python切图，地图切图脚本

python 切图，地图切图脚本

'''
读入一个图片，切成指定数目个小图片(64个)
文件夹名out
'''
from PIL import Image
import sys,os
cut_num = 8 # 8*8=64个图片
#将图片填充为正方形
def fill_image(image):
  width, height = image.size  
  #选取长和宽中较大值作为新图片的
  new_image_length = width if width > height else height  
  #生成新图片[白底]
  #new_image = Image.new(image.mode, (new_image_length, new_image_length), color='white')  
  new_image = Image.new(image.mode, (new_image_length, new_image_length))
  #将之前的图粘贴在新图上，居中 
  if width > height:#原图宽大于高，则填充图片的竖直维度
  #(x,y)二元组表示粘贴上图相对下图的起始位置
    new_image.paste(image, (0, int((new_image_length - height) / 2)))
  else:
    new_image.paste(image, (int((new_image_length - width) / 2),0))
  return new_image
#切图
def cut_image(image):
  width, height = image.size
  item_width = int(width / cut_num)
  box_list = []  
  # (left, upper, right, lower) 
  for i in range(0,cut_num):#两重循环，生成图片基于原图的位置 
    for j in range(0,cut_num):      
      #print((i*item_width,j*item_width,(i+1)*item_width,(j+1)*item_width))
      box = (j*item_width,i*item_width,(j+1)*item_width,(i+1)*item_width)
      box_list.append(box)
 
  image_list = [image.crop(box) for box in box_list]  
  return image_list
#保存
def save_images(image_list):
  index = 1
  for image in image_list:
    image = image.resize((256, 256),Image.ANTIALIAS)
    image.save('out/image_'+str(index) + '.jpg', 'JPEG')
    index += 1
 
if __name__ == '__main__':
  file_path = "temp.jpg"
  os.mkdir("out")
  image = Image.open(file_path)  
  #image.show()
  image = fill_image(image)
  image_list = cut_image(image)
  save_images(image_list)

非原创，作者不详