Choi Jongwon, Yun Sangdoo, Choi Jin Young
Opt Express. 2022 Jun 6;30(12):20927-20942. doi: 10.1364/OE.452957.
This paper proposes an optimization-based method to remove highlights from specular surfaces without any special device other than a flash, or any limited capturing environment required by existing methods. Accordingly, we formulate an optimization problem to estimate a highlight-free image from the difference image between a flash/no-flash image pair. This optimization will automatically find and recover erroneous pixels (saturated pixels and remaining highlights) in the difference image. The optimization is designed to recover erroneous pixels using the intensities of their neighboring pixels while retaining the other correct pixels to preserve the original image details. We evaluated the proposed method qualitatively and quantitatively through experimentation using datasets of synthetic and real-world scenes. In the experiments, the proposed method outperforms existing state-of-the-art methods.
本文提出了一种基于优化的方法，无需除闪光灯之外的任何特殊设备，也无需现有方法所要求的任何受限拍摄环境，即可去除镜面表面的高光。相应地，我们构建了一个优化问题，以便从闪光灯/无闪光灯图像对之间的差异图像中估计出无高光图像。该优化将自动在差异图像中找到并恢复错误像素（饱和像素和残留高光）。此优化旨在利用相邻像素的强度来恢复错误像素，同时保留其他正确像素以保持原始图像细节。我们通过使用合成场景和真实场景数据集进行实验，对所提出的方法进行了定性和定量评估。在实验中，所提出的方法优于现有的最先进方法。
