136056 20240731103324.0 doi 10.1109/ICASSP49357.2023.10094929 sideral 134978 ART-2023-134978 eng Luesia-Lahoz, Pablo Universidad de Zaragoza (orcid)0000-0002-5778-1819 Zone Plate Virtual Lenses for Memory-Constrained NLOS Imaging 2023 Access copy available to the general public Unrestricted The recently introduced Phasor Fields framework for non-line-of-sight imaging allows to image hidden scenes by treating a relay surface as a virtual camera. It formulates the problem as a diffractive wave propagation, solved by the Rayleigh–Sommerfeld diffraction (RSD) integral. Efficient Phasor Fields implementations employ RSD-based kernels to propagate waves from parallel planes by means of 2D convolutions. However, the kernel storage requisites are prohibitive, hampering the integration of these techniques in memory-constrained devices and applications like car safety. Instead of relying on expensive RSD kernels, we propose the use of alternative virtual lenses to focus on the incomeing phasor field and image hidden scenes. In particular, we propose using zone plates (ZP), which require significant less memory. As our results show, our ZP virtual lenses allow us to obtain reasonable reconstructions of the hidden scene, offering an attractive trade-off for memory-constrained devices. info:eu-repo/grantAgreement/ES/DGA/LMP30-21 info:eu-repo/grantAgreement/EC/HORIZON EUROPE/101135156/EU/European iNitiative for Low cost, Innovative and Green High Thrust ENgine - Engine Demonstration/ENLIGHTEN info:eu-repo/grantAgreement/ES/MICINN/PID2019-105004GB-I00 info:eu-repo/semantics/embargoedAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 1.05 2023 Electrical and Electronic Engineering 2023 Software 2023 Signal Processing 2023 6.3 2023 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Gutiérrez, Diego Universidad de Zaragoza (orcid)0000-0002-7503-7022 Muñoz, Adolfo Universidad de Zaragoza (orcid)0000-0002-8160-7159 5007 570 Universidad de Zaragoza Dpto. Informát.Ingenie.Sistms. Área Lenguajes y Sistemas Inf. 2023 (2023), [5 pp.] Proceedings - ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing 0736-7791 1490377 http://zaguan.unizar.es/record/136056/files/texto_completo.pdf Postprint info:eu-repo/date/embargoEnd/2025-05-05 2667719 http://zaguan.unizar.es/record/136056/files/texto_completo.jpg?subformat=icon icon Postprint info:eu-repo/date/embargoEnd/2025-05-05 oai:zaguan.unizar.es:136056 articulos driver 2024-07-31-09:43:55 ARTICLE