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pygreyanaglyph.py
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Sat, Feb 22, 09:51

pygreyanaglyph.py
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#!/usr/bin/env python
'''
Combine images
Yves Revaz
mar oct 24 16:35:46 CEST 2006
'''
from numarray import *
from optparse import OptionParser
import string
import sys
import os
import Image
import ImageDraw
import ImageFont
import ImagePalette
import ImageTk
from Nbody import *
def parse_options():
usage = "usage: %prog [options] file"
parser = OptionParser(usage=usage)
# parser.add_option("-f",
# action="store",
# dest="inputfile",
# type="string",
# default = None,
# help="input file",
# metavar=" FILE NAME")
parser.add_option("-o",
action="store",
dest="outputfile",
type="string",
default = None,
help="oputput file",
metavar=" FILE NAME")
(options, args) = parser.parse_args()
if len(args) == 0:
print "you must specify a filename"
sys.exit(0)
files = args
return files,options
def logfilter(mat,cd):
mn = 0.
mx = 255.
mat = 255.*log(1.+(mat-mn)/(cd)) / log(1.+(mx-mn)/(cd))
return mat
def linfilter(mat,mn,mx):
mat = clip(mat,mn,mx)
mat = 255.*(mat-mn)/(mx-mn)
return mat
#############################
# main
#############################
# get options
files,options = parse_options()
#inputfile = options.inputfile
outputfile = options.outputfile
#############################
# open file
#############################
# red
img = Image.open(files[0])
r,g,b = img.split()
r = fromstring(r.tostring(),UInt8)
g = fromstring(g.tostring(),UInt8)
b = fromstring(b.tostring(),UInt8)
# make it gray
# only using gas
palette = Palette('grey')
i = b
#i = linfilter(i,0,128)
i = logfilter(i,64)
r = palette.getr(i)
g = palette.getg(i)
b = palette.getb(i)
# make it gray
#r = r.astype(Float)
#g = g.astype(Float)
#b = b.astype(Float)
#c = sqrt(r*r+g*g+b+b)
#r = c.astype(UInt8)
#g = c.astype(UInt8)
#b = c.astype(UInt8)
size = img.size
r.shape= (size[1],size[0])
g.shape= (size[1],size[0])
b.shape= (size[1],size[0])
# cut image
r2 = r[:,0:size[0]/2]
g2 = g[:,0:size[0]/2]
b2 = b[:,0:size[0]/2]
r1 = r[:,size[0]/2:]
g1 = g[:,size[0]/2:]
b1 = b[:,size[0]/2:]
r = r1
g = g2
b = b2
r = ravel(r)
g = ravel(g)
b = ravel(b)
r = r.astype(UInt8)
g = g.astype(UInt8)
b = b.astype(UInt8)
# new size
size = (size[0]/2,size[1])
image_r = Image.fromstring("L",size,r)
image_g = Image.fromstring("L",size,g)
image_b = Image.fromstring("L",size,b)
# merge image
img = Image.merge("RGB",(image_r,image_g,image_b))
img.save(outputfile)

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