Sometimes it is necessary to resize the images.
The PIL module is used for image processing.
The glob module takes a wildcard and returns the full path of all files and directories matching the wildcard.
Here are two scripts that I made.
The first is a simple example using a resize after some dimensions.
In this case, we used size 300×300.
1 2 3 4 5 6 7 8 | from PIL import Image import glob, os size_file = 300,300 for f in glob.glob("*.png"): file, ext = os.path.splitext(f) img = Image.open(f) img.thumbnail(size_file, Image.ANTIALIAS) img.save("thumb_" + file, "JPEG") |
In the second case, I tried to do a resize with proportion preservation.
1 2 3 4 5 6 7 8 9 10 | import glob import PIL from PIL import Image for f in glob.glob("*.jpg"): img = Image.open(f) dim_percent=(100/float(img.size[0])) dim_size=int((float(img.size[1])*float(dim_percent))) img = img.resize((100,dim_size),PIL.Image.ANTIALIAS) if f[0:2] != "trumb_": img.save("trumb_" + f, "JPEG") |
In both cases, we use a renaming of files by adding the name of thumb_.
Source of the tutorial “How to resize images”