python将1張圖檔分割成9張

• 思路

• 代碼

# -*- coding: utf-8 -*-
'''
将一張圖檔填充為正方形後切為9張圖
Author:
'''
from PIL import Image
import sys

#将圖檔填充為正方形
def fill_image(image):
    width, height = image.size
    #選取長和寬中較大值作為新圖檔的
    new_image_length = width if width > height else height
    #生成新圖檔[白底]
    new_image = Image.new(image.mode, (new_image_length, new_image_length), color='white')
    #将之前的圖粘貼在新圖上，居中
    if width > height:#原圖寬大于高，則填充圖檔的豎直次元
        #(x,y)二進制組表示粘貼上圖相對下圖的起始位置
        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

#切圖
def cut_image(image):
    width, height = image.size
    item_width = int(width / 3)
    box_list = []
    # (left, upper, right, lower)
    for i in range(0,3):#兩重循環，生成9張圖檔基于原圖的位置
        for j in range(0,3):
            #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

#儲存
def save_images(image_list):
    index = 1
    for image in image_list:
        image.save('./img/'+str(index) + '.png', 'PNG')
        index += 1

if __name__ == '__main__':
    file_path = "1.jpg"
    image = Image.open(file_path)
    #image.show()
    image = fill_image(image)
    image_list = cut_image(image)
    save_images(image_list)           

複制

參考：https://zhuanlan.zhihu.com/p/34658133