PIL浅谈

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1. 安装

 python2.x 执行 pip install PIL
 
 python3.x 执行 pip3 install Pillow

2.图片缩放

    from PIL import Image
    image = Image.open('1.jpg')
     #获取图像宽高
    w,h = image.size
    print('original image size :%sx%s' %(w,h))
    #缩放
    image.thumbnail((w//2,h//2))
    print('thumbnial image size:%sx%s' %(w//2,h//2))
    image.save('thumbnial.jpg','jpeg') ```

3.模糊图片

 模糊图片主要用到ImageFilter 导入 from PIL import ImageFilter
 ```image = Image.open('thumbnial.jpg')
     #图片模糊
    image1 = image.filter(ImageFilter.BLUR)
    image1.save('dim.jpg','jpeg') ```

4.动态生成验证码

   生成动态验证码主要用到ImageDraw,ImageFont这两个类，导入 
   from PIL import ImageDraw，ImageFont
  ```
    #随机字符串
   def randomChar():
       return chr(random.randint(65,90))
   #随机rgb的值
  def randomColor():
        return(random.randint(32,127),
                   random.randint(10,127),random.randint(20,157))
  def randomColor2():
        return (random.randint(64,255),
                   random.randint(64,255),random.randint(64,255))
  def drawRandomCode():
        width = 60*4
        height = 60
        image = Image.new('RGB',(width,height),(255,255,255))
       #创建font对象
        font = ImageFont.truetype('Monaco.ttf',36)
       #创建draw对象
        draw = ImageDraw.Draw(image)
       #填充像素
        for x in range(width):
            for y in range(height):
                draw.point((x,y),fill=randomColor2())
        for t in range(4):
             draw.text((60*t+10,10),randomChar(),
                        font=font,fill=randomColor())
        image = image.filter(ImageFilter.BLUR)
        image.save('code.jpg','jpeg')
    ```