In active polarization imaging, one frequently needs to be insensitive to noninformative spatial intensity fluctuations. We investigate a way of solving this issue with general state contrast (GSC) imaging. It consists in acquiring two scalar polarimetric images with optimized illumination and analysis polarization states, then forming a ratio. We propose a method for maximizing the discrimination ability between a target and a background in GSC images by determining the optimal illumination and analysis states. A further advantage of this approach is to provide an objective way of quantifying the performance improvement obtained by increasing the number of degrees of freedom of a GSC imager. The efficiency of this approach is demonstrated on simulated and real-world images.
© 2012 Optical Society of America
Original Manuscript: December 13, 2011
Revised Manuscript: January 30, 2012
Manuscript Accepted: February 1, 2012
Published: May 17, 2012
Guillaume Anna, Françcois Goudail, and Daniel Dolfi, "General state contrast imaging: an optimized polarimetric imaging modality insensitive to spatial intensity fluctuations," J. Opt. Soc. Am. A 29, 892-900 (2012)