python3 实现验证码图片切割的方法

切割前图片

切割后四个图片

代码

#coding:utf8

import os

from PIL import Image,ImageDraw,ImageFile

import numpy

import pytesseract

import cv2

import imagehash

import collections

class pictureIdenti:

#rownum:切割行数;colnum:切割列数;dstpath:图片文件路径;img_name:要切割的图片文件

def splitimage(self, rownum=1, colnum=4, dstpath="D:\work\python3" title="python3">python36_crawl\Veriycode",

img_name="D:\work\python36_crawl\Veriycode\mode_5246.png",):

img = Image.open(img_name)

w, h = img.size

if rownum <= h and colnum <= w:

print('Original image info: %sx%s, %s, %s' % (w, h, img.format, img.mode))

print('开始处理图片切割, 请稍候...')

s = os.path.split(img_name)

if dstpath == '':

dstpath = s[0]

fn = s[1].split('.')

basename = fn[0]

ext = fn[-1]

num = 1

rowheight = h // rownum

colwidth = w // colnum

file_list = []

for r in range(rownum):

index = 0

for c in range(colnum):

# (left, upper, right, lower)

# box = (c * colwidth, r * rowheight, (c + 1) * colwidth, (r + 1) * rowheight)

if index<1:

colwid = colwidth+6

elif index<2:

colwid = colwidth + 1

elif index < 3:

colwid = colwidth

box = (c * colwid, r * rowheight, (c + 1) * colwid, (r + 1) * rowheight)

newfile = os.path.join(dstpath, basename + '_' + str(num) + '.' + ext)

file_list.append(newfile)

img.crop(box).save(os.path.join(dstpath, basename + '_' + str(num) + '.' + ext), ext)

num = num + 1

index+=1

for f in file_list:

print(f)

print('图片切割完毕,共生成 %s 张小图片。' % num)

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