Sky light polarization detection with linear polarizer triplet in light field camera inspired by insect vision.

Stable information of a sky light polarization pattern can be used for navigation with various advantages such as better performance of anti-interference, no "error cumulative effect," and so on. But the existing method of sky light polarization measurement is weak in real-time performance or with a complex system. Inspired by the navigational capability of a Cataglyphis with its compound eyes, we introduce a new approach to acquire the all-sky image under different polarization directions with one camera and without a rotating polarizer, so as to detect the polarization pattern across the full sky in a single snapshot. Our system is based on a handheld light field camera with a wide-angle lens and a triplet linear polarizer placed over its aperture stop. Experimental results agree with the theoretical predictions. Not only real-time detection but simple and costless architecture demonstrates the superiority of the approach proposed in this paper.

[1]  Glenn S. Smith.  The polarization of skylight: An example from nature , 2007 .

[2]  Shree K. Nayar,et al.  Modeling the space of camera response functions , 2004, IEEE Transactions on Pattern Analysis and Machine Intelligence.

[3]  Jinkui Chu,et al.  Integrated polarization-dependent sensor for autonomous navigation , 2015 .

[4]  R. Pfeifer,et al.  A mobile robot employing insect strategies for navigation , 2000, Robotics Auton. Syst..

[5]  G. Horváth,et al.  Human Polarization Sensitivity , 2014 .

[6]  R. Wehner.  Polarization vision--a uniform sensory capacity? , 2001, The Journal of experimental biology.

[7]  Shuai Zhang,et al.  A Bionic Camera-Based Polarization Navigation Sensor , 2014, Sensors.

[8]  T. Labhart,et al.  Detectors for polarized skylight in insects: a survey of ommatidial specializations in the dorsal rim area of the compound eye , 1999, Microscopy research and technique.

[9]  T. Labhart.  Polarization-Sensitive Interneurons in the Optic Lobe of the Desert Ant Cataglyphis bicolor , 2000, Naturwissenschaften.

[10]  M. Berry,et al.  Polarization singularities in the clear sky , 2004 .

[11]  J. L. Gould,et al.  Skylight Polarization patterns and Animal Orientation , 1982 .

[12]  Katsushi Ikeuchi,et al.  Estimating Sunlight Polarization Using a Fish-eye Lens , 2009, IPSJ Trans. Comput. Vis. Appl..

[13]  Martynas Beresna,et al.  Polarization sensitive camera by femtosecond laser nanostructuring. , 2013, Optics letters.

[14]  Dr. habil. Gábor Horváth,et al.  Polarized Light in Animal Vision , 2004, Springer Berlin Heidelberg.

[15]  Marc Pollefeys,et al.  Robust Radiometric Calibration and Vignetting Correction , 2008, IEEE Transactions on Pattern Analysis and Machine Intelligence.

[16]  Huijie Zhao,et al.  Ground-based full-sky imaging polarimeter based on liquid crystal variable retarders. , 2014, Optics express.

[17]  Tao Ma,et al.  Design of a Device for Sky Light Polarization Measurements , 2014, Sensors.

[18]  Albert J. P. Theuwissen,et al.  Biologically inspired autonomous agent navigation using an integrated polarization analyzing CMOS image sensor , 2010 .

[19]  Lu Wang,et al.  A novel autonomous real-time position method based on polarized light and geomagnetic field , 2015, Scientific Reports.

[20]  Ille C. Gebeshuber,et al.  Bio-Inspired Polarized Skylight-Based Navigation Sensors: A Review , 2012, Sensors.

[21]  R. Wehner.  Desert ant navigation: how miniature brains solve complex tasks , 2003, Journal of Comparative Physiology A.

[22]  R. Wehner,et al.  Skylight polarization as perceived by desert ants and measured by video polarimetry , 1999, Journal of Comparative Physiology A.

[23]  R. Wehner.  The Hymenopteran Skylight Compass: Matched Filtering and Parallel Coding , 1989 .

[24]  Kaushik Balakrishnan,et al.  Full-Stokes imaging polarimeter using an array of elliptical polarizer. , 2014, Optics express.

[25]  Lianghai Wu,et al.  Measurements of skylight polarization: a case study in urban region with high-loading aerosol. , 2015, Applied optics.

[26]  Gábor Horváth,et al.  Polarized Light and Polarization Vision in Animal Sciences , 2014, Springer Series in Vision Research.

[27]  A. Barta,et al.  Polarization of the Sky , 2014 .

[28]  H. Wolf.  Odometry and insect navigation , 2011, Journal of Experimental Biology.

[29]  Ravindra Athale,et al.  Flexible multimodal camera using a light field architecture , 2009, 2009 IEEE International Conference on Computational Photography (ICCP).

[30]  G. Horváth,et al.  How the clear-sky angle of polarization pattern continues underneath clouds: full-sky measurements and implications for animal orientation. , 2001, The Journal of experimental biology.

[31]  Nan Zeng,et al.  Linear polarization optimized Stokes polarimeter based on four-quadrant detector. , 2015, Applied optics.

[32]  Mandyam V Srinivasan,et al.  Honeybees as a model for the study of visually guided flight, navigation, and biologically inspired robotics. , 2011, Physiological reviews.

[33]  Gábor Horváth,et al.  How well does the Rayleigh model describe the E-vector distribution of skylight in clear and cloudy conditions? A full-sky polarimetric study. , 2004, Journal of the Optical Society of America. A, Optics, image science, and vision.

[34]  Neelam Gupta,et al.  Acousto-optic tunable filter imaging spectrometer with full Stokes polarimetric capability. , 2007, Applied optics.

[35]  Gábor Horváth,et al.  Polarization transition between sunlit and moonlit skies with possible implications for animal orientation and Viking navigation: anomalous celestial twilight polarization at partial moon. , 2014, Applied optics.

[36]  Huijie Zhao,et al.  Polarization calibration with large apertures in full field of view for a full Stokes imaging polarimeter based on liquid-crystal variable retarders. , 2013, Applied optics.

[37]  Minhua Wu,et al.  The N ovel Method of North - finding Based on the Skylight Polarization , 2013 .