Comparing castAR and SCAPE

On the 14 november the castAR kickstarter project was successfully funded. It is ten years since the paper Stereoscopic Collaboration in Augmented and Projective Environments (SCAPE) was published and 20 years since the first patent on head mounted projected displays was registered.

The technical progress over the last ten years is a game changer for VR and AR. It is quite clear when comparing the glasses used in castAR to the HMPDs from SCAPE.

Since castAR requires no calibration to make the tracking work it will probably be very interesting system for collaborative visualization outside controlled lab environments! The only doubt I have is how this will work in face-to-face collaboration scenarios. Well I pledged and I am very much looking forward get my pair of castAR!

SCAPE (2003)

  • a total weight of 750 grams
  • Projectors in the HMPD prototype achieves 52 degrees FOV.
  • Tracking system using the The HiBall-3000 Wide Area Tracker (cost $25,000 in 2000) which required ceiling mounted ir grid and provided up to 2,000 position and orientation updates per second.

castAR (2013)

  • final weight is expected to be less than 100 grams
  • Projectors with 1280 x 720 resolution per eye
  • 120hz refresh rate per eye
  • 24 bits of color per pixel
  • 65 degree horizontal field of view
  • 93% fill factor
  • Tracking system with 110 degree FOV
  • 120hz update rate
  • 8.3ms response time
  • 6 degrees of freedom
  • Absolute positioning
  • Over 200 unique tracking points
  • 0.07mm accuracy at 1.5m