基于改进多尺度Retinex的双波散射激光图像增强方法  

Double wave scattering laser image enhancement method based on improved multi-scale Retinex

作　　者：陈美玲[1] 石瑶[1] 周珣 CHEN Meiling;SHI Yao;ZHOU Xun(Nanjing Tech University Pujiang Institute,Nanjing 210000,China)

机构地区：[1]南京工业大学浦江学院,南京210000

出　　处：《激光杂志》2024年第11期113-117,共5页Laser Journal

基　　金：国家重点研发计划(No.2020YFB1711201)。

摘　　要：当激光束遇到不同介质或界面时,会发生散射现象,使得激光能量分布变得不均匀,导致双波散射激光图像边缘模糊、细节丢失,因此,提出基于改进多尺度Retinex的双波散射激光图像增强方法。对双波散射激光图像进行降采样处理,获取估计模糊核参数。根据模糊核开展光点参数更新,估计原始清晰图像,实现双波散射激光图像去模糊处理。在待增强的双波散射激光图像上展开全局增强,提高双波散射激光图像全局对比度。将多尺度Retinex算法中的高斯滤波器替换为引导滤波,从而完成多尺度Retinex算法的改进。采用改进多尺度Retinex算法对双波散射激光图像进行滤波增强处理。最后,采用DWT图像融合算法融合全局对比度增强结果与滤波增强结果,完成双波散射激光图像增强。实验结果证明,所提方法具有较好的双波散射激光图像增强效果,可以有效改善图像视觉质量。When the laser beam encounters different media or interfaces,scattering phenomena occur,making the laser energy distribution uneven,resulting in blurred edges and loss of details in the dual wave scattering laser image.Therefore,an improved multi-scale Retinex based dual wave scattering laser image enhancement method is proposed.Perform downsampling on dual wave scattering laser images to obtain estimated blur kernel parameters.Update the light point parameters based on the fuzzy kernel,estimate the original clear image,and achieve deblurring processing of dual wave scattering laser images.Expand global enhancement on the dual wave scattering laser image to enhance the global contrast of the dual wave scattering laser image.Replace the Gaussian filter in the multi-scale Retinex algorithm with a guided filter to improve the multi-scale Retinex algorithm.Using an improved multi-scale Retinex algorithm to filter and enhance dual wave scattering laser images.Finally,the DWT image fusion algorithm is used to fuse the global contrast enhancement results with the filtering enhancement results,completing the enhancement of dual wave scattering laser images.The experimental results demonstrate that the proposed method has a good dual wave scattering laser image enhancement effect and can effectively improve the visual quality of the image.

关 键 词：改进多尺度Retinex 双波散射 激光图像增强 DWT图像融合算法 

分 类 号：TN249[电子电信—物理电子学]