====== Image Processing ======
===== Pillow =====
refer: http://effbot.org/imagingbook/
==== Image Module ====
==== ImageDraw Module ====
===== Psd tools =====
source: https://github.com/kmike/psd-tools
refer API: http://searchcode.babies.vn:8080/source/xref/python2.7/site-packages/psd_tools/user_api/psd_image.py
==== Install ====
  * windows:<code bat>
SET VS90COMNTOOLS=%VS100COMNTOOLS%
easy_install.exe psd-tools
easy_install.exe packbits
</code>
  * linux:<code bash>
pip install psd-tools
pip install packbits
</code>
==== Using Psd tools ====
=== Read psd file and get header, layers(contain layers and groups) ===
  * PSDImage.load return **psd_tools.user_api.psd_image.PSDImage** object
  * **psd_tools.user_api.psd_image.PSDImage** contain list of objects **psd_tools.Group** and **psd_tools.Layer**
Basic Examples:
  * Read header and layers:<code python>
from psd_tools import PSDImage

psd = PSDImage.load('1203.psd')
print psd.header
print psd.layers
</code>output:<code>
PsdHeader(number_of_channels=4, height=1186, width=1181, depth=8, color_mode=CMYK)
[<psd_tools.Layer: u'COMPANY copy 2', size=528x35, x=286, y=666>, <psd_tools.Layer: u'COMPANY', size=738x88, x=108, y=742>, <psd_tools.Layer: u'Layer 2', size=535x388,
 u'Layer 3', size=1181x1186, x=0, y=0>]
</code>
  * Save all layers and groups:<code python>
from psd_tools import PSDImage
from psd_tools.user_api.psd_image import PSDImage as UserImage

psd = PSDImage.load('1203.psd')
for layer in psd.layers:
    pil_img = layer.as_PIL()
    pil_img.save(layer.name + '.png')
</code>
=== working with group(psd_tools.Group) ===
=== working with layer(psd_tools.Layer) ===
=== export psd file to png ===
psd.as_PIL() return object **PIL.Image.Image**
  * Simple export<code python>
from psd_tools import PSDImage
from psd_tools.user_api.psd_image import PSDImage as UserImage

psd = PSDImage.load('1203.psd')
merge_img = psd.as_PIL()
merge_img.save('1203.png')
</code>
  * script export psd to png file:<code python>
from psd_tools import PSDImage
import sys, os
import re
from os import path

def convertpsd2png(psdfilename, outpath = ''):    
    psd = PSDImage.load(psdfilename)
    pil_img = psd.as_PIL()
    pngfilename = re.sub('.psd', '.png', path.basename(psdfilename))
    pngfilename = path.join(outpath, pngfilename)
    if outpath != '' and not path.exists(outpath):
        os.makedirs(outpath)
    print pngfilename
    pil_img.save(pngfilename)
nargs = len(sys.argv)
outpath = ''
if nargs <= 1:
    print 'please input psd file'
    exit()
elif nargs >=2:
    outpath = sys.argv[2]
psdfilename = sys.argv[1]
if path.exists(psdfilename):
    ext = path.splitext(psdfilename)[1]
    if ext == '.psd':
        convertpsd2png(psdfilename, outpath)
    else:
        print 'the extension of file is incorrect'
else:
    print 'file is not exists:', psdfilename
</code>script to run for multiple files:<code bat>
for /F "delims=\r\n" %x in ('dir /B indir') do psd2png.py indir\%x outdir
</code>