python居中函数_Python 图片居中裁剪函数

import math

from PIL import Image

import os

# 打开图片

pil_img = Image.open('./test.jpg')

# 创建文件夹

if os.path.exists('./img/') == False:

os.makedirs('./img/')

# 图片裁剪的尺寸

width = 180

height = 180

# 原图尺寸

img_size = pil_img.size

# 计算新图片尺寸

if (img_size[0] - width) > (img_size[1] - height):

new_size = int(height / img_size[1] * img_size[0])

# 等比缩放后的尺寸

resize_arr = (new_size, height)

coordinate = math.ceil((new_size - width) / 2)

# 裁剪的数据

crop_arr = (coordinate, 0, coordinate + width, height)

else:

new_size = int(width / img_size[0] * img_size[1])

# 等比缩放后的尺寸

resize_arr = (width, new_size)

coordinate = math.ceil((new_size - height) / 2)

# 裁剪的数据

crop_arr = (0, coordinate, width, coordinate + height)

# 等比缩放图片 将图片缩放到与需要裁剪的尺寸相近的大小

pil_img = pil_img.resize(resize_arr, Image.ANTIALIAS)

# 裁剪图片

pil_img = pil_img.crop(crop_arr)

# 保存新图片

pil_img.save('./img/crop1.jpg')