自适应色彩补偿和多尺度融合的水下图像增强  

Adaptive color compensation and multi-scale fusion for underwater image enhancement

作　　者：柳翠寅 陈元帅 敬腾匀 王锋[2] LIU Cuiyin*;CHEN Yuanshuai;JING Tengyun;WANG Feng(School of Information Engineering and Automation,Kunming University of Science and Technology,Kunming 650500,China;School of Physics and Material Sciences,Guangzhou University,Guangzhou 510006,China)

机构地区：[1]昆明理工大学信息工程与自动化学院,云南昆明650500 [2]广州大学物理与材料科学学院,广东广州510006

出　　处：《光学精密工程》2025年第5期802-817,共16页Optics and Precision Engineering

基　　金：国家自然科学基金资助项目(No.12373097,No.11773012)。

摘　　要：为了改善水下图像存在的色彩失真,光照不均,对比度低和细节模糊等问题,提出了一种自适应色彩补偿和多尺度融合的水下图像增强算法。使用自适应色彩补偿和白光平衡算法对图像的颜色进行校正,对颜色校正后的图像进行自适应伽马校正使其光照均匀。然后,对光照均匀的图像分别使用自适应瑞利直方图拉伸和自适应非锐化掩膜处理,得到对比度提高的图像和细节增强的图像。为了进一步改善水下图像的质量,对对比度提高图像和细节增强的图像进行非下采样轮廓波融合。实验结果表明:该算法可以对水下图像的颜色进行校正,使图像光照均匀,提高图像的对比度和清晰度,图像的评价指标PSNR,SSIM,IE,UCIQE的平均值较原始图像分别提高了43.52%,58.65%,12.5%,32.13%,水下图像的质量得到了显著提升。To address the challenges of color distortion,uneven lighting,low contrast,and blurred details in underwater images,an adaptive color compensation and multi-scale fusion enhancement algorithm is proposed.Initially,adaptive color compensation and white light balance algorithms are employed to correct the image colors.Subsequently,adaptive gamma correction is applied to the color-corrected images to achieve uniform illumination.Thereafter,the uniformly lit images undergo processing through adaptive Rayleigh histogram stretching and adaptive unsharp masking to enhance contrast and detail.Finally,nondownsampling contour wave fusion is utilized to further refine the quality of the images with improved contrast and enhanced details.Experimental results demonstrate that the proposed algorithm effectively corrects the colors of underwater images and significantly enhances their contrast and clarity,with average evaluation metrics PSNR,SSIM,IE,and UCIQE showing increases of 43.52%,58.65%,12.5%,and 32.13%,respectively,compared to the original images.This algorithm is shown to substantially improve underwater image quality.

关 键 词：图像增强 图像融合 色彩补偿 白平衡 伽马校正 瑞利分布 非锐化掩膜 非下采样轮廓波 

分 类 号：TP394.1[自动化与计算机技术—计算机应用技术] TH691.9[自动化与计算机技术—计算机科学与技术]