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main.py
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Mon, Apr 7, 18:12

main.py
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import sys,os,string
from numarray import *
import Image
import ImageDraw
import ImageFont
import ImagePalette
import ImageTk
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
def open_image(file):
img = Image.open(file)
r,g,b = img.split()
r = fromstring(r.tostring(),UInt8)
g = fromstring(g.tostring(),UInt8)
b = fromstring(b.tostring(),UInt8)
r.shape= (img.size[1],img.size[0])
g.shape= (img.size[1],img.size[0])
b.shape= (img.size[1],img.size[0])
return r,g,b,img.size
def write_image(file,size,r,g,b,quality=75,geometry=100.):
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))
# resize image
#geometry = geometry/100.
#shape = (int(img.size[0]*geometry),int(img.size[1]*geometry))
#img = img.transform(shape,Image.AFFINE,(1/geometry,0.,0.,0.,1/geometry,0.),Image.NEAREST)
img.save(file,quality=quality)
def convert_to_gray(r,g,b,f):
r = r.astype(Float)
g = g.astype(Float)
b = b.astype(Float)
rg = sqrt((r**2+g**2+b**2)/3)
gg = rg
bg = rg
rg = f*rg + (1.-f)*r
gg = f*gg + (1.-f)*g
bg = f*bg + (1.-f)*b
rg = rg.astype(UInt8)
gg = gg.astype(UInt8)
bg = bg.astype(UInt8)
return rg,gg,bg

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