Zugg Software :: View topic - Anti-robot code?

Wanderer Joined: 31 Oct 2004 Posts: 94

Hey, could we have like 9 or 10 more examples? Also, could you give what the answer is "supposed" to be for each one? I'm curious to see the variance between submissions. Also, like the others said, this latest one looks like some alien font that means god knows what :P

Apprentice Joined: 18 Feb 2007 Posts: 190

upon seeing that, id just use delete command instead

Wizard Joined: 22 Mar 2007 Posts: 2320

It looks to me like the characters are deliberately distorted, with pixels shifted out of place. In fact, I wonder if the distortion is done dynamically, so that it never appears the same twice. If that is true, I think it would take full-scale OCR to translate them, and even then I wouldn't expect it to work as efficiently as the human eye, and my own human eye can't translate those. If my mud expected me to figure those things out just to keep playing, I'd find another mud.

Sorcerer Joined: 13 Jan 2006 Posts: 715

Agreed Rahab... thats nuts

Beginner Joined: 14 Sep 2008 Posts: 18

Its not easy to edit these, I cant just simply copy and paste those numbers here. What's more, I find it
will show differently depending on the web browser you are using. I could recognize the code 113 I posted before
using firefox, but not with microsoft IE 7.0. So weired... Anyway, thanks for all you guys looking into this.

Posted: Wed Nov 05, 2008 1:21 am

Is it supposed to not be using a fixed-width font or something?

Newbie Joined: 09 Feb 2009 Posts: 5

I am encoutering the some problem here, is it possible for cmud to read and auto answer code like this?

Newbie Joined: 09 Feb 2009 Posts: 5

Apprentice Joined: 06 Apr 2004 Posts: 173

It looks like characters are 9 x 5 (rows x columns) what you can do is encode each number, and then use a "distance" function. the distance function just determines the distance between the encoded number, and the one that is being represented.

Lower distance means higher match. use an array to determine which matches are higher on the list, and then "guess" when two different numbers have the same distance.

Example:
Encoding for number 1:

X
XX
X X
X
X
X
X
X
XXXXX

pattern realized:
X
X
X
X
X
X
X
X
XXXXX

distance = 2 (two characters are different)

a more complex distance function would give you different matching potential.

Apprentice Joined: 06 Apr 2004 Posts: 173

since I didn't use the "code" tag it screwed up my spacing, but you get the idea.

Apprentice Joined: 06 Apr 2004 Posts: 173

it also looks like the columns are either just a simple right shift or left shift. in that case your distance function should average or weight the right shifted, and left shifted version of each encoding.