1, y1, x2, y2 = line.reshape(4)
          parameters = np.polyfit((x1, x2), (y1, y2), 1)
          slope = parameters[0]
          intercept = parameters[1]
          if slope < 0:
              left_fit.append((slope, intercept))
          else:
              right_fit.append((slope, intercept))
      left_fit_average = np.average(left_fit, axis=0)
      right_fit_average = np.average(right_fit, axis=0)
      left_line = make_coordinates(image, left_fit_average)
      right_line = make_coordinates(image, right_fit_average)
      return np.array([left_line, right_line])
  
  def canny(image):
      gray = cv2.cvtColor(image, cv2.COLOR_RGB2GRAY)
      blur = cv2.GaussianBlur(gray,(5, 5), 0)
      canny = cv2.Canny(blur, 50, 150)
      return canny
  
  def display_lines(image, lines):
      line_image = np.zeros_like(image)
      if lines is not None:
          for x1, y1, x2, y2 in lines:
              cv2.line(line_image, (x1, y1), (x2, y2), (255, 255, 255), 10)
      return line_image
  
  def region_of_interest(image):
      height = image.shape[0]
      polygons = np.array([
      [(200, height), (1100, height), (550, 250)]
      ])
      mask = np.zeros_like(image)
      cv2.fillPoly(mask, polygons, 255)
      masked_image = cv2.bitwise_and(image, mask)
      return masked_image
  
  
  cap = cv2.VideoCapture('test2.mp4')
  while(cap.isOpened()):
      _, frame = cap.read()
      canny_image = canny(frame)
      cropped_image = region_of_interest(canny_image)
      lines = cv2.HoughLinesP(cropped_image, 2, np.pi/180, 100, np.array([]), minLineLength=40, maxLineGap=5)
      averaged_lines = average_slope_intercept(frame, lines)
      line_image = display_lines(frame, averaged_lines)
      combo_image = cv2.addWeighted(frame, 0.8, line_image, 1, 1)
      cv2.imshow('result',combo_image)
      if cv2.waitKey(1) == ord('q'):
          break
  cap.release()
  cv2.destroyAllWindows()
  
  

  

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