python

使用

PIL

縮放網絡圖片并保存的方法

本文實例講述了

python

使用

PIL

縮放網絡圖片并保存的方法。

分享給大家供大家參考。

具體實現方法如下：

'''?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?=?""

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