光学学报, 2016, 36 (7): 0711003, 网络出版: 2016-07-08
基于单帧图像的相机响应函数标定算法 下载: 534次
Camera Response Function Calibration Algorithm Based on Single Frame Image
成像系统 高动态范围图像处理 相机响应函数 边缘颜色分布 贝叶斯估计 单帧图像 imaging systems high dynamic range image processing camera response function edge color distribution Bayesian estimation single frame image
摘要
高动态范围成像技术能够避免因为拍摄方向如逆光和曝光量的不同而使图像存在亮度信息缺失和色差,影响真实场景的信息采集。该技术有利于在复杂环境下获得更高的成像质量,被广泛应用于模式识别、智能交通系统、遥感遥测、**侦察等众多领域。相机响应函数的标定是高动态范围成像技术的关键,能够建立真实场景的辐照度与采集图像亮度值之间的映射关系,从而获得真实场景的高动态范围图像。所提出的算法通过单帧输入图像获得成像系统的相机响应函数,大大地提高了计算效率,并且适用于欠曝光及过曝光条件下采集的图像,扩展了相机响应函数标定算法的应用范围。
Abstract
High dynamic range imaging technique can avoid the brightness loss and aberration of the images because of shooting direction such as backlight and different exposures, which will affect the information collection of real scene. The technique is in favor of higher quality imaging in the complex environment and widely used in pattern recognition, intelligent transportation system, remote sensing, military reconnaissance and other research areas. Camera response function calibration is the key to the high dynamic range imaging technique, which can establish the mapping relation between real scene irradiance and acquired image brightness values. Thus the high dynamic range images in actual scene are acquired. The proposed algorithm can acquire the camera response function of the imaging system by single frame input image, and the calibration efficiency is enhanced greatly. Which is suitable for the under-exposure and over-exposure images, and expands the application range of camera response function calibration.
都琳, 孙华燕, 张廷华, 王帅. 基于单帧图像的相机响应函数标定算法[J]. 光学学报, 2016, 36(7): 0711003. Du Lin, Sun Huayan, Zhang Tinghua, Wang Shuai. Camera Response Function Calibration Algorithm Based on Single Frame Image[J]. Acta Optica Sinica, 2016, 36(7): 0711003.