Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Grid-GCN for Fast and Scalable Point Cloud Learning   Due to the sparsity and irregularity of the point cloud data, methods that
directly consume points have become popular. Among all point-based models,
graph convolutional networks (GCN) lead to notable performance by fully
preserving the data granularity and exploiting point interrelation. However,
point-based networks spend a significant amount of time on data structuring
(e.g., Farthest Point Sampling (FPS) and neighbor points querying), which limit
the speed and scalability. In this paper, we present a method, named Grid-GCN,
for fast and scalable point cloud learning. Grid-GCN uses a novel data
structuring strategy, Coverage-Aware Grid Query (CAGQ). By leveraging the
efficiency of grid space, CAGQ improves spatial coverage while reducing the
theoretical time complexity. Compared with popular sampling methods such as
Farthest Point Sampling (FPS) and Ball Query, CAGQ achieves up to 50X speed-up.
With a Grid Context Aggregation (GCA) module, Grid-GCN achieves
state-of-the-art performance on major point cloud classification and
segmentation benchmarks with significantly faster runtime than previous
studies. Remarkably, Grid-GCN achieves the inference speed of 50fps on ScanNet
using 81920 points per scene as input.

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The categories of this paper are: hep-ph
22
The categories of this paper are: chao-dyn
35
The categories of this paper are: mtrl-th
14
The categories of this paper are: math-ph
16
The categories of this paper are: stat
30
The categories of this paper are: q-alg
19
The categories of this paper are: eess
29
The categories of this paper are: funct-an
28
The categories of this paper are: alg-geom
10
The categories of this paper are: q-bio
11
The categories of this paper are: hep-lat
32
The categories of this paper are: atom-ph
2
The categories of this paper are: math
13
The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph
12
The categories of this paper are: nucl-th