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针对动态目标的高动态范围图像融合算法研究

High Dynamic Range Image Fusion Algorithm for Moving Targets

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摘要

高动态范围成像技术能够全面有效地反映拍摄场景信息,有利于在复杂环境下获得更高的成像质量。目前基于多曝光图像序列的高动态范围图像融合算法需要高精度配准的输入图像序列,无法克服动态问题带来的影响,无法针对存在动态目标的多曝光图像序列进行高动态范围图像融合。基于此,提出了一种高动态范围图像融合算法。该算法利用基于色彩梯度的微分光流法获得由相机抖动以及场景目标运动导致的多曝光图像之间的动态目标偏移量;结合标定的逆相机响应函数构建高动态范围图像融合权重函数,对存在动态问题影响的多曝光图像进行高动态范围图像融合。实验结果表明,提出的算法无需提前对输入图像序列进行精确配准,能够有效克服动态问题影响,实现动态目标的高动态范围图像融合。

Abstract

High dynamic range imaging technique can reflect the shooting scenario comprehensively and effectively, resulting in high quality imaging in the complex environment. However, the classic high dynamic range image fusion algorithm based on high-precision registration of multiple exposure images cannot deal with the impact of dynamic problems. It fails to realize high dynamic range image fusion when there is a moving target in the exposure images. Therefore, a new high dynamic range fusion algorithm to deal with the dynamic targets is proposed. The derivative optical flow based on color gradient is first utilized to acquire the dynamic target offset of different exposure images, which is caused by the camera shark or the movement of the scenario target. The high dynamic range image fusion weighting function is established by combination of target offset and inverse camera response function, and is applied to the fusion algorithm to tackling the problem of dynamic targets in the high dynamic range images without precise mapping. The experimental results show that without image registration, the proposed algorithm is effective in the fusion of the high dynamic range images with moving targets.

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中图分类号:TN911.73

DOI:10.3788/aos201737.0410001

所属栏目:图像处理

收稿日期:2016-10-26

修改稿日期:2016-12-08

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作者单位    点击查看

都琳:装备学院研究生院, 北京 101416
孙华燕:装备学院光电装备系, 北京 101416
王帅:装备学院研究生院, 北京 101416
高宇轩:装备学院研究生院, 北京 101416
齐莹莹:西安卫星测控中心, 陕西 西安 710000

联系人作者:都琳(daiqisundu@163.com)

备注:都琳(1988-),女,博士研究生,主要从事高动态范围图像处理方面的研究。

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引用该论文

Du Lin,Sun Huayan,Wang Shuai,Gao Yuxuan,Qi Yingying. High Dynamic Range Image Fusion Algorithm for Moving Targets[J]. Acta Optica Sinica, 2017, 37(4): 0410001

都琳,孙华燕,王帅,高宇轩,齐莹莹. 针对动态目标的高动态范围图像融合算法研究[J]. 光学学报, 2017, 37(4): 0410001

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