gray to bw

[dyasam]

import matplotlib.pyplot as plt
import matplotlib.image as mpimg
import numpy as np
img=mpimg.imread('orman.jpg')
%matplotlib inline

def get_distance (v,w=[1/3,1/3,1/3]):
a,b,c=v[0],v[1],v[2]
w1,w2,w3=w[0],w[1],w[2]
d=((a2)*w1+(b2)*w2+(c**2)*w3)**5
return d

def convert_graytobw(image):
m=image.shape[0]
n=image.shape[1]
im_bw=np.zeros((m,n))
for i in range (m):
for j in range(n):
if im_bw[i,j]>120:
im_bw[i,j]=1
else:
im_bw[i,j]=0
im_bw[i,j]=get_distance(image[i,j,:])
return im_bw

im_4= convert_graytobw(img)

plt.subplot(1,3,1),plt.imshow(img)
plt.subplot(1,3,2),plt.imshow(im_4, cmap='gray')