Performance of eliminating sun glints reflected off wave surface by polarization filtering under influence of waves

Abstract For the purpose of investigating influence of waves on the performance of eliminating glints reflected off wavy sea surface by polarization filtering, we viewed glints twinkled in glitter path using a simultaneous multi-channel polarization camera. By analyzing the recorded data, it is found that the waving of water surface do not make unlimited influence on polarization elimination performance. Then a semi-quantitative analysis method is introduced. Combing with simulation results, it is concluded that the influence level of waves on polarization elimination performance is determined by observation geometry primarily and then limited by receiver's field of view. When observation geometry is approach to the Brewster condition closer, polarization filtering will has batter performance which is represented by more decrease of intensity of glints and lower influence level of waves on reducing intensity of glints.

[1]  G. Plass,et al.  Sunlight glitter on a wind-ruffled sea: further studies. , 1979, Applied optics.

[2]  Josué Álvarez-Borrego,et al.  Theoretical statistical relationships between the intensities of an image of the sea surface and its slopes: a result comparison of rect and Gaussian glitter functions , 2014 .

[3]  Alessandro Rossi,et al.  Sun-glint false alarm mitigation in a maritime scenario , 2014, Security and Defence.

[4]  K Stamnes,et al.  Time-resolved polarimetry over water waves: relating glints and surface statistics. , 2008, Applied Optics.

[5]  Egbert S. Tse,et al.  Coherent whitecap and glitter simulation model , 1990, Defense, Security, and Sensing.

[6]  Huijie Zhao,et al.  The polarization patterns of skylight reflected off wave water surface. , 2013, Optics express.

[7]  Gábor Horváth,et al.  Measurement of the reflection–polarization pattern of the flat water surface under a clear sky at sunset , 2001 .

[8]  Kathleen M. Littfin,et al.  Infrared radiance of the wind-ruffled sea , 1999 .

[9]  David McKee,et al.  Brewster-angle measurements of sea-surface reflectance using a high resolution spectroradiometer , 2002 .

[10]  David K. Lynch,et al.  Glitter and glints on water. , 2011, Applied optics.

[11]  Oliver Zielinski,et al.  Methods in reducing surface reflected glint for shipborne above-water remote sensing , 2013 .

[12]  W. Munk,et al.  Measurement of the Roughness of the Sea Surface from Photographs of the Sun’s Glitter , 1954 .

[13]  C. Cox Slopes of the sea surface deduced from photographs of sun glitter , 1956 .

[14]  Horváth,et al.  Polarization pattern of freshwater habitats recorded by video polarimetry in red, green and blue spectral ranges and its relevance for water detection by aquatic insects , 1997, The Journal of experimental biology.

[15]  Samantha J. Lavender,et al.  Sun Glint Correction of High and Low Spatial Resolution Images of Aquatic Scenes: a Review of Methods for Visible and Near-Infrared Wavelengths , 2009, Remote. Sens..