Responses to the 1/21 Exit Ticket

  • Is the polarization camera relative? In other words, does polarized light oriented in a given direction compared to the camera always the same, or is it somehow an absolute value (something pointing north will always look the same to the camera no matter which direction the camera is oriented)? Interestingly, the answer is a little bit of both. The camera reports the orientation of polarized light relative to the camera. However, the daytime sky has regularities in the polarimetric orientation of natural daylight (these change with the latitude and time of day, but form a predictable reference frame that can be used as an alternative to GPS); see this, this, this, and this.
  • Is there any way to make a virtual reconstruction of objects in movement with Agisoft that does not involve a motion tracking system (let’s say a setting of four cameras oriented to the moving object)? Yes, the main way is to use arrays of synchronized cameras (similar to a bullet time capture rig). It may also be possible to do something clever with phase-locked stroboscopy, similar to this (cheap) or this (expensive).
  • Is there more accurate way to shoot around an object? Creating an analog grid or some sort of mechanical way to adjust and orbit an object? You could use a robot arm or a mechanized rail.


To do for Tuesday 1/28

  • To read: Photography and Observation (6700 words — about 30 mins.)
  • To do: Respond to the above reading in a blog post, labeled with the category Reading02. Please discuss how the medium of capture can influence a typology. In contemporary captures do you consider the medium objective? Predictable? And thus scientifically reliable? Or not, why?
  • To do: Prepare to discuss 3 ideas for your typology project. Consider these ideas casual concepts, but come ready to discuss them with your peers.

Exit Ticket