2026-04-17T23:23:01Zhttps://recercat.cat/oai/request
oai:recercat.cat:2117/3359992026-02-11T06:11:28Zcom_2072_1033col_2072_452950
RECERCAT author Oro García, David author Fernandez Tena, Carles author Martorell Bofill, Xavier author Hernando Pericás, Francisco Javier 2020-08-21 In the context of object detection, sliding-window classifiers and single-shot convolutional neural network (CNN) meta-architectures typically yield multiple overlapping candidate windows with similar high scores around the true location of a particular object. Non-maximum suppression (NMS) is the process of selecting a single representative candidate within this cluster of detections, so as to obtain a unique detection per object appearing on a given picture. In this paper, we present a highly scalable NMS algorithm for embedded graphics processing unit (GPU) architectures that is designed from scratch to handle workloads featuring thousands of simultaneous detections on a given picture. Our kernels are directly applicable to other sequential NMS algorithms such as FeatureNMS, Soft-NMS or AdaptiveNMS that share the inner workings of the classic greedy NMS method. The obtained performance results show that our parallel NMS algorithm is capable of clustering 1024 simultaneous detected objects per frame in roughly 1 ms on both Tegra X1 and Tegra X2 on-die GPUs, while taking 2 ms on Tegra K1. Furthermore, our proposed parallel greedy NMS algorithm yields a 14–40x speed up when compared to state-of-the-art NMS methods that require learning a CNN from annotated data.This work has been partially supported by the Ministerio de Economía y Competitividad under contracts (TIN2015-65316-P, TEC2012-38939-C03-02), the Departament d’Innovació, Universitats i Empresa de la Generalitat de Catalunya under project MPEXPAR: Models de Programació i Entorns d’Execució Paral·lels (2014-SGR-1051), and the European Commission under the Horizon 2020 program (H2020-ICT-644312).Peer ReviewedPostprint (author's final draft) Open Access Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Processament del senyal::Processament de la imatge i del senyal vídeo Image processing Non-maximum suppression Object detection GPU computing Parallel computing Imatges -- Processament Work-efficient parallel non-maximum suppression kernels Article