Python编程：pillow处理图像生成验证码图片

安装

pip install pillow

缩略图

from PIL import Image

def thumbnail(image_path, save_path, scale=2):
    img = Image.open(image_path)
    # 图片尺寸
    w, h = img.size
    # 缩放图片
    img.thumbnail((w//scale, h//scale))
    # 保存
    img.save(save_path, 'jpeg')

模糊效果

from PIL import Image

def filter(image_path, save_path):
    img = Image.open(image_path)
    img2 = img.filter(ImageFilter.BLUR)
    img2.save(save_path, 'jpeg')

生成字母验证码图片

import random
import string
from PIL import Image, ImageFilter, ImageFont, ImageDraw

# 获取一个字母或数字
def get_char():
    return random.choice(string.ascii_letters + string.digits)

# 获取颜色值
def get_color1():
    return (random.randint(64, 255), random.randint(64, 255), random.randint(64, 255))

def get_color2():
    return (random.randint(32, 127), random.randint(32, 127), random.randint(32, 127))

# 生成字母验证码图片
def get_checkcode_image(n, save_path):
    """
    @param n: {int} 字母数量
    @param save_path: {str} 保存路径
    @return: None
    """
    # 图片尺寸
    width = 60*n
    height = 60

    image = Image.new("RGB", (width, height), (255, 255, 255))
    # 创建Font对象
    font = ImageFont.truetype('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=get_color1())

    # 输出文字
    for i in range(n):
        draw.text((60 * i + 10, 10), get_char(), font=font, fill=get_color2())

    # 模糊处理
    image = image.filter(ImageFilter.BLUR)

    image.save(save_path, "jpeg", dpi=(300.0, 300.0))


if __name__ == '__main__':
    image_path = "images/my_image.png"
    save_path = "thumbnail.jpg"
    thumbnail(image_path, save_path)
    filter(image_path, "filter.jpg")
    get_checkcode_image(4, "code.jpg")

参考
​​廖雪峰python-pillow​​