2) penumbra
[英][pi'nʌmbrə] [美][pɪ'nʌmbrə]
半影;边缘;黑影周围的半阴影
5) penumbra
[英][pi'nʌmbrə] [美][pɪ'nʌmbrə]
半影
1.
Genetic algorithm is utilized to optimize the leaf end shape to improve the size and uniformity of leaf-end penumbra.
使用遗传算法对叶片端面形状进行了优化设计,使端面产生的半影大小和一致性得以改善。
2.
Firstly,we generated two depth buffers for occluder and receiver,discretizing the occluder to micro-patches;then,we calculated the depth value of shadow for each micro-patch and estimated the visibilities of them;finally,we computed penumbra extent for each micro-patch and projected soft shadow map on the scene to obtain real-time soft shadows.
首先为场景中遮挡物、接收面计算深度缓存,并离散遮挡物成许多微面;接着计算每个微面的阴影深度值,估计微面的可见度;最后计算微面半影范围,将软阴影图投影回场景中,得到实时软阴影。
3.
According to the requirements of precision conformal dose delivery, the side focused and tongue-groove structure of multi-leaf collimator is determined, and genetic algorithm is utilized to optimize the leaf end shape, which results in the improvement of penumbra size and uniformity.
根据剂量精确适形的要求,确定了多叶组合光栅侧面的聚焦和榫槽结构,使用遗传算法对叶片端面形状进行了优化设计,使端面产生的半影大小和一致性得以改善。
6) Umbra/penumbra
本影/半影
补充资料：半影
1.半个影子。 2.不透明体遮住比较大的发光体光源时，所产生的影子就有两部分，完全暗的部分叫本影，半明半暗的部分叫半影。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条