Estimation of the spectral reflectance of a scene is a critical problem in image processing and computer vision applications. Model-based multispectral imaging, one of the spectral reflectance estimation methods, can effectively reconstruct the full spectrum using a small number of camera shots. However, it is based on iterative optimization and, thus, is computationally too intensive. In this Letter, we modify the iterative optimization problem to a closed-form problem using nonnegative principal component analysis. The proposed method can substantially reduce the computational cost while maintaining the accuracy.
© 2012 Optical Society of America
Original Manuscript: December 27, 2011
Revised Manuscript: February 8, 2012
Manuscript Accepted: March 8, 2012
Published: May 24, 2012
Moon-Hyun Lee, Hanhoon Park, In Ryu, and Jong-Il Park, "Fast model-based multispectral imaging using nonnegative principal component analysis," Opt. Lett. 37, 1937-1939 (2012)