Ramesh Raskar is in the news with the NETRA system, which uses coded patterns on a cell phone display to project patterns for personal ophthalmology.
25 June 2010
28 April 2010
The principles and methods of geometrical optics
Dan Marks points out an interesting book, The principles and methods of geometrical optics, especially as applied to the theory of optical instruments, by James Southall of Alabama Tech, published in 1910 has been placed online by Google.
25 March 2010
Gigapixel image display
Tor-Magne Stien Hagen, Daniel Stødle and Otto J. Anshus of the University of Tromsø in Norway have posted a video of interactive exploration of a 13 gigapixel image using a multitouch 22 megapixel wall.
30 April 2009
U-C-L-A!
I presented the Electrical Engineering Department seminar at UCLA this week, thanks to Aydogan Ozcan for hosting my visit.
It was particularly interesting to be see the “serial time-encoded amplified microscopy” (STEAM) system in Bahram Jalali’s lab. Steam transforms a short laser pulse into a 2D illumination with unique spectral components at each spatial location. The signal reflected off an object is reserialized and spectrally dispersed such that a serial time signal captures the 2D image. Single pulse capture enables subnanosecond frame periods. Steam is reported in the April 30 issue of Nature, thanks to Keisuke Goda for showing it to me. I imagine, of course, that all sorts of generalized and compressive coding and sampling strategies could be applied within the basic STEAM strategy.
Professor Ozcan’s work on computational holography is also quite itneresting, he is working on lensless cellular assay analysis. Ultimately, one may expect holographic, ultra-fast and OCT systems to merge in a variety of computational imaging systems.
