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光照条件是影响可见光遥感成像结果的重要因素,是成像仿真领域的一项重要研究内容。提出一种基于几何映射的遥感成像光照仿真方法,以单幅遥感图像样本和三维模型为输入,获取不同光照条件仿真图像。对输入的样本图像进行几何定标,并通过逆向渲染提取场景的可见光反射特性数据;利用场景几何模型,通过几何映射方法获取样本图像各像素点的几何信息;根据设定的光照条件在图像空间进行成像仿真计算,获取不同光照条件的仿真结果。实验表明,该方法能够实现较为真实的光照仿真。
Light conditions are important factors that affect the result of visible light remote sensing imaging and are an important research area in imaging simulation. A simulation method of remote sensing imaging illumination based on geometric mapping is proposed. Single remote sensing image sample and three-dimensional model are used as input to obtain simulation images under different illumination conditions. Geometry calibration is performed on the input sample image, and the visible light reflection characteristic data of the scene is extracted by reverse rendering. The geometrical information of each pixel of the sample image is obtained by the geometric mapping method by using the scene geometric model. Based on the set illumination conditions, Imaging simulation to obtain simulation results of different lighting conditions. Experiments show that this method can achieve a more realistic lighting simulation.