改进暗通道原理下视觉图像光晕消除算法  

Visual image halo eliminating algorithm based on improved principle of dark channel

作　　者：任晓楠 李广 REN Xiaonan;LI Guang(North University of China,Taiyuan 030051,China)

机构地区：[1]中北大学,山西太原030051

出　　处：《现代电子技术》2025年第1期60-64,共5页Modern Electronics Technique

摘　　要：在光晕区域附近进行光晕消除操作可能会降低图像的对比度、清晰度和细节。因此,需要开发有效的方法来恢复和增强光晕消除后的图像细节,以确保整体图像质量的提高,为此设计一种改进暗通道原理下视觉图像光晕消除算法。建立大气散射模型深度分析光晕产生条件,根据图像中的像素强度值计算成像环境中的透射率,按照大气光照的散射系数建立光照条件研究模型。在较高的像素颜色通道条件下,根据图像中高亮度和强反射部分搭建无光晕图像亮通道定义,聚类图像亮通道特征,利用快速双边滤波器细化透射率,建立光晕图像的成像模型。在改进暗通道原理的过程中通过调整多个计算参数,包括改变权重函数,设置光晕消除的恢复指令,完成对视觉图像的光晕消除处理。经过实验分析可以证明,所提方法具备良好的光晕消除性能,光晕消除效果较好。Performing halo elimination operations near halo areas may reduce the contrast,sharpness,and details of the image.Therefore,it is necessary to develop effective methods to restore and enhance the image details after halo elimination,so as to ensure the overall improvement of image quality.To this end,a visual image halo elimination algorithm based on the improved principle of dark channel is designed.An atmospheric scattering model is established to deeply analyze the conditions of the halo generation.The transmittance in the imaging environment is calculated based on the pixel intensity values in the image.A lighting condition research model is established based on the scattering coefficient of atmospheric illumination.Under the conditions of high pixel color channel,a definition of the bright channel of the halo free image is constructed based on the parts of high brightness and strong reflection of the image,the features of the bright channel of the image are clustered,and the transmittance is refined with a fast bilateral filter.So far,an imaging model of the halo image is established.In the process of improving the principle of dark channel,the halo elimination processing of visual images is completed by adjusting multiple calculation parameters,including changing the weight function and setting recovery instructions for halo elimination.After experimental analysis,it can be proven that the proposed method has good halo elimination performance and has a good effect on halo elimination.

关 键 词：改进暗通道 视觉图像 光晕消除 透射率 多尺度算法 大气散射模型 

分 类 号：TN911.73-34[电子电信—通信与信息系统] TP391[电子电信—信息与通信工程]