[Image-SIG] PIL image size after rotate
Chad Ferguson
terrafergus at gmail.com
Sun Nov 11 05:01:45 CET 2012
Listers,
I have a very simple script that rotates images using PIL. After
running, the output images are about 1/3 the file size of the input
image. The file attributes indicate they have increased in resolution
from 72 to 96 ppi but have the same radiometric depth. Does the PIL
rotate method apply a hidden resampling? Why are the output images so
much smaller?
from PIL import Image
import glob, os
indir = r'C:\Users\Me\Pictures\export'
for infile in glob.glob(indir + '\\' + "*.jpg"):
print infile
file, ext = os.path.splitext(infile)
im = Image.open(infile)
im2 = im.rotate(270)
im2.save(file +"_rotate.jpg", "JPEG")
# os.remove(infile)
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