#!/usr/bin/python
import Image, os

def resizepic(oldname, newname, res):
    print 'resizing %s to %s.' %(oldname, newname)
    im = Image.open(oldname)
    out = im.resize(res, Image.ANTIALIAS)
    out.save(newname)
    new_bytes = os.path.getsize(newname)
    if new_bytes > 450000:
        print 'Warning, the size of %s is %d bytes' %(newname, new_bytes)

def suggest_new_name(oldname):
    newname = oldname.replace('.JPG', '_s.JPG')
    return newname

res = (900,900)
dirname = 'lowres'
try:
    os.mkdir(dirname)
except:
    pass

for filename in os.listdir('.'):
    if not filename.endswith('.JPG'):
        continue
    newname = os.path.join(dirname, suggest_new_name(filename))
    resizepic(filename, newname, res)
-----------------------------------------------------------------------------------------
dalsi programek funguje takto, v aktualnim adresari vytvori male atd...

mkdir male; for file in *.JPG ; do echo $file; convert -size 900x900 -resize 900x900 -sharpen 0.01 -strip -quality 95 "$file" "male/$file"; done

mkdir male; for file in P1*.JPG ; do echo $file; convert -size 900x900 -resize 900x900 -strip -quality 95 "$file" "male/$file"; done


-----------------------------------------------------------------------------------------
zmena nazvu

for i in *.JPG; do
  new_name="`echo $i | sed "s/^[^_]*_//" | sed "s/_.*//"`.JPG"
  mv $i $new_name
done
----------------------------------------------------
for i in *.JPG; do
  new_name="`echo $i | sed "s/^[^_]*_//" | sed "s/_.*//"`.JPG"
  mv $i $new_name
done
----------------------------
dovolena###%e

--------------------------------
#!/bin/bash
echo "zadej cislo"
read count
find . -iname '*.jpg' -type f  | while read F
do count=`expr $count + 1`
convert -strip -quality 80 -resize 800 "$F" img00"$count".jpg
convert -strip -quality 70 -resize 122 "$F" tn00"$count".jpg
rm -rf "$F"
done
-------------------------------------------------
Tento skript po zadani cisla prejmenuje vsechny jpg na tvar img00"cislo+1".jpg a smazne puvodni:

#!/bin/bash
echo "zadej cislo"
read count
find . -iname '*.JPG' -type f  | while read F
do count=`expr $count + 1`
cp "$F" jura07_"$count".jpg
rm -rf "$F"
done