Restoration of HDR Images for SVE-Based HDRI via a Novel DCNN
Yilun Xu, Ziyang Liu, Xingming Wu, Weihai Chen, Zhengguo G. Li · 2021
Ghosting artifacts are believed to be the Achilles’ heel for high dynamic range (HDR) imaging (HDRI) via differently exposed images sequentially captured by a digital device. Spatially varying exposure (SVE)-based HDRI is an efficient solution to prevent the ghosting artifacts from appearing in a HDR image. However, it is challenging to restore a high-quality HDR image with the full resolution from a single raw Bayer image for the SVE-based HDRI. In this paper, a novel deep convolution neural network (DCNN) is proposed to address such a challenging problem. The proposed DCNN includes two distinctive components, a spatially varying convolution and an exposedness-aware compensation branch. The evaluations indicate that the quality of our results significantly surpasses several related algorithms. Related materials will be provided at https://github.com/yilun-xu/SVEHDRI/.