Compress JPEG image in Python using PIL

In this tutorial, we are going to discuss on how to compress the JPEG image in  Python.

Compressing JPEG image in Python:

We know that compression is important to decrease  the memory size for storing the image

Here is the code in Python for compressing the JPEG image

import os
import sys
from PIL import Image

def compressimg(f,ver=False):
  fpath= os.path.join(os.getcwd(),f)
  oldsize = os.stat(fpath).st_size
  pic= Image.open(fpath)
  dim= pict.size
  pic.save("Compressed_"+file,"JPEG",optimize=True,quality=85) 
  newsize= os.stat(os.path.join(os.getcwd(),"Compressed_"+f)).st_size
  perc= (oldsize-newsize)/float(oldsize)*100
  if (ver):
    print("File compressed from {0} to {1} or {2}%".format(oldsize,newsize,percent))
  return perc

def main():
  ver=False
  #checks for verbose flag
  if (len(sys.argv)>1):
    if (sys.argv[1].lower()=="-v"):
      ver=True
  PWD=os.getcwd()# present working directory

  t=0
  n=1
  for f in os.listdir(PWD):
    if os.path.splitext(f)[1].lower() in ('.jpg','.jpeg'):
      n+=1
      t+=compressimg(f,ver)
  print("Average Compression:%d" %(float(t)/n))
  print("Done")

if __name__ == "__main__":
    main()

Output:

File compressed from 900 to 450 or  50

Average Compression:1

Done

From the above example, we understood that the size of the image is compressed to nearly half of its original size. And in this code, we should install the modules for getting the attributes of the image, And for fetching the image as above code.

Also read: Compress an image to minimize memory size in Python