We advocate the use of quickly-adjustable, computer-controlled color spectra in photography, lighting and displays. We present an optical relay system that allows mechanical or electronic color spectrum control and use it to modify a conventional camera and projector. We use a diffraction grating to disperse the rays into different colors, and introduce a mask (or LCD/DMD) in the optical path to modulate the spectrum. We analyze the trade-offs and limitations of this design, and demonstrate its use in a camera, projector and light source. We propose applications such as adaptive color primaries, metamer detection, scene contrast enhancement, photographing fluorescent objects, and high dynamic range photography using spectrum modulation.
Paper
The paper as it appears in the proceedings of Eurographics 2008: hi-res pdf (~13MB); low-res pdf (~1.1MB).
Presentation
Powerpoint file (~13MB) for the presentation given at Eurographics 2008.
BibTeX Entry
@Article{mohan_08_agile,
author = {Ankit Mohan and Ramesh Raskar and Jack Tumblin},
title = {Agile Spectrum Imaging: Programmable Wavelength Modulation for Cameras and Projectors},
journal = {Computer Graphics Forum},
volume = {27},
number = {2},
year = {2008},
pages = {709--717}
}
