Python script to resize all images in a directory

resize-image.py

# Resize Images in Directory
#
# Provided target frame size (TARGETX, TARGETY) this script will scan current
# directory and scale up an image (keeping same ratio) to best fit.  I used
# this to fix images for a photo frame that would only scale down images but
# would not scale up. 
#
# Jason A Cox - github.com/jasonacox
# 2021 July 30
#
from PIL import Image
import os

# Set the target limits for resize
TARGETX = 1080
TARGETY = 1920

# List files in current directory
entries = filter(os.path.isfile, os.listdir( os.curdir ))

for entry in entries:
    tx = 0
    ty = 0
    if(entry.startswith(".")):
        continue
    im = Image.open(entry)
    (x,y) = im.size
    ratio = y/x
    #print(">     ratio = %f" % ratio)
    if( y < TARGETY and x < TARGETX):
        # need to adjust size
        if(ratio > 1.0):
            # Tall picture - use y for scale
            scale = TARGETY/y
        else:
            scale = TARGETX/x
        #print(">     scale = %f" % scale)
        tx = x * scale
        ty = y * scale
        newsize = (int(tx), int(ty))
        print("> Processing %s - scaling up from %dx%d to %dx%d" % (entry, x, y, tx, ty))
        # resize
        im2 = im.resize(newsize)
        im2.save(entry)
    else:
        # already right size
        print("> Processing %s - no change %dx%d" % (entry, x, y))