Yang Defu, Chen Xueli, Ren Shenghan, Qu Xiaochao, Tian Jie, Liang Jimin
School of Life Sciences and Technology, Xidian University, Xi’an, Shaanxi 710126, China.
Appl Opt. 2013 Jan 20;52(3):400-8. doi: 10.1364/AO.52.000400.
A void region exists in some biological tissues, and previous studies have shown that inaccurate images would be obtained if it were not processed. A hybrid radiosity-diffusion method (HRDM) that couples the radiosity theory and the diffusion equation has been proposed to deal with the void problem and has been well demonstrated in two-dimensional and three-dimensional (3D) simple models. However, the extent of the impact of the void region on the accuracy of modeling light propagation has not been investigated. In this paper, we first implemented and verified the HRDM in 3D models, including both the regular geometries and a digital mouse model, and then investigated the influences of the void region on modeling light propagation in a heterogeneous medium. Our investigation results show that the influence of the region can be neglected when the size of the void is less than a certain range, and other cases must be taken into account.
在一些生物组织中存在一个空洞区域，先前的研究表明，如果不进行处理，将会获得不准确的图像。为了解决空洞问题，人们提出了一种将辐射度理论与扩散方程相结合的混合辐射度-扩散方法（HRDM），并且该方法在二维和三维（3D）简单模型中得到了很好的验证。然而，空洞区域对光传播建模精度的影响程度尚未得到研究。在本文中，我们首先在3D模型（包括规则几何形状和数字小鼠模型）中实现并验证了HRDM，然后研究了空洞区域对非均匀介质中光传播建模的影响。我们的研究结果表明，当空洞尺寸小于一定范围时，该区域的影响可以忽略不计，而其他情况则必须考虑。
