实时交互的带浮雕纹理的三维模型构建方法

摘要

为了快速生成带浮雕纹理的三维模型,提出一种实时交互的浮雕纹理模型构建方法.方法分两步:第一步,将生成浮雕的源模型或图像转换为初始深度图,并进一步转换为梯度图,再通过梯度域的压缩、过滤,求解线性方程重建出整体连续的浮雕深度图;第二步,借助基于网格求交的浮雕纹理映射算法将浮雕深度图贴在目标模型表面,并通过移动、旋转、缩放等操作实时在目标模型三维空间上修改浮雕效果,最终重建目标模型网格,生成浮雕纹理模型.实验表明,所提方法可快速实现在一个目标模型上生成凹浮雕、凸浮雕、多浮雕等效果,所得模型无需经过其他处理,可直接应用于3D打印,打印效果较好.%In order to reconstruct 3D objects with relief-texture quickly,a modeling method based on real-time interaction for 3D objects was proposed.Firstly,the input object or image that needed to generate relief texture was converted into an initial depth map,then the depth map was converted into a gradient image.The obtained gradient image was compressed and filtered,then the continuous relief depth map was reconstructed by solving the linear equation.Secondly,using the proposed relief-texture-mapping algorithm based on mesh intersection,the optimized relief depth image was pasted on the goal object surface by real-time interaction including translation,rotation and scale under 3D scene directly.Finally,an object with relief-texture was achieved through re-triangulation of the goal model.The experimental results show that the proposed method can quickly generate concave or convex,especially multiple reliefs on the goal object,the final obtained model can be directly applied to 3 D printing without any other processing.