Papers › Revisiting Point Cloud Shape Classification with a Simple and Effective Baseline

Revisiting Point Cloud Shape Classification with a Simple and Effective Baseline

9 Jun 2021arXiv:2106.05304archive 2025-07-28

Ankit Goyal, Hei Law, Bowei Liu, Alejandro Newell, Jia Deng

Processing point cloud data is an important component of many real-world systems. As such, a wide variety of point-based approaches have been proposed, reporting steady benchmark improvements over time. We study the key ingredients of this progress and uncover two critical results. First, we find that auxiliary factors like different evaluation schemes, data augmentation strategies, and loss functions, which are independent of the model architecture, make a large difference in performance. The differences are large enough that they obscure the effect of architecture. When these factors are controlled for, PointNet++, a relatively older network, performs competitively with recent methods. Second, a very simple projection-based method, which we refer to as SimpleView, performs surprisingly well. It achieves on par or better results than sophisticated state-of-the-art methods on ModelNet40 while being half the size of PointNet++. It also outperforms state-of-the-art methods on ScanObjectNN, a real-world point cloud benchmark, and demonstrates better cross-dataset generalization. Code is available at https://github.com/princeton-vl/SimpleView.

PaperPDFCodeCode Syntology ran

In Syntology Open this paper in Syntology's Atlas, the map of the papers in Syntology's graph and their citations.

For agents, Syntology's MCP tool lists every function and class Syntology harvested from this paper and whether it ran (how to connect): get_harvested_code_for_paper(arxiv_id="2106.05304")

Code

Syntology Ran 4 of 12 code samples harvested from 2 repositories linked to this paper; 8 have no recorded run. Of those that ran: 1 ran · fixture could not drive it; 3 ran with no contract checked.

By repository: official repository: 9 samples from 1 repository, 1 ran; community (archive-listed): 3 samples from 1 repository, 3 ran. The run record, sample by sample. “Ran” means executed on a synthesized input, not that the code is correct or reproduces the paper.

princeton-vl/SimpleView officialmentioned in papermentioned on GitHubpytorch report
axeber01/point-tnt mentioned on GitHubpytorch report
jiachens/ModelNet40-C mentioned on GitHubpytorchBSD-3-Clause report

Repository list and official/mentioned flags are the archive's, frozen 2025-07-28. Reachability, where shown, is from one Syntology probe window (2026-09-16 to 2026-09-18); repositories not probed show nothing. GitHub stars are not tracked.

Code Syntology ran Syntology

12 samples harvested; 4 ran; 0 honoured the contract we drafted; 8 have no recorded run. Read from Syntology's graph 2026-09-24; that is when this build read the record, not when the samples ran.

1ran · fixture could not drive it
3ran
8unverified

Licence: 0 of the 12 samples are pointer only, meaning Syntology does not serve that copy's text. This page shows no code text for any sample; each one links to its file in the repository.

Harvested from 2 repositories linked to this paper, official or community; each sample names its own and says which. “Ran” means the sample executed on a synthesized input. It does not mean the output is correct, and nothing here reproduces the paper's results. “Honoured” and “violated” refer to a contract Syntology drafted from the code itself; “our draft was wrong” and “fixture could not drive it” are failures of Syntology's instrument, not of the code.

Each sample ends with its code_sha256, Syntology's identity for that exact code. An agent fetches the stored sample with Syntology's MCP tool get_code(code_sha256="…") (how to connect); click an identity to copy that call.

Repository labels, per sample. official repository: The archive marks this repository official for the paper. named in the paper: The archive records that the paper mentions this repository; it is not marked official. community (archive-listed): In the archive's code links for this paper, not marked official and not recorded as mentioned in the paper. found in paper text by Syntology: Syntology found this repository in the paper's own text; whether it is the authors' implementation is not asserted. community: Not in the archive's code links for this paper; a community repository Syntology harvested. Samples from a repository marked official are listed first. Licence labels name the repository's licence as recorded at harvest. “Pointer only” means Syntology does not serve that copy's text, for one of four reasons: no licence file was found; the licence was not identified; the licence is recorded as permissive but that copy's record is not marked cleared; or the licence is outside the permissive list Syntology serves text under (MIT, Apache-2.0, BSD and similar). Some licences outside that list permit redistribution, such as WTFPL, and GPL-3.0 under its conditions; they are simply not on the list. Hover a licence label for the reason. File links open the file on GitHub at the default branch, which may have changed since the harvest.

fixed_padding princeton-vl/SimpleView/ScanObjectNN/SimpleView/multi_model.py official repository ran · fixture could not drive it BSD-3-Clause (permissive) · ca82893aff5e0d2e · report
Model princeton-vl/SimpleView/ScanObjectNN/SimpleView/multi_model.py official repository unverified BSD-3-Clause (permissive) · 0aada2a0a966a06e · report
_bottleneck_block_v1 princeton-vl/SimpleView/ScanObjectNN/SimpleView/multi_model.py official repository unverified BSD-3-Clause (permissive) · b941b66d21901b83 · report
_bottleneck_block_v2 princeton-vl/SimpleView/ScanObjectNN/SimpleView/multi_model.py official repository unverified BSD-3-Clause (permissive) · bd2e7dfc294b27b6 · report
_building_block_v1 princeton-vl/SimpleView/ScanObjectNN/SimpleView/multi_model.py official repository unverified BSD-3-Clause (permissive) · 11702804c488ed55 · report
_building_block_v2 princeton-vl/SimpleView/ScanObjectNN/SimpleView/multi_model.py official repository unverified BSD-3-Clause (permissive) · d4516530837fed03 · report
batch_norm princeton-vl/SimpleView/ScanObjectNN/SimpleView/multi_model.py official repository unverified BSD-3-Clause (permissive) · 6cccb6ae78594ebb · report
block_layer princeton-vl/SimpleView/ScanObjectNN/SimpleView/multi_model.py official repository unverified BSD-3-Clause (permissive) · 5425aca7fe65bb0d · report
conv2d_fixed_padding princeton-vl/SimpleView/ScanObjectNN/SimpleView/multi_model.py official repository unverified BSD-3-Clause (permissive) · a5cb548e4b581359 · report
Attention axeber01/point-tnt/model.py community (archive-listed) ran · metamorphic tier: deterministic MIT (permissive) · 15cfb9f4479acd04 · report
Baseline axeber01/point-tnt/model.py community (archive-listed) ran · metamorphic tier: deterministic fingerprinted MIT (permissive) · fe12c37bc8cebc08 · report
FeedForward axeber01/point-tnt/model.py community (archive-listed) ran · metamorphic tier: deterministic MIT (permissive) · bea49fdbe8f8578a · report

Tasks

3D Point Cloud ClassificationPoint Cloud Classification

Results from the paper archive 2025-07-28

TaskDatasetModelMetricValueRank at snapshotLeaderboardReport
3D Point Cloud Classification ModelNet40 SimpleView-DGCNN Overall Accuracy 93.9 #37 of 111 Archive leaderboard report
Point Cloud Classification PointCloud-C SimpleView mean Corruption Error (mCE) 1.047 #19 of 24 Archive leaderboard report

Ranks are positions in the archive's leaderboards as they stood at the 2025-07-28 snapshot. Results published since then are not among these rows, so a rank here is not a current standing.

Report a problem or propose a change · a person checks every report against the paper or source before anything changes; decisions are listed on /corrections