#coding=utf-8 去除验证码的横线，但是效果一般般

"""

creat time:2015.09.14

"""

# import cv2

import numpy as np

from matplotlib import pyplot as plt

from PIL import Image,ImageEnhance,ImageFilter

img_name = '2b.jpg'

#去除干扰线

im = Image.open(img_name)

#图像二值化

enhancer = ImageEnhance.Contrast(im)

im = enhancer.enhance(2)

im = im.convert('1')

data = im.getdata()

w,h = im.size

#im.show()

black_point = 0

for x in range(1,w-1):

for y in range(1,h-1):

mid_pixel = data[w*y+x] #中央像素点像素值

if mid_pixel == 0: #找出上下左右四个方向像素点像素值

top_pixel = data[w*(y-1)+x]

left_pixel = data[w*y+(x-1)]

down_pixel = data[w*(y+1)+x]

right_pixel = data[w*y+(x+1)]

#判断上下左右的黑色像素点总个数

if top_pixel == 0:

black_point += 1

if left_pixel == 0:

black_point += 1

if down_pixel == 0:

black_point += 1

if right_pixel == 0:

black_point += 1

if black_point >= 3:

im.putpixel((x,y),0)

#print black_point

black_point = 0

im.save('new'+ img_name)

im.show()