python基础-第三方模块PIL_绘图,验证码

  PIL:Python Imaging Library,Python平台上图像处理标准库,L功能非常强大,API简单易用.

一、安装PIL

  可通过 easy_install 、 pip、PIL官方网站下载exe安装包等方法安装

二、图像操作

  1、缩放操作:

>>> import Image
>>> im = Image.open('C:\Users\wcc\Desktop\devushka-vzglyad-lico-golovnoy.jpg')
>>> w,h = im.size
>>> im.thumbnail((w//2,h//2))    #缩小
>>> im.save('C:\Users\wcc\Desktop\devushka-vzglyad-lico-golovnoysss.jpg')

  2、模糊效果:

>>> import Image
>>> import ImageFilter
>>> im2 = im.filter(ImageFilter.BLUR)
>>> im2.save('C:\Users\wcc\Desktop\devushka-vzglyad-lico-golovnoyaaa.jpg')
>>>

  3、绘图操作,生成验证码:

#!/usr/bin/env python
#coding:utf-8

import Image,ImageDraw,ImageFont,ImageFilter
import random

#随机字母:
def rndChar():
    return chr(random.randint(65,90))

#随机颜色1:
def rndColor():
    return (random.randint(64,255),random.randint(64,255),random.randint(64,255))

#240 x 60:
width = 60 * 4
heigh = 60
image = Image.new('RGB',(width,heigh),(255,255,255))
#创建font对象:
font = ImageFont.truetype('Arial.ttf',36)
#创建Draw对象:
draw = ImageDraw.Draw(image)

for  x in range(width):
    for y in range(heigh):
        draw.point((x,y),fill=rndColor())

#输出文字:
for t in range(4):
    draw.text((60 * t + 10,10),rndChar(),font=font,fill=rndColor())
#模糊:
image = image.filter(ImageFilter.BLUR)
image.save('code.jpg','jpeg')

 

效果图如下:

 

详细了解PIL的强大功能,请请参考PIL官方文档 

 

posted @ 2015-11-27 19:57  超超xc  Views(486)  Comments(0Edit  收藏  举报
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