DeepAI AI Chat
Log In Sign Up

Hashing-based Non-Maximum Suppression for Crowded Object Detection

by   Jianfeng Wang, et al.

In this paper, we propose an algorithm, named hashing-based non-maximum suppression (HNMS) to efficiently suppress the non-maximum boxes for object detection. Non-maximum suppression (NMS) is an essential component to suppress the boxes at closely located locations with similar shapes. The time cost tends to be huge when the number of boxes becomes large, especially for crowded scenes. The basic idea of HNMS is to firstly map each box to a discrete code (hash cell) and then remove the boxes with lower confidences if they are in the same cell. Considering the intersection-over-union (IoU) as the metric, we propose a simple yet effective hashing algorithm, named IoUHash, which guarantees that the boxes within the same cell are close enough by a lower IoU bound. For two-stage detectors, we replace NMS in region proposal network with HNMS, and observe significant speed-up with comparable accuracy. For one-stage detectors, HNMS is used as a pre-filter to speed up the suppression with a large margin. Extensive experiments are conducted on CARPK, SKU-110K, CrowdHuman datasets to demonstrate the efficiency and effectiveness of HNMS. Code is released at <>.


page 1

page 2

page 3

page 4


DiffusionDet: Diffusion Model for Object Detection

We propose DiffusionDet, a new framework that formulates object detectio...

OneNet: Towards End-to-End One-Stage Object Detection

End-to-end one-stage object detection trailed thus far. This paper disco...

Anchor-free Oriented Proposal Generator for Object Detection

Oriented object detection is a practical and challenging task in remote ...

PSRR-MaxpoolNMS: Pyramid Shifted MaxpoolNMS with Relationship Recovery

Non-maximum Suppression (NMS) is an essential postprocessing step in mod...

CenterNet: Object Detection with Keypoint Triplets

In object detection, keypoint-based approaches often suffer a large numb...

DeRPN: Taking a further step toward more general object detection

Most current detection methods have adopted anchor boxes as regression r...

From Voxel to Point: IoU-guided 3D Object Detection for Point Cloud with Voxel-to-Point Decoder

In this paper, we present an Intersection-over-Union (IoU) guided two-st...