"""
You can use matplotlib to generate thumbnails from existing images.
matplotlib natively supports PNG files on the input side, and other
image types transparently if your have PIL installed
"""
# build thumbnails of all images in a directory
import sys, os, glob
import matplotlib.image as image
if len(sys.argv)!=2:
print 'Usage: python %s IMAGEDIR'%__file__
raise SystemExit
indir = sys.argv[1]
if not os.path.isdir(indir):
print 'Could not find input directory "%s"'%indir
raise SystemExit
outdir = 'thumbs'
if not os.path.exists(outdir):
os.makedirs(outdir)
for fname in glob.glob(os.path.join(indir, '*.png')):
basedir, basename = os.path.split(fname)
outfile = os.path.join(outdir, basename)
fig = image.thumbnail(fname, outfile, scale=0.15)
print 'saved thumbnail of %s to %s'%(fname, outfile)
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