Python PIL 图片添加水印
工作需要每天发彩信日报，日报里面添加一张图片，包括彩信编号和今天的日期，于是学习写了下面的小程序，站在这里留念一下
from PIL import Image, ImageDraw, ImageFont
import time
def watermark(img, img_ed, date, number, fnt):
"""Adds a watermark to an image."""
#draw the watermark on the empty pic at a specified position
img_draw = ImageDraw.Draw(img_ed)
img_draw.text((134, 179), date, font=fnt, fill=(255,255,255,255))
img_draw.text((170, 10), number, font=fnt, fill=(255,255,255,255))
out = Image.alpha_composite(img, img_ed)
out.save("1.gif")
print "saved as gif"
def daily():
img = Image.open("D:\SCMDR.gif").convert('RGBA')
date = time.strftime("%Y/%m/%d")
number = raw_input("Input the number please:")
#make a blank image for the text, initialized to transparent text color
img_ed = Image.new('RGBA', img.size, (255,255,255,0))
h,w = img.size
#draw txt on the pic
fnt = ImageFont.truetype('E:\myexp\运维日报\MSYH.ttc',12)
watermark(img, img_ed, date, number, fnt)
if __name__ == '__main__':
daily()主要的过程是：
1、获取这个图片
2、构造一个一样大小的白色图片
3、把相关文字draw到那个白色图片上
4、把两张图片合并起来即可