高动态范围图像色调映射算法研究

Research on Tone-Mapping Algorithms for High Dynamic Range Image

高动态范围(High Dynamic Range,HDR)图像依托自身场景性能的优越性,近年来备受瞩目。然而,HDR图像显示设备由于成本和技术问题而难以普及,HDR图像必须经过色调映射(Tone-Mapping,TM)才能由传统显示器生成自适应低动态范围(Low Dynamic Range,LDR)的数据。近年来,TM技术发展迅猛,但也衍生出一系列问题。对此,首先通过HDR图像TM算法,在算法上将其分化为整体色调映射算法、部分色调映射算法以及混合色调映射算法;其次分析其优缺点,并对一些经典方法进行实验分析,比较算法的性能;最后总结TM技术的发展趋势。

High Dynamic Range(HDR)images have attracted much attention in recent years because of their own advantages in scene performance.However,HDR image display devices are difficult to be popularized due to cost and technical problems.HDR images must be Tone Mapping(TM)to generate adaptive Low Dynamic Range(LDR)data from traditional displays.In recent years,TM technology has developed rapidly,but a series of problems have emerged.In this regard,firstly,through the TM algorithm of HDR image,the algorithm is divided into global tone mapping algorithm,partial tone mapping algorithm and mixed tone mapping algorithm;then,the advantages and disadvantages of the algorithm are analyzed,and some classical methods are tested to compare the performance of the algorithm;finally,the development trend of TM technology is summarized.