python切割图片的示例

import os
from PIL import Image

def splitimage(src, rownum, colnum, dstpath):
  img = Image.open(src)
  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(src)
    if dstpath == \'\':
      dstpath = s[0]
    fn = s[1].split(\'.\')
    basename = fn[0]
    ext = fn[-1]

    num = 0
    rowheight = h // rownum
    colwidth = w // colnum
    for r in range(rownum):
      for c in range(colnum):
        box = (c * colwidth, r * rowheight, (c + 1) * colwidth, (r + 1) * rowheight)
        img.crop(box).save(os.path.join(dstpath, basename + \'_\' + str(num) + \'.\' + ext), ext)
        num = num + 1

    print(\'图片切割完毕，共生成 %s 张小图片。\' % num)
  else:
    print(\'不合法的行列切割参数！\')

src = input(\'请输入图片文件路径：\')
if os.path.isfile(src):
  dstpath = input(\'请输入图片输出目录（不输入路径则表示使用源图片所在目录）：\')
  if (dstpath == \'\') or os.path.exists(dstpath):
    row = int(input(\'请输入切割行数：\'))
    col = int(input(\'请输入切割列数：\'))
    if row > 0 and col > 0:
      splitimage(src, row, col, dstpath)
    else:
      print(\'无效的行列切割参数！\')
  else:
    print(\'图片输出目录 %s 不存在！\' % dstpath)
else:
  print(\'图片文件 %s 不存在！\' % src)