基于YCbCr空间融合的高动态范围成像方法  

High Dynamic Range Imaging Method Based on YCbCr Color Space Fusion

作　　者：汤璐 卢荣胜[1] 史艳琼 胡海兵 Tang Lu;Lu Rongsheng;Shi Yanqiong;Hu Haibing(College of Instrument Science and OptoElectronics Engineering,Hefei University of Technology,Hefei 230009,Anhui,China;College of Mechanical and Electrical Engineering,Anhui Jianzhu University,Hefei 230022,Anhui,China)

机构地区：[1]合肥工业大学仪器科学与光电工程学院,安徽合肥230009 [2]安徽建筑大学机械与电气工程学院,安徽合肥230022

出　　处：《激光与光电子学进展》2022年第14期298-309,共12页Laser & Optoelectronics Progress

基　　金：国家重点研发计划(2018YFB2003801);国家自然科学基金(51875164)。

摘　　要：多曝光图像融合是一种有效的高动态范围成像方法,融合得到的高动态范围图像包含更多细节和信息量。目前,大多数经典的多曝光图像融合算法存在细节丢失和色彩失真的问题,影响了图像的进一步观察和处理。为了提高融合后图像的清晰度、细节信息和色彩真实程度,提出了一种基于YCbCr空间融合的高动态范围成像方法。将RGB图像转换到YCbCr色彩空间,提出一种改进的适度曝光量指标对亮度分量进行多分辨率加权融合,并采用基于阈值的加权方法融合色度分量。实验结果表明,使用所提方法得到的融合图像视觉效果更加真实,具有较好的色彩表现力,清晰度得到显著提升,可以很好地改善传统基于RGB色彩空间的高动态范围成像方法中出现的色彩失真和信息丢失问题。Multiexposure image fusion is an effective high dynamic range imaging method.The fused high-dynamic-range image contains additional details and information.Currently,most conventional multiexposure image fusion algorithms suffer from detail loss and color distortion,affecting further image observation and processing.To improve the clarity,detail information,and color authenticity of the fused image,a high dynamic range imaging method based on YCbCr spatial fusion is proposed.The red-blue-green(RGB)image is converted to the YCbCr color space,an improved moderate exposure index is proposed to fuse the luminance component with multiresolution weighting,and the chrominance component is fused using the threshold-based weighting method.Experimental results show that the visual effect of the fused image obtained using the proposed method appears more real and exhibits better color expressiveness and the definition is considerably improved,which can well address the problems of color distortion and information loss in conventional high dynamic range imaging methods based on the RGB color space.

关 键 词：成像系统 高动态范围成像 图像融合 YCBCR色彩空间 图像金字塔 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]