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Methods and Systems for Suppressing Atmospheric Turbulence in Images

Research output: PatentScientific

Details

Original languageEnglish
Patent numberUS2015254813
IPCH04N 5/ 217 A I
Priority date22/05/15
Publication statusPublished - 10 Sep 2015
Publication typeH1 Granted patent

Abstract

Various techniques are disclosed to suppress distortion in images (e.g., video or still images), such as distortion caused by atmospheric turbulence. For example, similar image blocks from a sequence of images may be identified and tracked along motion trajectories to construct spatiotemporal volumes. The motion trajectories are smoothed to estimate the true positions of the image blocks without random displacements/shifts due to the distortion, and the smoothed trajectories are used to aggregate the image blocks in their new estimated positions to reconstruct the sequence of images with the random displacements/shifts suppressed. Blurring that may remain within each image block of the spatiotemporal volumes may be suppressed by modifying the spatiotemporal volumes in a collaborative fashion. For example, a decorrelating transform may be applied to the spatiotemporal volumes to suppress the blurring in a transform domain, such as by alpha-rooting or other suitable operations on the coefficients of the spectral volumes.

Publication forum classification

Field of science, Statistics Finland