多光谱成像技术是不同环境下高保真物体颜色再现的关键。在计算机图形学中，采用基于光谱的彩色渲染方法使成像的物理意义明确，比传统的红绿蓝（RGB）三通道彩色渲染方法在应用上有明显优势。讨论了多光谱成像的基本原理，分析了图形学中对成像模型所做的必要近似，并展示了光谱合成颜色的基本方法，介绍了所采用的多光谱渲染器实现方案以及实现上应该注意的问题。以4个实例，从不同方面分析了基于光谱的渲染技术在颜色评价、各种材料物体的外观再现、不同光源对物体表观颜色的影响以及材料反射率重建算法分析等的应用，展示了基于光谱的渲染技术广泛的应用前景。

Multispectral imaging technology is the key for high-fidelity reproduction of objects in various environments. In computer graphics, the rendering method based on multispectral has obvious advantages compared with those of the traditional three-channel red-green-blue (RGB) color rendering method because of the explicit physical meaning of imaging. The basic principle of multispectral imaging is discussed, and the necessary approximation in implementation of multispectral imaging model in computer graphics is analyzed, and a method to synthesize color from spectrum is provided. The multispectral imaging renderer and some problems of realization are simply introduced. Through four cases about color evaluation, object appearance reproduction with different materials, appearance effect of different illuminants and the algorithm of spectral reflectance reconstruction, and the applications of multispectral rendering method are presented.