This is part of a series of short blog posts about automating boring repetitive work using Python.
The following code automatically resizes all images in the directory specified in mypath to 4R aspect ratio. 4R images have a size of 4 inches by 6 inches (or 10.2 cm by 15.2 cm), which means that images must have a 2 by 3 aspect ratio.
# Import libraries
from PIL import Image
from os import listdir
from os.path import isfile, join
# Directory containing the images
mypath = 'Photos For Printing'
d1 = 4 # First dimension
d2 = 6 # Second dimension
# Resize mode: Crop or extend with white space?
#mode = 'Crop'
mode = 'Extend'
files = [f for f in listdir(mypath) if isfile(join(mypath, f))]
for myfile in files:
# Opens a image in RGB mode
im = Image.open(mypath+'/'+myfile)
# Process image
if mode == 'Crop':
if im.height < im.width:
h = d1
w = d2
if im.width / im.height > d2 / d1:
w = im.width
h = im.width * d1 / d2
# Setting the points for cropped image
left = 0
top = int( (im.height - h) / 2 )
right = im.width
bottom = int( m.height - (im.height - h) / 2 )
else:
w = im.width * d1 / d2
h = im.height
# Setting the points for cropped image
left = int( (im.width - w) / 2 )
top = 0
right = int( im.width - (im.width - w) / 2 )
bottom = im.width
else:
h = d2
w = d1
if im.height / im.width > d2 / d1:
w = im.width * d1 / d2
h = im.height
# Setting the points for cropped image
left = int( (im.width - w) / 2 )
top = 0
right = int( im.width - (im.width - w) / 2 )
bottom = im.width
else:
w = im.width
h = im.width * d1 / d2
# Setting the points for cropped image
left = 0
top = int( (im.height - h) / 2 )
right = im.width
bottom = int( m.height - (im.height - h) / 2 )
else:
if im.height < im.width:
h = d1
w = d2
if im.width / im.height > d2 / d1:
w = im.width
h = im.width * d1 / d2
# Setting the points for extended image
left = 0
top = int( (im.height - h) / 2 )
right = im.width
bottom = int( im.height - (im.height - h) / 2 )
else:
w = im.height * d2 / d1
h = im.height
# Setting the points for extended image
left = int( (im.width - w) / 2 )
top = 0
right = int( im.width - (im.width - w) / 2 )
bottom = im.height
else:
h = d2
w = d1
if im.height / im.width > d2 / d1:
w = im.height * d1 / d2
h = im.height
# Setting the points for extended image
left = int( (im.width - w) / 2 )
top = 0
right = int( im.width - (im.width - w) / 2 )
bottom = im.height
else:
w = im.width
h = im.width * d2 / d1
# Setting the points for extended image
left = 0
top = int( (im.height - h) / 2 )
right = im.width
bottom = int( im.height - (im.height - h) / 2 )
# Cropped image of above dimension
im1 = Image.new('RGB', (right - left, bottom - top), (255, 255, 255))
im1.paste(im, (-left, -top))
# Save image
im1.save(mypath+'/'+myfile)