Title :
Simple algorithm for correction of geometrically warped underwater images
Author :
Halder, Kalyan Kumar ; Tahtali, Murat ; Anavatti, Sreenatha G.
Author_Institution :
Sch. of Eng. & Inf. Technol., Univ. of New South Wales, Canberra, ACT, Australia
Abstract :
A new algorithm for the turbulence degraded frames of an underwater object or scene to produce images with superior quality and higher resolution is presented. This approach is based on computing the centroid image of the sequence through an iterative scheme. A robust and fast optical flow technique is employed for pixel registration of all the frames against a reference frame and the pixel shift maps are determined. Using these shift maps, each distorted frame is restored through an image dewarping technique. A performance comparison between the proposed restoration approach and state-of-the-art is presented in terms of restoration time and accuracy. The effectiveness of the approach is demonstrated on both synthetic and real-world underwater videos.
Keywords :
image registration; image resolution; image sequences; iterative methods; turbulence; centroid image computing; geometrically warped underwater image correction; image dewarping technique; image resolution; image sequence; iterative scheme; optical flow technique; pixel registration; shift maps; superior quality; turbulence degraded frames; underwater object; underwater scene;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2014.3142