#! /usr/bin/python
import Image
#Created by vvdr12
#Fully open license. Have fun.
#change threshold value in 'def contrastspoints' for higher/lower line density.
#put a 'test.jpg' file in the same folder as the code.
#_functions______________________________________________
def contrastpoints(x,j,img):
threshold=26
contrast=[]
i=0
l2=1
while l2==1:
r1=img[i,j][0]
b1=img[i,j][1]
g1=img[i,j][2]
ave1=((r1+b1+g1)/3)
r2=img[(i+1),j][0]
b2=img[(i+1),j][1]
g2=img[(i+1),j][2]
ave2=((r2+b2+g2)/3)
r3=img[(i+2),j][0]
b3=img[(i+2),j][1]
g3=img[(i+2),j][2]
ave3=((r3+b3+g3)/3)
r4=img[(i+3),j][0]
b4=img[(i+3),j][1]
g4=img[(i+3),j][2]
ave4=((r4+b4+g4)/3)
if abs(ave2-ave1)>threshold:
if abs(ave1-ave3)>(threshold/2):
contrast.append(i)
i=i+1
if i==(x-3):
l2=0
return contrast
#_Page_Setup____________________________________________
# Asks for the file path
f = raw_input("Please enter your file's full path: ")
source = Image.open(f, 'r')
img = source.load()
print source.format
print source.size
print source.mode
x = source.size[0]
y = source.size[1]
#_______________________________________________________
i=0
j=0#set to 500 for short test run
k=0
l=0
m=0 #contrast func
l1=1
contrast=contrastpoints(x,j,img) #contrast func
print "\n", j, "/", y
while (l1==1):
if len(contrast)>m: #contrast func
if i>=contrast[m]:
img[i,j]=(0,0,0)
m=m+1
i=i+1
if i==(x-1):
contrast=contrastpoints(x,j,img) #contrast func
m=0 #contrast func
i=0
k=k+1
if k==1:
k=0
j=j+1
print j, "/",y
if j==y: #set to 510 for short test run
l1=0
source.save("japanify.png")