Under water image enhancement technique

Underwater image enhancement and reconstruction of the underwater image is having a high priority from past few years and is also considered to be a challenging task. These underwater images can't be seen clearly with a human eye. When the digital image capturing systems are too used to capture pictures at great depths underwater, fail to take pictures with all the significant detail and such equipment is also very expensive. Thus, with the algorithms that are related to the image processing it is possible to reconstruct and improve the quality of image without using any costly image acquisition systems. We, therefore compare four different approaches for the enhancement and reconstruction of underwater images. Firstly, we use Adaptive Histogram Equalization (AHE). Secondly, we perform Gamma Correction on the image. Brightness preserving Bi-Histogram Equalization (BBHE) is the third approach taken. Lastly, we use the Contrast Limited Adaptive Histogram equalization (CLAHE).