基于投影技术的虚拟文物展示系统

Virtual Cultural Exhibition System Based on Projection Technology

为了更好地将投影映射技术应用于博物馆的数字展览,获得高质量的投影效果,设计出一套具有真实感的3D效果和高保真外观的三维数字文物展示系统.该系统利用机械旋转的实物模型和真实文物的图像,将多投影映射技术和光学透视显示相结合,采用几何学与辐射定标方法,在不发生透视畸变的情况下,将高质量的文物纹理正确地投射到动态的3D文物模型投影面上,增加投影效果和投影内容的自由度.为了评估该系统在一般博物馆环境光的影响和周围物阴影遮挡等问题,利用不同强度的光线对该系统投影区和展示区进行了测试,证明了该系统对周围环境光具有较强的鲁棒性和博物馆环境下的部署潜力,使博物馆数字文物展示内容变得更为丰富.

For better performance of the projection mapping technology applied to the digital exhibition of museums and high-quality projection, a 3D digital display system for cultural relics is designed with realistic 3D modeling and a highfidelity appearance. The system relies on the physical model of mechanical rotation and the image of real cultural relics and combines multiple projection mapping technologies with the optical see-through display. Both geometric and radiometric calibration methods are used to correctly project a high-quality texture onto the moving 3D projection surface without perspective distortion to increase the projection effect and the degree of freedom of the projection content. For the evaluation of the influence of the ambient light and the shadow occlusion by the surrounding objects in general museums on the system, the projection area and display area of the system are tested with different intensities of light. Experimental results show that the system has strong robustness to the influence of the ambient light and the potential for deployment in a general museum context, making the digital display of cultural relics richer.