Python script to resize jpg's

[peewee_RotA]

I had a dilemma of backing up over 3GB of images on my wife's computer so that she can reinstall. As always, python is the solution. I used the following script to resize all of the jpeg images in a directory proportionally based on size. If you decide to reuse this, then you'll want to alter the sizeMod values.

This was written using Python 2.5 with the Python Imaging Library (PIL)

Code: [Select]

import Image
import sys, os
import string

errorOut = sys.stderr
errorOutput = open('imgresize.log', 'w')
sys.stderr = errorOutput

def resizeImg(imgFile):
    print("PY - resizeImg - " + imgFile)

    myLen = len(imgFile)
    myExt = string.lower(imgFile[myLen - 4:myLen])
    if (myExt != ".jpg"):
        print ("Bad extension: " + myExt)
        return

    img1 = Image.open(imgFile)

    img1Size = img1.size
    if img1Size[0] > 3000:
        sizeMod = 0.25       
    elif img1Size[0] > 2000:
        sizeMod = 0.35
    elif img1Size[0] > 1000:
        sizeMod = 0.5
    else:
        print "File " + imgFile + "Already at size X: " + str(img1Size[0]) + " Y: " + str(img1Size[1])
        return

    sizex = img1Size[0] * sizeMod
    sizey = img1Size[1] * sizeMod

    print "Changing file: " + imgFile + " from X: " + str(img1Size[0])+ " Y: " + str(img1Size[1]) + "To X: " + str(sizex) + " Y: " + str(sizey)

    img2 = img1.resize((int(sizex), int(sizey)), Image.ANTIALIAS)

    img2.save(imgFile)

    print("PY - resizeImgSuccess")

def main():
    for root, dirs, files in os.walk("./"):
        for file in files:
            currentFile = os.path.join(root, file)
            if (os.path.isfile(currentFile)):
                resizeImg(currentFile)
            else:
                print "Does Not Exist: " + currentFile       

main()


[peewee_RotA]

NOTE: This function only works in the base directory. If there are any sub directories then it will blow up as soon as it reaches a file inside of one of them. The fix for this is something along the lines of:
os.path.join(root, file)

but I haven't had sufficient time to make that change.


Anybody that can figure this out please post

[peewee_RotA]

Fixed it. I was using the wrong function while testing to check if a file exists but I've figured it out now. Updated original post