摘要： 为解决高动态范围图像在传统显示设备中准确显示的问题,将模糊的视觉注意机制转化为确定的特征点个数,提出一种基于图像特征的评价体系,以判别色调映射方法所得结果图像是否保持特征信息。针对图像进行对比度调整,将场景亮度变换到可以显示的范围,同时保持细节与颜色等对于表现原始场景的重要信息。对7种色调映射全局方法,即LogarithmicTMO, ExponentialTMO, TumblinRushmeierTMO, SchlickTMO, FerwerdaTMO,WardHistAdjTMO,DragoTMO进行比较分析,得出WardHistAdjTMO色调映射的整体效果最优。

关键词: 高动态范围, 色调映射, 全局算子, 评价体系, 图像特征

Abstract: In order to solve the problem of accurate display for High Dynamic Range(HDR) images on the traditional display device,this paper converts the uncertain visual attention mechanism to the number of certain features and proposes an evaluation system based on image feature to identify whether the resulted image of the tone mapping method keeps the features or not.Drastic contrast adjustment is made for the images,and the brightness of the scene is transformed into a range that can be displayed,while maintaining details and color which are very important for the display of the original scene.Seven global tone mapping methods are compared and analyzed,which are LogarithmicTMO,ExponentialTMO,TumblinRushmeierTMO,SchlickTMO,FerwerdaTMO,WardHistAdjTMO and DragoTMO.The overall effect of WardHistAdjTMO tone mapping is optimal.

Key words: High Dynamic Range(HDR), tone mapping, global operator, evaluation system, image feature

中图分类号: 

• TP751.1