An Adaptive Image Registration Technique to Remove Atmospheric Turbulence

Akshay Patel, Dippal Israni, Nerella Arun Mani Kumar, Chintan Bhatt

Abstract


Turbulence/Heat Scintillations is the change that arises in the refraction index of air with the temperature. The distortion created by the atmospheric turbulence is proportional to the distance between object and camera. In last few years, several approaches have been proposed to estimate and eliminate geometric distortion and blur. In this paper, a novel technique is proposed that improves the visual quality of video sequences affected by atmospheric turbulence. The proposed method is based on adaptive control grid interpolation (CGI). CGI approximates accurate motion vectors to generate a geometrically correct frame using certain reference frames. For high scintillation sequences, CGI doesn’t mitigate scintillations completely. The new methodology is proposed with updated trajectory estimation. The proposed method can effectively reduce the influence even for high atmospheric turbulence. Experimental results also prove that proposed approach is time efficient compared to traditional CGI.

Keywords


Heat scintillation; atmospheric turbulence; motion vector calculation; registration; blind iterations; optical flow

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DOI: 10.19139/soic.v7i2.432

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