期刊名称：International Journal of Innovative Research in Computer and Communication Engineering
印刷版ISSN：2320-9798
电子版ISSN：2320-9801
出版年度：2015
卷号：3
期号：3
DOI：10.15680/ijircce.2015.0303091
出版社：S&S Publications
摘要：Most important source of distortion in underwater environs are Haze and Hue alteration. Haze isproduced because of the effect of light scattering by particle present in the underwater environment. Hue alterationsoccur when light enter deeper in underwater. These two issues make the picture look darker and low luminosity.Hazeremoval and Hue altered enhancement is important for this kind of low visibility and low contrast underwater images.The existing Dark Channel Prior method effectively removes Haze but color change is not processed. In this paperunderwater image enhancement is carried out in two steps. In the first step Haze in the underwater image is removedusing dark channel prior. In the second step Hue alterations handled by wavelength compensation. Once depth map isderived, luminance of foreground and background inside the image can be separated and compared. To regulate theHue alteration wavelength can be compensated using average RGB channels in the image. After computing the scalevalue of each RGB component, wavelength is compensated together with the average RGB and scale value of eachchannel in the image. Performance of the proposed method of wavelength compensated image is evaluated using thePSNR, Focus Measurement, Contrast Improvement Index, and Feature Similarity Index. Performance measurement ofthe wavelength compensation produces better enhancement results than existing method.
