python 读图片性能测试

pil读图片需要0ms，但是转换opencv需要13ms

opencv读图片需要13ms

  

   

    

     

    
    

     

      import numpy as np
     
    
   

    

     

    
    

     

      import cv2
     
    
   

    

     

    
    

     

      import time
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      from PIL import Image
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      def a():
     
    
   

    

     

    
    

     

       path='d:/1.jpg'
     
    
   

    

     

    
    

     
 for i in range(10):
     
    
   

    

     

    
    

     

       start=time.time()
     
    
   

    

     

    
    

     

       roiImg=Image.open(path)
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

       img = cv2.cvtColor(np.asarray(roiImg), cv2.COLOR_RGB2BGR)
     
    
   

    

     

    
    

     

       read_time=time.time()-start
     
    
   

    

     

    
    

     

       start = time.time()
     
    
   

    

     

    
    

     

       imgByteArr = io.BytesIO()
     
    
   

    

     

    
    

     

       roiImg.save(imgByteArr, format='BMP')
     
    
   

    

     

    
    

     
 # roiImg.save(imgByteArr, format='Jpeg')
     
    
   

    

     

    
    

     
 # imgByteArr = imgByteArr.getvalue()
     
    
   

    

     

    
    

     

       print('pil time',read_time,time.time()-start)
     
    
   

    

     

    
    

     

       start = time.time()
     
    
   

    

     

    
    

     

       img=Image.open(imgByteArr)
     
    
   

    

     

    
    

     

       print('read io time',  time.time() - start)
     
    
   

    

     

    
    

     
 # img.show()
     
    
   

    

     

    
    

     
 # cv2.imshow('',img_decode)
     
    
   

    

     

    
    

     
 # cv2.waitKey(1)
     
    
  
 

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/88264113