关键词: 高动态范围图像融合, 相机响应曲线, 色调映射, 色彩校正

Abstract:

Highdynamicrange imaging technique can provide a very efficient way of reconstructing the image of objects and the surrounding environment, so it is currently widely applied in the domain of military,aerospace science etc.and has shown significant value in academia.In this paper, a series of images of the same scenario under different levels of exposure are taken by Cannon 1DC.The camera response curve of the colorful images in different channels is depicted through careful computational deduction.The image with a high dynamic range is then obtained through the establishment of the radiance map between the gray value and the irradiance. Thirdly, the bilateralfilterbased tone mapping algorithm is applied again to conduct the compression of the highdynamicrange images. Finally, the color calibration is implemented by the specularreflectionbased white balance method. In the experiment, images with different frames are selected to demonstrate the efficiency of the proposed algorithm. Experimental results show that at least 4 frames are required to realize highdynamicrange image fusion.

Key words: high dynamic range image fusion;camera response function;tone mapping;color correction