A Review of IFM-Free and IFM-Based Methods For Underwater Imaging

Underwater images play a key role in ocean exploration, however typically suffer from severe quality degradation because of light absorption and scattering in water medium. Researchers attempt to capture high-quality underwater pictures for a range of underwater applications. The particles suspended underwater generate unwanted noise and worsens the visibility of dimming pictures. The specialised hardware platforms and cameras may be pricey and power-consuming. Several algorithms are developed for underwater image quality improvement by image enhancement or restoration. To review current development of quality improvement methods for underwater images comprehensive comparisons on IFM-Based underwater image restoration methods and IFM-Free underwater image enhancement methods from both subjective and objective perspectives are used in this paper.. This paper introduces the essential principles of underwater imaging models with image enhancement and image restoration.