目录

目录

BSP-Net: Generating Compact Meshes via Binary Space Partitioning


<BSP-Net> Bsp-net: Generating compact meshes via binary space partitioning

review

  • IM-Net同作的续作
  • 效果很好;但是对于thin-structure表现不佳

Motivation

  • take inspiration from binary space partitions,学到更compact / 紧致 / low-poly的mesh表征
    https://longtimenohack.com/posts/paper_reading/2020cvpr_chen_bsp/image-20201229112704532.png

overview

  • 依旧是输入point坐标 + shape code condition,输出inside / outside;
  • 不同之处在于构造的内部模型是n个平面方程,靠n个这样的binary space partition的组合来表征shape
  • 靠binary partition的组合来表达shape的示意图:
    首先组合出一个个的convex凸包,再组合成 whole shape
    • 其实做的事情本质上类似于把MLP+ReLU的空间线性划分过程显式化,不过这里的convex的概念值得思考
示意图网络结构
https://longtimenohack.com/posts/paper_reading/2020cvpr_chen_bsp/image-20201229113148367.pnghttps://longtimenohack.com/posts/paper_reading/2020cvpr_chen_bsp/image-20201229113341539.png

few shot segmentation

  • 因为同category的shape的convex组合之间已经建立起了correspondence,只需要手动给几个shape标一下convex id对应的part label,就可以利用correspondence获得其他同category shape的标注
    https://longtimenohack.com/posts/paper_reading/2020cvpr_chen_bsp/image-20201229113640866.png

results

  • https://longtimenohack.com/posts/paper_reading/2020cvpr_chen_bsp/image-20201229113556212.png
  • https://longtimenohack.com/posts/paper_reading/2020cvpr_chen_bsp/image-20201229114054936.png