CAJ | 학술논문

三维场景的虚拟导航需要同时保证相机视角的光滑性和智能性，在算法设计上极具挑战。文章研发了一套实时自动生成光滑连续且高效的相机路径导航系统。首先通过线下模型几何分析和语义分析，包含分析场景中建筑物模型、道路模型以及非建筑的重要模型等，求得模型重要性值；其次是自适应地获取路线采样点以及高效存储采样点的视角图片；最后是利用动态规划的方式求出每个采样点的最佳视角并光滑地连接这些采样点形成相机运行轨迹。4个不同三维场景的实验结果表明了所提算法的高效性和智能性，同时文章所进行的用户调查也充分反映了所提方法具有的明显优势。
삼유장경적허의도항수요동시보증상궤시각적광활성화지능성，재산법설계상겁구도전。문장연발료일투실시자동생성광활련속차고효적상궤로경도항계통。수선통과선하모형궤하분석화어의분석，포함분석장경중건축물모형、도로모형이급비건축적중요모형등，구득모형중요성치；기차시자괄응지획취로선채양점이급고효존저채양점적시각도편；최후시이용동태규화적방식구출매개채양점적최가시각병광활지련접저사채양점형성상궤운행궤적。4개불동삼유장경적실험결과표명료소제산법적고효성화지능성，동시문장소진행적용호조사야충분반영료소제방법구유적명현우세。
Virtual navigation in 3D scenes requires both smooth and intelligent camera control, which is a very challenging task. In this paper, a real time navigation system that could automatically generate an effective and smooth camera lfyby trajectory was presented. Firstly, oflfine geometric and semantic features of models were analyzed in the given 3D scene, including buildings, roads and other visible parts, to evaluate the importance of models. Secondly, the path from origin to destination was sampled adaptively, and visual images from different views on each sampled point were stored effectively. Finally, the best view on each sampled point was extracted and connected smoothly to get the camera lfyby trajectory. The experiments done in four different 3D scenes clearly demonstrate the efifciency and intelligence of the proposed algorithm, and the user investigation also veriifes its superiority over the existing methods.