基于视觉传达技术的无参考低光照图像增强方法  

A method of low light image enhancement without reference based on visual communication technology

作　　者：林伟 赵继平 刘世章 LIN Wei;ZHAO Jiping;LIU Shizhang(Chengdu College of University of Electronic Science and Technology of China,Chengdu 611731,China)

机构地区：[1]电子科技大学成都学院,成都611731

出　　处：《激光杂志》2024年第2期140-145,共6页Laser Journal

基　　金：四川省科技计划资助项目(No.2019YJ0114)。

摘　　要：为了优化低光照图像增强效果,提出基于视觉传达的无参考低光照图像增强方法。所提方法通过全景成像技术重构低光照图像,并采用计算机原理模拟光学成像系统,引入多重分形法和半软阈值指数衰减法去除重构图像上的噪声。通过亮暗双通道系数计算图像增强过程中的最佳透射率,并以此透射率对低光照图像展开增强处理。实验结果表明,所提方法重构图像完整、图像整体质量高、SIMM值接近于1,在不影响图像清晰度的前提下实现了图像去噪,对低光照图像的增强效果明显,避免了增强过程中的图像曝光,做到了图像细节的完整保留。In order to optimize the low-light image enhancement effect,a non-reference low-light image enhancement method based on visual communication is proposed.The proposed method reconstructs the low-light image through panoramic imaging technology,uses computer principles to simulate the optical imaging system,and introduces multifractal method and semi-soft threshold exponential attenuation method to remove the noise on the reconstructed image.The best transmittance in the process of image enhancement is calculated by the light and dark dual-channel coefficient,and the low-light image is enhanced by this transmittance.The experimental results show that the reconstructed image is complete,the overall quality of the image is high,and the SIMM value is close to 1.The image denoising is achieved without affecting the image definition.The enhancement effect on the low-light image is obvious,avoiding the image exposure during the enhancement process,and achieving the complete retention of image details.

关 键 词：全景成像技术 光学成像系统 多重分形法 半软阈值指数衰减法 亮暗双通道系数 

分 类 号：TN911[电子电信—通信与信息系统]