Bee Motion I

I swarm of bees decided to honor my home with a surprise move-in.  Before I had them removed (gently and professionally), I grabbed some video (about an hour total) of their flying motion.

I can then compute the differences between images and then sum those differences into a 'long exposure'.  If I set a threshold correctly in my code, the motion of the bees just pops out.

Bees move very fast so this is a short 2 second exposure running at 30 Hz.  So this is the sum of a the differences between 60 contiguous video frames, thresholded so only the largest motions (the bees) shows up:

They are true artists and flying machines, or they really have no idea what they're doing.

Here's another 2 second sample: