python Pillow图像处理方法汇总

#!/usr/bin/env python3
# _*_ coding utf-8 _*_

__author__ = 'nxz'

from PIL import Image, ImageFilter
from time import sleep

# 打开一个jpg图像文件
im = Image.open('test.jpg')
w, h = im.size #
print('图片的宽:%s,和高:%s' % (w, h))

# 图片缩放
im.thumbnail((w // 2, h // 2))
w, h = im.size
print(w, h)

# 缩放之后的图片重新保存
im.save('thumbnail.jpg', 'jpeg')

# 其他功能：切片、旋转、滤镜、输出文字、调色板

# 模糊效果
im2 = im.filter(ImageFilter.BLUR)
im2.save('blur.jpg','jpeg')

from PIL import ImageGrab
from time import sleep

m = int(input("请输入想截屏多少次："))
n = 1
while n <= m:
  sleep(0.02)
  im = ImageGrab.grab()
  local = (r'%s.jpg' % (n))
  im.save(local, 'jpeg')
  n = n + 1

'''
将指定路径下的图片后缀改为 “.jpg” 格式
'''

from PIL import Image
import os, sys

for infile in sys.argv[1:]:
  f, e = os.path.splitext(infile)
  outfile = f + '.jpg'
  if infile != outfile:
    try:
      Image.open(infile).save(outfile)
    except Exception as exc:
      print(exc)

"""
GIf动图
"""

from PIL import Image

im = Image.open('test.jpg')
images = []
images.append(Image.open('blur.png'))
images.append(Image.open('test.jpg'))
im.save('gif.gif', save_all=True, append_image=images, loop=1, duration=1, comment=b'aaaabbb')

#简单的集合变换
out = im.resize((128, 128))

#旋转图像
out = im.transpose(Image.FLIP_LEFT_RIGHT) #翻转
out = im.transpose(Image.FLIP_TOP_BOTTOM)
out = im.transpose(Image.ROTATE_90)
out = im.transpose(Image.ROTATE_180) #旋转180°
out = im.transpose(Image.ROTATE_270) #旋转270°