I am creating a *painting application* in Actionscript (although my question is not Actionscript related). The basic idea is to start painting when the mouse is pressed and tracking the mouse movements. What I want to achieve is:

1. reduce mouse "noise" and
2. create more smoother looking lines.

Right now, (**1**) is problematic because I get thousands of mouse movements within a few seconds. Due to (**1**) the line can look jaggy.
What current idea: when the user finishes drawing the line, I store all movements in an array and reduce them (median threshold) and then use a spline algorithm to recreate a line. 

Any better approaches?