Is there a software that finds an equation of a function?

[SpanInq]

Like in the title, is there a software that allows you to draw a curve or even better, input a picture and select a curve on it, in order to get the equation of that curve as a function? Would be glad for help, I need it for my mathematics exploration on minimizing surface area of a vase-like object.

 

[jedishrfu]

Some time ago, Cornell University researchers developed a program to do something what you're looking for:

http://www.wired.com/2009/04/Newtonai/

 

[SpanInq]

While the article is quite interesting one, it doesn't really say the name of that particular software...and I honestly doubt it could be downloaded just like that. Thank you for your help though, it is appreciated.