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遥感成像的特殊性使得特定目标的遥感图像样本在数量和特征覆盖上存在明显不足,因此迫切需要拓展遥感图像的获取手段。本文提出一种光学遥感图像重光照方法,以单幅样本图像为基础,通过仿真手段获取不同光照条件下成像结果。该方法包含3个主要步骤:首先,基于样本图像和先验信息进行场景的三维重建;然后对样本图像进行预处理,提取场景的材质信息;最后,变换光照条件,以前两步提取的数据为基础进行仿真成像计算获取仿真图像。试验结果表明,本文方法可以获取较为真实的重光照结果。
The particularity of remote sensing imaging makes remote sensing image samples of specific targets have obvious deficiencies in quantity and feature coverage. Therefore, there is an urgent need to expand the acquisition of remote sensing images. In this paper, a method of re-illumination of optical remote sensing images is proposed. Based on the single sample images, the imaging results under different illumination conditions are obtained by simulation. The method includes three main steps: Firstly, the scene is reconstructed based on the sample image and prior information; then the sample image is preprocessed to extract the material information of the scene; finally, the illumination conditions are transformed, the data extracted in the previous two steps is The basis of simulation imaging to obtain simulation images. The experimental results show that the method of this paper can obtain a more realistic lighting result.