Classic-Captcha-Generator

Generator of classic captchas images, numbers and letters, lines, points, multicolor and deformations.

Dependencies

• Pillow

Basic operation

• Save captcha image (We use jpg because captchas generally need to be light and compressible):

  from captcha import Captcha
  name = "my_captcha.jpg"
  Captcha().save(name)

• Get captcha image value for verification:

  from captcha import Captcha
  my_captcha = Captcha()
  value_captcha = my_captcha.get_value()

Personalization

The options to customize [with their corresponding parameters and type in parentheses] are:

• Character set to use (chars : str)
• Number of characters in the captcha (amount : int)
• Image mode [RGB, RGBA, etc.] (mode : str)
• Image size in pixels, width and height respectively (size : tuple)
• Background color in RGB format in tuple (bg_color : tuple)
• Font size in pixels (font_size : int)
• Whether there will be lines behind the characters or not (behind_lines : bool)
• Whether there will be lines in front of the characters or not (front_lines : bool)
• If there will be points in the captcha (points : bool)

Example, binary captcha with eight characters:

  from captcha import Captcha
  binary_captcha = Captcha(chars="01"*4, amount=8)
  binary_captcha.save("binary_captcha.jpg")

Captcha for web use

With the script captcha_img_tag.py we can get a dictionary with the captcha value and its image in a base64 string
for direct insertion to the src attribute of any <img> tag.

  from captcha import generate_captcha
  value, b64_data = generate_captcha().values()

There are no examples for this case since Github does not allow displaying images in base64 for security reasons. But you can try it yourself, just "copy and paste" the string in b64_data into the src of an img tag.