融合光照补偿的低照度图像增强算法  

A Low Illuminance Image Enhancement Algorithm Combining Light Compensation

作　　者：李凯勇 LI Kai-yong(National Demonstration Center for Experimental Communication Engineering Education,Qinghai Minzu University,Xining 810007,China;Key Laboratory of Communication Engineering,Qinghai Minzu University,Xining 810007,China;School of Physics and Electronic Information Engineering,Qinghai minzu University,Xining 810007,China)

机构地区：[1]青海民族大学通信工程国家级实验教学示范中心,青海西宁810007 [2]青海民族大学通信工程重点实验室,青海西宁810007 [3]青海民族大学物理与电子信息工程学院,青海西宁810007

出　　处：《电脑与信息技术》2024年第6期46-49,共4页Computer and Information Technology

基　　金：2023年青海民族大学中华民族艺术研究院“青绣文化保护的创意设计方法研究”(项目编号:23YSYJ02)。

摘　　要：由于低照度图像自身的光照分布不均,导致当前直接增强的算法视觉效果较差,为此,提出融合光照补偿的低照度图像增强算法。根据低照度条件下的图像成像模型的分析结果,选择采用高斯平滑处理对低照度图像进行平滑操作,以减少噪声并提升图像质量。通过归一化处理,获取满足同一照度要求的补偿因子参数,根据补偿因子对不同照度的图像进行光照补偿,使其具有均匀性和一致性的亮度。利用多级Haar小波变换对经过光照补偿的图像的粗、细粒度像素进行增强处理,以提高图像的视觉效果和清晰度。测试结果表明,设计算法可以从人眼视觉系统角度和客观信息分布角度实现对低照度图像的高质量增强处理,且图像实际增强效果较好。Due to the uneven distribution of light in low illumination images,the current algorithms for direct enhancement have poor visual effects.Therefore,a low illumination image enhancement algorithm integrating light compensation is proposed.Based on the analysis results of the image imaging model under low illumination conditions,Gaussian smoothing is chosen to smooth the low illumination image to reduce noise and improve image quality.By normalization processing,compensation factor parameters that meet the same illuminance requirements are obtained.Based on the compensation factor,images with different illuminances are compensated for illumination to achieve uniform and consistent brightness.Using multi-level Haar wavelet transform to enhance the coarse and fine grained pixels of the image after illumination compensation,in order to improve the visual effect and clarity of the image.The test results show that the designed algorithm can achieve high-quality enhancement of low illumination images from the perspective of the human visual system and objective information distribution,and the actual image enhancement effect is good.

关 键 词：光照补偿 低照度图像 增强算法 高斯平滑处理 补偿因子参数 多级Haar小波变换 

分 类 号：TP394.11[自动化与计算机技术—计算机应用技术]