• 欢迎访问开心洋葱网站,在线教程,推荐使用最新版火狐浏览器和Chrome浏览器访问本网站,欢迎加入开心洋葱 QQ群
  • 为方便开心洋葱网用户,开心洋葱官网已经开启复制功能!
  • 欢迎访问开心洋葱网站,手机也能访问哦~欢迎加入开心洋葱多维思维学习平台 QQ群
  • 如果您觉得本站非常有看点,那么赶紧使用Ctrl+D 收藏开心洋葱吧~~~~~~~~~~~~~!
  • 由于近期流量激增,小站的ECS没能经的起亲们的访问,本站依然没有盈利,如果各位看如果觉着文字不错,还请看官给小站打个赏~~~~~~~~~~~~~!

python如何使用PIL缩放互联网上的图片并保存

python 水墨上仙 1212次浏览

python通过PIL缩放互联网上的图片并保存

''' tk_image_view_url_io_resize.py
display an image from a URL using Tkinter, PIL and data_stream
also resize the web image to fit a certain size display widget
retaining its aspect ratio
Pil facilitates resizing and allows file formats other then gif
tested with Python27 and Python33  by  vegaseat  18mar2013
'''

import io
from PIL import Image, ImageTk
try:
    # Python2
    import Tkinter as tk
    from urllib2 import urlopen
except ImportError:
    # Python3
    import tkinter as tk
    from urllib.request import urlopen

def resize(w, h, w_box, h_box, pil_image):
    '''
    resize a pil_image object so it will fit into
    a box of size w_box times h_box, but retain aspect ratio
    '''
    f1 = 1.0*w_box/w  # 1.0 forces float division in Python2
    f2 = 1.0*h_box/h
    factor = min([f1, f2])
    #print(f1, f2, factor)  # test
    # use best down-sizing filter
    width = int(w*factor)
    height = int(h*factor)
    return pil_image.resize((width, height), Image.ANTIALIAS)

root = tk.Tk()

# size of image display box you want
w_box = 400
h_box = 350

# find yourself a picture on an internet web page you like
# (right click on the picture, under properties copy the address)
# a larger (1600 x 1200) picture from the internet
# url name is long, so split it
url1 = "http://freeflowerpictures.net/image/flowers/petunia/"
url2 = "petunia-flower.jpg"
url = url1 + url2

image_bytes = urlopen(url).read()
# internal data file
data_stream = io.BytesIO(image_bytes)
# open as a PIL image object
pil_image = Image.open(data_stream)

# get the size of the image
w, h = pil_image.size

# resize the image so it retains its aspect ration
# but fits into the specified display box
pil_image_resized = resize(w, h, w_box, h_box, pil_image)

# optionally show resized image info ...
# get the size of the resized image
wr, hr = pil_image_resized.size
# split off image file name
fname = url.split('/')[-1]
sf = "resized {} ({}x{})".format(fname, wr, hr)
root.title(sf)

# convert PIL image object to Tkinter PhotoImage object
tk_image = ImageTk.PhotoImage(pil_image_resized)

# put the image on a widget the size of the specified display box
label = tk.Label(root, image=tk_image, width=w_box, height=h_box)
label.pack(padx=5, pady=5)

root.mainloop()


开心洋葱 , 版权所有丨如未注明 , 均为原创丨未经授权请勿修改 , 转载请注明python如何使用PIL缩放互联网上的图片并保存
喜欢 (0)
加载中……