sharedctypes numpy

  

   

    

     

    
    

     

      import ctypes
     
    
   

    

     

    
    

     

      from multiprocessing import sharedctypes
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      import numpy as np
     
    
   

    

     

    
    

     

      import cv2, multiprocessing
     
    
   

    

     

    
    

     

      import time
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      def show_image(images):
     
    
   

    

     

    
    

     

       i=0
     
    
   

    

     

    
    

     
 while 1:
     
    
   

    

     

    
    

     
 if len(images)>i:
     
    
   

    

     

    
    

     

       print(i)
     
    
   

    

     

    
    

     

       cv2.imshow("a",images[i])
     
    
   

    

     

    
    

     

       cv2.waitKey(1)
     
    
   

    

     

    
    

     

       i+=1
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      def make_array(shape=(1,), dtype=np.uint8, shared=False, fill_val=None):
     
    
   

    

     

    
    

     

       start = time.time()
     
    
   

    

     

    
    

     

       np_type_to_ctype = {np.float32: ctypes.c_float,
     
    
   

    

     

    
    

     

       np.float64: ctypes.c_double,
     
    
   

    

     

    
    

     

       np.bool: ctypes.c_bool,
     
    
   

    

     

    
    

     

       np.dtype('uint8'): ctypes.c_ubyte,
     
    
   

    

     

    
    

     

       np.uint8: ctypes.c_ubyte,
     
    
   

    

     

    
    

     

       np.uint64: ctypes.c_ulonglong}
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
 if not shared:
     
    
   

    

     

    
    

     

       np_arr = np.empty(shape, dtype=dtype)
     
    
   

    

     

    
    

     
 else:
     
    
   

    

     

    
    

     

       numel =int(np.prod(shape))
     
    
   

    

     

    
    

     

       arr_ctypes = sharedctypes.RawArray(np_
     
    
  
 

文章来源: blog.csdn.net，作者：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/88929975