python围绕点旋转

#点p_x, p_y 围绕center_x, center_y顺时针旋转angle度

  

   

    

     

    
    

     

      import cv2
     
    
   

    

     

    
    

     

      import math
     
    
   

    

     

    
    

     

      import numpy as np
     
    
   

    

     

    
    

     

      import os
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      def get_degree(p1, p0):
     
    
   

    

     

    
    

     

          aaa = math.degrees(math.atan2((p1[1] - p0[1]), (p1[0] - p0[0])))
     
    
   

    

     

    
    

     
    if aaa < 0:
     
    
   

    

     

    
    

     

              aaa = 360 + aaa
     
    
   

    

     

    
    

     

          aaa = (aaa + 90)
     
    
   

    

     

    
    

     
    if aaa > 360:
     
    
   

    

     

    
    

     

              aaa = aaa - 360
     
    
   

    

     

    
    

     
    return aaa
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      def rotate_image(box_points, angle, scale=1.):
     
    
   

    

     

    
    

     

          c_x=box_points[0][0]
     
    
   

    

     

    
    

     

          c_y=box_points[0][1]
     
    
   

    

     

    
    

     

          rot_mat = cv2.getRotationMatrix2D((c_x, c_y), angle, scale)
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

          rot_move = np.dot(rot_mat, np.array([0, 0, 0]))
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

          rot_mat[0, 2] += rot_move[0]
     
    
   

    

     

    
    

     

          rot_mat[1, 2] += rot_move[1]
     
    
   

    

     

    
    

     

          new_box_points = []
     
    
   

    

     

    
    

     
    for point in box_points:
     
    
   

    

     

    
    

     

              new_points = []
     
    
   

    

     

    
    

     

              p_x, p_y = point[2],point[3]
     
    
   

    

     

    
    

     

              point1 = np.dot(rot_mat, np.array([p_x, p_y, 1]))
     
    
   

    

     

    
    

     

              new_points.append((point1))
     
    
   

    

     

    
    

     

              new_box_points.append(new_points)
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
    return ne
     
    
  
 

文章来源: blog.csdn.net，作者：AI视觉网奇，版权归原作者所有，如需转载，请联系作者。

原文链接：blog.csdn.net/jacke121/article/details/120028909