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Hack Forums Tech Coding Software Development › [.NET] FloCAPTCHA (Graphical CAPTCHA System)

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FloCAPTCHA (Graphical CAPTCHA System)
idb.
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May 1, 2011 03:03 PM
You should add some rotation to the letters as well. When you leave them all in the same direction it makes it a lot easier to defeat with OCR. Just a suggestion.
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May 1, 2011 03:22 PM (This post was last modified: May 1, 2011 03:23 PM by tflo.)
(May 1, 2011 03:00 PM)bobolobo Wrote:  You could after making the random shapes behind a letter randomize the letters colour. Then compare it to the colour of the shape. If its too close then re-randomize the colour of the letter :)..

It's not that simple (:D).

(May 1, 2011 03:03 PM)idb. Wrote:  You should add some rotation to the letters as well. When you leave them all in the same direction it makes it a lot easier to defeat with OCR. Just a suggestion.

Thanks, updated.

[Image: 40eb9fa2f80c54eaf9df621a11fa65c0.png]

Notice: Increased CAPCHA canvas size by one half to allow rotation to work properly.
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May 1, 2011 03:25 PM
What about adding some style to them like: Bold, italic, and underlined?
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May 1, 2011 03:30 PM
(May 1, 2011 03:25 PM)bobolobo Wrote:  What about adding some style to them like: Bold, italic, and underlined?

Good idea, added.

[Image: 7dccd9b905bd0ca1b3c54d48f79c45f9.png]
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May 1, 2011 03:36 PM
You should sharp the letters so whole CAPTCHA will look more HQ.
Cody8295
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May 1, 2011 04:08 PM
(May 1, 2011 03:30 PM)tflo Wrote:  Good idea, added.

[Image: 7dccd9b905bd0ca1b3c54d48f79c45f9.png]

you should take a list of dictionary words, choose a random one, randomize the characters, and insert some random numbers letters.
Doctor07
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May 1, 2011 05:22 PM
Every single time i check back, its been updated.
Great work here vanq.
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May 1, 2011 07:14 PM
(May 1, 2011 05:22 PM)Doctor07 Wrote:  Every single time i check back, its been updated.
Great work here vanq.

Thanks, back just got home, taking more suggestions now.

@Cody - I don't follow what your saying.
@CATMAN - I am stretching the image in the picturebox, so the quality is reduced a little.
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May 1, 2011 07:52 PM
If you ever feel like making something a little more secure, you could always make the Capcha to be in an encrypted format, like Base-64, Etc. Then you have to decrypt the Capcha. This is just a suggestion. Might be cool for a different project.
vpserver
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May 2, 2011 12:32 AM
make it two words like recaptcha. Then each generation of captcha
make the 1st (or 2nd) words difficult (like having period or comma)
and only the other counterpart word is the only valid captcha. (This is
what recaptcha i think works)

Just an idea.
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May 2, 2011 05:31 PM
(May 2, 2011 12:32 AM)vpserver Wrote:  make it two words like recaptcha. Then each generation of captcha
make the 1st (or 2nd) words difficult (like having period or comma)
and only the other counterpart word is the only valid captcha. (This is
what recaptcha i think works)

Just an idea.

Then I would have to use a word database or rely on a network. I'll stick with random string generation.
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May 3, 2011 01:41 AM
how should i import System.Drawing.Drawing2D
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May 18, 2011 09:45 PM
(May 3, 2011 01:41 AM)yahya123 Wrote:  how should i import System.Drawing.Drawing2D

Just create a new class and paste it in, sorry for a late reply.
Stenography
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May 18, 2011 11:20 PM
oh thank you, i loved it <3

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Jun 9, 2011 05:56 PM (This post was last modified: Jun 9, 2011 05:57 PM by tflo.)
(May 18, 2011 11:20 PM)Stenography Wrote:  oh thank you, i loved it <3

No problem! Glad you liked it!



Updated the main program, added three output formats:
- Random (the previous, standard, format).
- Pattern (uses the generation process of my Formatted String Generator class).
- Exact (input a literal string).
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