Alex Beutel's Blog

Entries Tagged as 'Math'

Interactive Quadtrees and Well-Separated Pairs Decomposition

January 16th, 2012 · 2 Comments

While doing computational geometry research with Professor Pankaj K. Agarwal and Thomas Mølhave at Duke, we looked at using quadtrees and the well-separated pairs decomposition (WSPD) for one of our algorithms. As I was reading about the algorithms and geometric concepts, I decided to code them in Javascript and HTML5’s canvas to get more intuition […]

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Tags: Duke · Javascript · Math · Mathematics · Programming

Image Aliasing of Plane Propellers in Photos and Video

July 23rd, 2009 · 13 Comments

Recently, while flying between Durham and New York, I decided to take a picture of the propeller during take off.  I don’t know what prompted to me to do this, but when I pointed my iPhone camera at the propeller out my window I noticed very odd pattens.  I took multiple pictures throughout the flight […]

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Tags: iPhone · Math · Miscellanious