低照度环境的车辆检测算法研究

Research on Vehicle Detection Algorithm Based on Low Illumination Environment

夜间等低照度环境下,光源复杂、采集图像伴有噪声,图像细节信息弱化,造成夜间车辆目标特征提取困难,误检率、漏检率高。本文以夜间微弱路灯下车辆为研究目标,采集低照度环境中车辆图片,构造夜间车辆数据集,对低照度车辆数据集中部分较暗图像进行低照度图像增强处理,并使用增强后的图片对夜间车辆数据集进行扩展。采用YOLOv5s建立夜间车辆检测模型,并在此基础上采用ShuffleNetv2的思想对网络继续优化,结构改进后的检测网络对夜间远处车辆和被遮挡车辆的检测效果更好。

At night or in other low illumination environments,the light source is complex,the acquisition image is accompanied by noise,and the detail information of the image is weakened,which result in the difficulty of vehicle target feature extraction,high false detection rate and high missed rate at night.The vehicle images under weak street lights at night is taken as the research target.The vehicle data sets in low illumination environment are constructed,and part of the darker images of the data sets are enhanced.Next,the enhanced image is paired with the original image as a training set and input into YOLOv5 to establish the vehicle detection model at night,and ShuffleNetv2 is adopted to further optimize the network.The improved detection network performs better on detecting distant vehicles and blocked vehicles at night.