High accuracy image restoration method for seeing through water
Kalyan Kumar Halder, Murat Tahtalı, Sreenatha Gopalarao Anavatti · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2014
This paper presents an algorithm for recovering an image from a sequence of distorted versions of it, where the distortions are caused by a wavy water surface. A robust non-rigid image registration technique is employed to determine the pixel shift maps of all the frames in the sequence against a reference frame. An iterative image dewarping algorithm is applied to correct the geometric distortions of the sequence. A non-local means filter is used to mitigate noise and improve the signal-to-noise ratio (SNR). The performance of our proposed method is compared against the state-of-the-art method. Results show that our proposed method performs significantly better in removing geometric distortions of the underwater images.