Research On Registration And Fusion Algorithm Of Simultaneous Polarization Imaging System

In recent years,polarizing imaging has been widely applied in all walks of life,especially in the military field,because of its absolute advantage of"penetrating clouds and fog".For the Navy,polarization imaging technology can be well applied to heavy fog at sea.For the army,polarization imaging can identify combat tools,such as tanks,armored vehicles,etc.For the air force,polarization imaging technology helps to identify flying targets in the air.This paper studies the technology of simultaneous polarization imaging,its greatest advantage is that it can get polarizing images with different polarization angles at the same time.In this paper,we get 0,45,90 and 135 degrees polarization angle images,so that polarization information will be more abundant.When the position of polarizing camera is adjusted by manpower,there will still be unavoidable deviation,so the registration of polarization images is particularly important.In this paper,the improved SURF algorithm is used to register the polarization angle image automatically,which can also be well applied to the images obtained under low illumination conditions.The fused source images are DOP and S₀,which is one of the Stokes parameters,the final result is more prominent and richer than the ordinary intensity image.The image fusion algorithm used in this paper are:the fusion based on DT-CWT,the fusion based on Curvelet transform and the fusion based on the Contourlet transform,and the fusion results of the 3kinds of fusion algorithms are compared and analyzed,the evaluation index includes the entropy,average gradient,spatial frequency and joint entropy.