基于T样条拼接的彩椒果实可视化研究

彩椒果实表面具有沟痕深、凹凸性强等特征,难以获取曲面造型所需控制点。为克服以上缺点,提出利用T样条无缝拼接的方法进行彩椒果实几何建模。首先根据形态特征将彩椒分为若干片段,利用三维扫描仪获取各片段三维数据点,然后应用NURBS曲面分别建立各个片段的模型,最后使用T样条的无缝拼接算法将各片段组合为完整的彩椒模型,并在VC++和OpenGL平台得到了真实感较强的彩椒果实可视化模型。实验表明,该方法不仅能够拼接片段之间的缝隙,还能极大地增加模型的真实感。

Research on Visualization of Bell Pepper Fruit Based on T-Splines Merging

The surface of bell pepper fruit has many big creasing,concave and convex.It is very difficult to get control points.In order to overcome the disadvantages above,the method based T-splines merging was proposed for modeling bell pepper fruit.Firstly,the fruit could be cut to several parts according to the contour of pepper.Secondly,3-dimension data points could be got by 3d scanner and every part could be simulated with NURBS surface.Finally,A complete bell pepper model was given by merging every part taking advantage of T-splines merging algorithm.Besides,the proposed algorithm was implemented by integrating VC++ and OpenGL.The experimental results show that this method not only can join every part successfully but also can simulate the bell pepper fruit visually with highly realistic rendering effects.