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:utf8importosfromPILimportImage,ImageDraw,ImageFileimportnumpyimportpyt

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\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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