图片处理库PIL

Python

图片缩放

from PIL import Image
#打开一个 jpg 图像文件，注意是当前路径:
im = Image.open('/Users/chen/Desktop/gif/11.png')
#获得图片尺寸：
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))
#把缩放后的图像保存:
im.save('/Users/chen/Desktop/gif/thumbnail.png')

图片模糊效果

from PIL import Image, ImageFilter
im = Image.open('/Users/chen/Desktop/gif/11.png')
#应用模糊滤镜:
im2 = im.filter(ImageFilter.BLUR)
im2.save('/Users/chen/Desktop/gif/blur.png')

生成字母验证码图片

from PIL 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))
#随机颜色2:
def rndColor2():
    return (random.randint(32, 127), random.randint(32, 127), random.randint(32, 127),)
#240x60
width = 60*4
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=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')