Polarimetric target detection in the presence of spatially fluctuating Mueller matrices.
ABSTRACT In polarimetric imaging systems, the main source of perturbations may not be detection noise but fluctuations of the Mueller matrices in the scene. In this case, we propose a method for determining the illumination and analysis polarization states that allow reaching the highest target detection performance. We show with simulations and real-world images that, in practical applications, the statistics of Mueller matrix fluctuations have to be taken into account to optimize polarimetric imagery.
Article: Polarization imaging.[show abstract] [hide abstract]
ABSTRACT: Although several attempts have been made in the past to use the partially polarized nature of optical fields in constructing images, the technique is not widely known or used. This paper reviews the principles of single-parameter polarization imaging and introduces the concept of multiparameter Stokes vector imaging. The Stokes vector image construction is discussed in the context of a recently introduced model of the human visual system perception space. It is shown that this perception space model allows one to take advantage of more of the information contained in the optical field to create an intelligible color display. The perception space model is also used to define a quantitative visual discrimination threshold applicable to multiparameter image construction and display.Applied Optics 05/1981; 20(9):1537-44. · 1.69 Impact Factor
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ABSTRACT: Polarization-difference imaging (PDI) was recently presented by us as a method of imaging through scattering media [Opt. Lett. 20, 608 (1995)]. Here, PDI is compared with conventional, polarizationblind imaging systems under a variety of conditions not previously studied. Through visual and numerical comparison of polarization-difference and polarization-sum images of metallic targets suspended in scattering media, target features initially visible in both types of images are shown to disappear in polarization-sum images as the scatterer concentration is increased, whereas these features remain visible in polarization-difference images. Target features producing an observed degree of linear polarization of less than 1% are visible in polarization-difference images. The ability of PDI to suppress partially polarized background variations selectively is demonstrated, and discrimination of target features on the basis of polarization information is discussed. Our results show that, when compared with conventional imaging, PDI yields a factor of 2-3 increase in the distance at which certain target features can be detected.Applied Optics 04/1996; 35(11):1855-70. · 1.69 Impact Factor
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ABSTRACT: We consider active polarimetric imaging systems that illuminate a scene with an incident polarization state and project the backscattered light on another polarization state in order to produce a scalar intensity image. We present and analyze a method for determining the configuration of illumination and analysis polarization states that maximizes the observed contrast between a target and the background when the scene is partially depolarizing and in the presence of additive Gaussian detection noise.Optics Letters 06/2009; 34(9):1471-3. · 3.39 Impact Factor