基于像素空间的植物叶片干枯褶皱模拟

Simulation of withered wrinkles of plant leaves based on pixel space

提出一种基于像素空间的植物叶片干枯褶皱模拟框架,可实时地对叶片的干枯现象进行真实渲染。首先基于植物的干枯叶片图像生成褶皱法向量纹理并对其进行无缝处理;其次将褶皱法向量纹理映射到叶片三维模型上;然后构建融合函数将褶皱法向量与叶片模型法向量进行插值,使叶片模型的法向量可在无褶皱和充满褶皱两种状态之间进行光滑过渡;最后从几何空间对植物叶片进行面积缩放仿真。结果表明,本文方法简单高效且真实感效果好,因此,适用于以交互浏览为目的的虚拟农业应用系统中。

This framework could render the withered plant leaves in real time. First, the wrinkle normal vector texture based on the image of withered plant leaves was obtained and then processed seamlessly. Second, the wrinkle vector normal texture was mapped onto a three-dimensional blade model. Then a fu-sion function was built to do interpolation between the wrinkle normal vector and the blade model normal vector, by which the normal vector of the blade model can smoothly transit between none wrinkle and full of wrinkles states. Finally, the area changes on plant leaves from geometric space were simulated.This method is simple, efficient with good realistic effects. Therefore, it is applicable to the virtual agriculture application system which aims to interactive browsing.