Slashdot Mirror


Next-Generation CAPTCHA Exploits the Semantic Gap

captcha_fun writes "Researchers at Penn State have developed a patent-pending image-based CAPTCHA technology for next-generation computer authentication. A user is asked to pass two tests: (1) click the geometric center of an image within a composite image, and (2) annotate an image using a word selected from a list. These images shown to the users have fake colors, textures, and edges, based on a sequence of randomly-generated parameters. Computer vision and recognition algorithms, such as alipr, rely on original colors, textures, and shapes in order to interpret the semantic content of an image. Because of the endowed power of imagination, even without the correct color, texture, and shape information, humans can still pass the tests with ease. Until computers can 'imagine' what is missing from an image, robotic programs will be unable to pass these tests. The system is called IMAGINATION and you can try it out." This sounds promising given how broken current CAPTCHA technology is.

13 of 327 comments (clear)

  1. curses... by Anonymous Coward · · Score: 4, Funny

    It's already spotted that I am a computer and it won't even load.

  2. Lyrical Response Mechanism by FurtiveGlancer · · Score: 5, Funny

    Why don't we take a note from TV and have the user sing the missing lyrics of a classic hit. Even if they don't pass, it will make for much more fun around the computer, especially at the office.

    --
    Invenio via vel creo
    1. Re:Lyrical Response Mechanism by CSMatt · · Score: 3, Funny

      Until the user gets subpoenaed by copyright holders.

      Then it will be hilarious.

    2. Re:Lyrical Response Mechanism by Daimanta · · Score: 5, Funny

      I'll start. Finish this:

      "Never gonna give you up"...

      --
      Knowledge is power. Knowledge shared is power lost.
  3. Re:worthless by Mipoti+Gusundar · · Score: 5, Funny

    you can just hire 50 chinese kids for 3 cents per day
    If is really being true that they can be cutting us under by fifety percents then fine hai-tech industry of my dear INDIA is doomed. Ah well, nice while was lasting. Perhaps my medical degree is being useful after all!
    --
    Will code for new sig.
  4. 20 minutes, test not yet passed.. by PIBM · · Score: 2, Funny

    They might have a good captcha but it's already broken: they are unable to serve it as fast as required, which prevents legitimate users from accessing a real server content... No user on any site would wait so long just to pass a captcha test.

  5. Re:Twofo Ghey Niggers by CSMatt · · Score: 4, Funny

    This just reaffirms the article's conviction that the CAPTCHA is broken.

  6. Re:Blind people? by Bastard+of+Subhumani · · Score: 3, Funny

    The difference is that the web consists mainly of textual information that blind people can use.
    Only a blind person could be unaware that 99.99% of the intarwebs are composed of pr0n.
    --
    Only three things are certain; death, taxes, and apocryphal quotations - Ben Franklin.
  7. Re:Blind people? by $rtbl_this · · Score: 5, Funny

    Oh, they're aware. How do you think most of them got to be blind?

    --
    "Are you being weird, or sarcastic?" said Emma. I said I didn't know because I get the two feelings mixed up.
  8. Regarding your sig by spun · · Score: 3, Funny

    I can already see how this is going to go.

    "You stole my sig!"
    "No I didn't."
    "Yes you did, it's exactly the same as mine!"
    "No it isn't."
    "Yes it is!"
    "No it isn't. Look, mine is in two lines."
    "That hardly makes a difference."
    "Yes it does!"
    "No it doesn't."

    --
    - None can love freedom heartily, but good men; the rest love not freedom, but license. -- John Milton
  9. Here's a reference implementation by gr8dude · · Score: 3, Funny

    Which of the following would you most prefer?
    • A: a puppy,
    • B: a pretty flower from your sweety, or
    • C: a large properly formatted data file?
  10. Re:Blind people? by Anonymous Coward · · Score: 1, Funny

    Sir, i take my hat off. Bravo!

  11. advancing AI by Thuktun · · Score: 2, Funny

    Aha, the next AI micro-X-Prize has been announced!