python学习 day18 第三方模块

# ****第三方模块 PIL,操作图像,可以通过简单的代码完成复杂的图像处理
from PIL import Image
# 打开一个jpg图像文件，注意是当前路径:
im = Image.open('test.jpg')
# 获得图像尺寸:
w,h = im.size
print('Original image size: %sx%s' % (w,h))
# 缩放到50%:
im.thumbnail((w//2,h//2))
print('Resize image to: %sx%s' % (w//2,h//2))
# 把缩放后的图像用jpeg格式保存
im.save('thumbnail.jpg','jpeg')

from PIL import Image, ImageFilter

# 打开一个jpg图像文件，注意是当前路径:
im = Image.open('test.jpg')
# 应用模糊滤镜:
im2 = im.filter(ImageFilter.BLUR)
im2.save('blur.jpg', 'jpeg')

# 生成字母验证码图片
from PIL import Image, ImageDraw, ImageFont, ImageFilter

import random

# 随机大写字母:
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))

# 随机颜色2:
def rndColor2():
    return (random.randint(32, 127), random.randint(32, 127), random.randint(32, 127))

# 240 x 60:
width = 60 * 4
height = 60
image = Image.new('RGB', (width, height), (255, 255, 255))
# 创建Font对象:
font = ImageFont.truetype('C:\Windows\Fonts\Arial.ttf', 36)
# 创建Draw对象:
draw = ImageDraw.Draw(image)
# 填充每个像素:
for x in range(width):
    for y in range(height):
        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=rndColor2())
# 模糊:
image = image.filter(ImageFilter.BLUR)
image.save('code.jpg', 'jpeg')