A simple example of how to create an image verification code in Python

This article mainly introduces Pythonsimple production of PicturesVerification Code examples, which has certain reference value. Interested friends can refer to it Take a look

The verification codes demonstrated here are all simple, you can also twist the characters

The Python third-party library is extremely powerful, PIL is A third-party image processing module for Python, we can also use it to generate image verification codes

PILInstallation

Command installation:

pip install pillow

Example: Generate a picture and fill it with text

#!/usr/bin/python
#-*-coding:utf-8-*-
from PIL import Image, ImageDraw, ImageFont, ImageFilter
# 实例一个图片对象240 x 60:
width = 60 * 4
height = 60
# 图片颜色
clo = (43, 34, 88) # 我觉得是紫蓝色
image = Image.new('RGB', (width, height), clo)

# 创建Font对象:
# 字体文件可以使用操作系统的，也可以网上下载
font = ImageFont.truetype('./font/Arial.ttf', 36)

# 创建Draw对象:
draw = ImageDraw.Draw(image)

# 输出文字:
str1 = "ren ren Python"
w = 4 #距离图片左边距离
h = 10 #距离图片上边距离
draw.text((w, h), str1, font=font)
# 模糊:
image.filter(ImageFilter.BLUR)
code_name = 'test_code_img.jpg'
save_dir = './{}'.format(code_name)
image.save(save_dir, 'jpeg')
print("已保存图片: {}".format(save_dir))

(venv) allenwoo@~/renren/code$ python test2.py 
已保存图片: ./test_code_img.jpg

The picture is as follows:

The text has no color, we can also add color , just pass the fill parameter in the text

draw.text((w, h), str1, font=font, fill = (78, 64, 65))

Add any color

##We can also make the background into many small Click, fill every n pixels with another color, for example:

#!/usr/bin/python
#-*-coding:utf-8-*-
from PIL import Image, ImageDraw, ImageFont, ImageFilter
# 实例一个图片对象240 x 60:
width = 60 * 4
height = 60
# 图片颜色
clo = (43, 34, 88) # 我觉得是紫蓝色
image = Image.new('RGB', (width, height), clo)

# 创建Font对象:
# 字体文件可以使用操作系统的，也可以网上下载
font = ImageFont.truetype('./font/Arial.ttf', 36)

# 创建Draw对象:
draw = ImageDraw.Draw(image)

# 填充像素:
# 宽每隔 20， 高每隔5, 形成坐标x,y
# 红色：220,20,60
for x in range(0, width, 20):
  for y in range(0, height, 5):
    draw.point((x, y), fill=(220, 20, 60))

# 输出文字:
str1 = "we are renren"
w = 4 #距离图片左边距离
h = 10 #距离图片上边距离
draw.text((w, h), str1, font=font, fill = (78, 64, 65))
# 模糊:
image.filter(ImageFilter.BLUR)
code_name = 'test_code_img.jpg'
save_dir = './{}'.format(code_name)
image.save(save_dir, 'jpeg')
print("已保存图片: {}".format(save_dir))

Result picture:

##PIL production verification code

Using the above and the random

generator

random we learned before, we can make a verification code,
Generate verification code code

#!/usr/bin/python
#-*-coding:utf-8-*-
from uuid import uuid1
from PIL import Image, ImageDraw, ImageFont, ImageFilter
import random
def rnd_char():
  '''
  随机一个字母或者数字
  :return: 
  '''
  # 随机一个字母或者数字
  i = random.randint(1,3)
  if i == 1:
    # 随机个数字的十进制ASCII码
    an = random.randint(97, 122)
  elif i == 2:
    # 随机个小写字母的十进制ASCII码
    an = random.randint(65, 90)
  else:
    # 随机个大写字母的十进制ASCII码
    an = random.randint(48, 57)
  # 根据Ascii码转成字符，return回去
  return chr(an)

#　干扰
def rnd_dis():
  '''
  随机一个干扰字
  :return: 
  '''
  d = ['^','-', '~', '_', '.']
  i = random.randint(0, len(d)-1)
  return d[i]

# 两个随机颜色都规定不同的区域，防止干扰字符和验证码字符颜色一样
# 随机颜色1:
def rnd_color():
  '''
  随机颜色，规定一定范围
  :return: 
  '''
  return (random.randint(64, 255), random.randint(64, 255), random.randint(64, 255))

# 随机颜色2:
def rnd_color2():
  '''
   随机颜色，规定一定范围
   :return: 
   '''
  return (random.randint(32, 127), random.randint(32, 127), random.randint(32, 127))

def create_code():
  # 240 x 60:
  width = 60 * 4
  height = 60
  image = Image.new('RGB', (width, height), (192, 192, 192))
  # 创建Font对象:
  font = ImageFont.truetype('./font/Arial.ttf', 36)

  # 创建Draw对象:
  draw = ImageDraw.Draw(image)

  # 填充每个像素:
  for x in range(0, width, 20):
    for y in range(0, height, 10):
      draw.point((x, y), fill=rnd_color())

  # 填充字符
  _str = ""
  # 填入4个随机的数字或字母作为验证码
  for t in range(4):
    c = rnd_char()
    _str = "{}{}".format(_str, c)

    # 随机距离图片上边高度，但至少距离30像素
    h = random.randint(1, height-30)
    # 宽度的化，每个字符占图片宽度1／4,在加上10个像素空隙
    w = width/4 * t + 10
    draw.text((w, h), c, font=font, fill=rnd_color2())

  # 实际项目中，会将验证码 保存在数据库，并加上时间字段
  print("保存验证码 {} 到数据库".format(_str))

  # 给图片加上字符干扰，密集度由 w, h控制
  for j in range(0, width, 30):
    dis = rnd_dis()
    w = t * 15 + j

    # 随机距离图片上边高度，但至少距离30像素
    h = random.randint(1, height - 30)
    draw.text((w, h), dis, font=font, fill=rndColor())

  # 模糊:

  image.filter(ImageFilter.BLUR)

  # uuid1 生成唯一的字符串作为验证码图片名称
  code_name = '{}.jpg'.format(uuid1())
  save_dir = './{}'.format(code_name)
  image.save(save_dir, 'jpeg')
  print("已保存图片: {}".format(save_dir))

# 当直接运行文件的是和，运行下面代码
if name == "main":
  create_code()

(venv) allenwoo@~/renren/code$ python test.py 
保存验证码 ef3k 到数据库
已保存图片: ./c86e03c0-1c23-11e7-999d-f45c89c09e61.jpg
(venv) allenwoo@~/renren/code$ python test.py 
保存验证码 I37X 到数据库
已保存图片: ./cb8aed02-1c23-11e7-9b18-f45c89c09e61.jpg
(venv) allenwoo@~/renren/code$ python test.py 
保存验证码 vVL1 到数据库
已保存图片: ./cc120da8-1c23-11e7-b762-f45c89c09e61.jpg
(venv) allenwoo@~/renren/code$ python test.py 
保存验证码 K6w3 到数据库
已保存图片: ./cc891e05-1c23-11e7-b7ec-f45c89c09e61.jpg

## Do you find it difficult? Finally, there are some logical issues in the code that generates the verification code that need to be understood

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