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)
  
 

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原文链接：blog.csdn.net/jacke121/article/details/88264113