Time-tagged Photons

Cheri's Flagstone Patio

MPEG movie, 2 MB

July 2002. Movie's made with the Harbortronics Digisnap timelapse controller, plugged into an old Olympus camera; this was the first long sequence I tried. I started taking pictures at 15-second intervals, but changed to 30-second intervals partway through (where the image shifts -- note that the shadows speeed up after this!) I used ImageMagick to create the mpeg from all the jpeg's, using its standard settings. Due to memory limitations, I couldn't get the movie made using all the images, so I had to throw out every other one, making it effectively 1-minute intervals. There are 250 frames in the final movie, spanning about 4 hours. The compression artifacts are horrible; they're introduced somewhere in the JPEG->MPEG conversion process. Presumably I'll learn how to clear those up and also run the movie a little slower.

NB: On linux, I use the MPEGTV MPEG player. Mostly works, though it crashes at odd times if you step backwards through the movie.

For two sources of inspiration, see the pages of John Spencer and Andrew Kinsman.


Henry Throop, Southwest Research Institute throop (at) boulder swri edu

Last modified 21-Jul-2002