measure_energy_iot/image_compression.py

   1 from PIL import Image
   2 import time
   3 import cv2
   4 import subprocess
   5
   6 import sys
   7
   8 quality=int(sys.argv[1])
   9 print("quality ",quality)
  10
  11 im=Image.open("lena.jpg")
  12 elapsed_time=0
  13
  14 for i in range(100):
  15     t = time.process_time()
  16     im.save("lena2.jpg",quality=quality)
  17     elapsed_time += time.process_time() - t
  18
  19 print("time pil",elapsed_time)
  20
  21
  22
  23
  24
  25 elapsed_time=0
  26 for i in range(100):
  27     t = time.process_time()
  28     im2=im.resize((256, 256))
  29     im2.save("lena3.jpg",quality=quality)
  30     elapsed_time += time.process_time() - t
  31
  32 print("time resize + pil",elapsed_time)
  33
  34
  35
  36
  37 img = cv2.imread('lena.jpg')
  38 elapsed_time=0
  39
  40
  41 for i in range(100):
  42     t = time.process_time()
  43     cv2.imwrite("lena4.jpg", img,[int(cv2.IMWRITE_JPEG_QUALITY), quality])
  44     elapsed_time += time.process_time() - t
  45
  46 print("time cv2",elapsed_time)
  47
  48
  49 elapsed_time=0
  50 for i in range(100):
  51     t = time.process_time()
  52     resized = cv2.resize(img, (256,256), interpolation=cv2.INTER_LINEAR)
  53     cv2.imwrite("lena5.jpg", resized,[int(cv2.IMWRITE_JPEG_QUALITY), quality])
  54     elapsed_time += time.process_time() - t
  55
  56 print("time resize + cv2",elapsed_time)
  57
  58 elapsed_time=0
  59 for i in range(10):
  60     t = time.process_time()
  61     proc=subprocess.Popen("scp lena4.jpg bilbo:/tmp", shell=True)
  62     proc.wait()
  63     elapsed_time += time.process_time() - t
  64
  65 print("ssh normal",elapsed_time)
  66
  67
  68 elapsed_time=0
  69 for i in range(10):
  70     t = time.process_time()
  71     proc=subprocess.Popen("scp lena5.jpg bilbo:/tmp", shell=True)
  72     proc.wait()
  73     elapsed_time += time.process_time() - t
  74
  75 print("ssh reduce",elapsed_time)