An Improved Approach for Underwater Image Enhancement Through Color Correction, Contrast Synthesis and Dehazing

Md. Sajedul Islam, Md. Ali Hossain, Dr. Md. Al Mamun
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Abstract

This paper proposed an improved approach to enhance the quality of underwater images without the aid of any specialized hardware. The proposed method consists of three steps including color correction, contrast synthesis and dehazing. The color correction removes the color cast problem, contrast synthesis removes under-exposure problem and dehazing removes the fuzz problem. In the proposed method, color correction, contrast synthesis and dehazing are developed based on a statistical method, Retinex-model and utilizing the dark channel prior information respectively. After removing these three difficulties the quality of the enhanced underwater images is compared with the baseline approaches based on the value of chroma, contrast and saturation. The proposed method obtains Underwater Color Image Quality Evaluation (UCIQE)value 0.66574 which is the best among the methods compared.
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一种基于色彩校正、对比度合成和去雾的水下图像增强方法
本文提出了一种不借助任何专用硬件来提高水下图像质量的改进方法。该方法包括色彩校正、对比度合成和去雾三个步骤。色彩校正消除了偏色问题,对比合成消除了曝光不足问题,去雾消除了模糊问题。在该方法中,分别基于统计方法、retex模型和暗通道先验信息进行色彩校正、对比度合成和去雾。在消除这三个困难后,根据色度、对比度和饱和度的值,将增强后的水下图像质量与基线方法进行比较。该方法得到的水下彩色图像质量评价(UCIQE)值为0.66574,是几种方法中比较好的。
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