A hybrid DCT-DHE approach for enhancement of low contrast underwater images

In this research, presented an underwater image enhancement (IE) making use of discrete cosine transform (DCT) with dynamic histogram equalization (DHE) algorithm. The main issue in IE underwater images are blur impact, low-contrast, nonuniform illumination, because of turbulence in flow of water. In underwater images, it impacts the scattering of light from a few particles of various sizes, low force caused by low visibility conditions, suspended development particles. In this approach, firstly take RGB to YCBCR format for further processing. The new result is applied on peak signal Noise Ratio (PSNR) and Entropy. This calculation is contrasted and three calculations, to be specific DCP[1], brightness bi histogram equalization(BBHE), Contrast Enhance method. The proposed algorithm decribes that better performance as compared to other algorithms.