Papers › CornerNet: Detecting Objects as Paired Keypoints

CornerNet: Detecting Objects as Paired Keypoints

3 Aug 2018ECCV 2018 9arXiv:1808.01244archive 2025-07-28

Hei Law, Jia Deng

We propose CornerNet, a new approach to object detection where we detect an object bounding box as a pair of keypoints, the top-left corner and the bottom-right corner, using a single convolution neural network. By detecting objects as paired keypoints, we eliminate the need for designing a set of anchor boxes commonly used in prior single-stage detectors. In addition to our novel formulation, we introduce corner pooling, a new type of pooling layer that helps the network better localize corners. Experiments show that CornerNet achieves a 42.2% AP on MS COCO, outperforming all existing one-stage detectors.

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Code

Syntology Ran 3 of 11 code samples harvested from 1 repository linked to this paper; 8 have no recorded run. Of those that ran: 1 ran · honoured contract; 2 ran · our draft was wrong.

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princeton-vl/CornerNet officialmentioned in papermentioned on GitHubpytorchBSD-3-Clause report
egeonat/MS-CornerNet mentioned on GitHubpytorch report
gau-nernst/CenterNet mentioned on GitHubpytorchMIT report
open-mmlab/mmdetection pytorchApache-2.0 report

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11 samples harvested; 3 ran; 1 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 · honoured contract
2ran · our draft was wrong
8unverified

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make_layer_revr princeton-vl/CornerNet/models/py_utils/utils.py official repository ran · our draft was wrong BSD-3-Clause (permissive) · 09a07cdf34e60fa0 · report
make_merge_layer princeton-vl/CornerNet/models/py_utils/kp_utils.py official repository ran · our draft was wrong BSD-3-Clause (permissive) · 07caa911e46fcb23 · report
make_pool_layer princeton-vl/CornerNet/models/CornerNet.py official repository ran · honoured contract BSD-3-Clause (permissive) · c2515898895b1abb · report
data_parallel princeton-vl/CornerNet/models/py_utils/data_parallel.py official repository unverified BSD-3-Clause (permissive) · 61bf3906cbd2ee87 · report
make_br_layer princeton-vl/CornerNet/models/CornerNet.py official repository unverified BSD-3-Clause (permissive) · 4d2829871f321cca · report
make_br_layer princeton-vl/CornerNet/models/py_utils/kp_utils.py official repository unverified BSD-3-Clause (permissive) · 64475ebc43c0a3ea · report
make_layer princeton-vl/CornerNet/models/py_utils/utils.py official repository unverified BSD-3-Clause (permissive) · 74bee3912d0b766e · report
make_tl_layer princeton-vl/CornerNet/models/CornerNet.py official repository unverified BSD-3-Clause (permissive) · b859f01af13f1c20 · report
make_tl_layer princeton-vl/CornerNet/models/py_utils/kp_utils.py official repository unverified BSD-3-Clause (permissive) · 26448a43d8f15aeb · report
scatter princeton-vl/CornerNet/models/py_utils/scatter_gather.py official repository unverified BSD-3-Clause (permissive) · 4c7015c577141603 · report
scatter_kwargs princeton-vl/CornerNet/models/py_utils/scatter_gather.py official repository unverified BSD-3-Clause (permissive) · 08aa371b972a4c91 · report

Tasks

ObjectObject Detectionobject-detection

Results from the paper archive 2025-07-28

TaskDatasetModelMetricValueRank at snapshotLeaderboardReport
Object Detection COCO minival CornerNet511 (Hourglass-104) AP50 53.8 #197 of 220 Archive leaderboard report
Object Detection COCO minival CornerNet511 (Hourglass-104) AP75 40.9 #197 of 220 Archive leaderboard report
Object Detection COCO minival CornerNet511 (Hourglass-104) APL 51.8 #197 of 220 Archive leaderboard report
Object Detection COCO minival CornerNet511 (Hourglass-104) APM 40.5 #197 of 220 Archive leaderboard report
Object Detection COCO minival CornerNet511 (Hourglass-104) APS 18.6 #197 of 220 Archive leaderboard report
Object Detection COCO minival CornerNet511 (Hourglass-104) box AP 38.4 #197 of 220 Archive leaderboard report
Object Detection COCO test-dev CornerNet511 (Hourglass-104, multi-scale) AP50 57.8 #176 of 225 Archive leaderboard report
Object Detection COCO test-dev CornerNet511 (Hourglass-104, multi-scale) AP75 45.3 #176 of 225 Archive leaderboard report
Object Detection COCO test-dev CornerNet511 (Hourglass-104, multi-scale) APL 56.7 #176 of 225 Archive leaderboard report
Object Detection COCO test-dev CornerNet511 (Hourglass-104, multi-scale) APM 44.8 #176 of 225 Archive leaderboard report
Object Detection COCO test-dev CornerNet511 (Hourglass-104, multi-scale) APS 20.8 #176 of 225 Archive leaderboard report
Object Detection COCO test-dev CornerNet511 (Hourglass-104, multi-scale) box mAP 42.1 #176 of 225 Archive leaderboard report
Object Detection COCO test-dev CornerNet511 (Hourglass-52, single-scale) AP50 53.7 #216 of 225 Archive leaderboard report
Object Detection COCO test-dev CornerNet511 (Hourglass-52, single-scale) AP75 40.1 #216 of 225 Archive leaderboard report
Object Detection COCO test-dev CornerNet511 (Hourglass-52, single-scale) APL 50.5 #216 of 225 Archive leaderboard report
Object Detection COCO test-dev CornerNet511 (Hourglass-52, single-scale) APM 39.0 #216 of 225 Archive leaderboard report
Object Detection COCO test-dev CornerNet511 (Hourglass-52, single-scale) APS 17.0 #216 of 225 Archive leaderboard report
Object Detection COCO test-dev CornerNet511 (Hourglass-52, single-scale) box mAP 37.8 #216 of 225 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.

Methods

Introduced by this paper: CornerNet

1x1 ConvolutionAdamColorJitterConvolutionCorner PoolingCornerNetFocal LossHourglass ModuleMax PoolingNon Maximum SuppressionRandom Horizontal FlipRandom Resized CropReLUResidual ConnectionStacked Hourglass NetworkStep Decay

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