LNNet : Lightweight Nested Network for motion deblurring

Cai GUO, Qian WANG, Hong-Ning DAI*, Hao WANG, Ping LI

*Corresponding author for this work

Research output: Journal PublicationsJournal Article (refereed)peer-review

2 Citations (Scopus)


Motion deblurring methods based on convolutional neural networks (CNN) have recently demonstrated their advantages over conventional methods. However, repetitions of scaling or slicing operations of these methods on the input images inevitably lead to spatial information loss. Meanwhile, some recent methods based on complex models inevitably bring a large model size and huge computing cost. It is still challenging to balance the deblurring performance and the cost. To this end, we propose a lightweight nested network (LNNet) for the motion-deblurring task. Our LNNet leverages several simple yet efficient sub-networks to process motion deblurring features at each stage. We design a nested connection, which is conducive to the model size reduction when connecting sub-networks so as to reuse deblurring information and facilitate deblurring information diversity. Meanwhile, we introduce the feature-fusion module to improve deblurring performance further. We perform extensive experiments on a workstation platform and an embedded mobile edge computing (MEC) platform to evaluate our LNNet as well as other existing methods. Extensive experimental results demonstrate that our LNNet achieves superior deblurring performance than state-of-the-art methods with a small model size within a short running time. Moreover, experimental results also show that our model is quite suitable for other embedded devices.
Original languageEnglish
Article number102584
Pages (from-to)102584
JournalJournal of Systems Architecture
Early online date1 Jun 2022
Publication statusPublished - Aug 2022

Bibliographical note

Funding Information:
The work described in this paper was partially supported by Science and Technology Planning Project of Guangdong Province, China ( 2022A1515011551 , GDKTP202004920 , 2017A04040506 3, 2015B090922014 ), Research Project of Guangdong Provincial Department of Education ( 2021KTSCX07 ), Doctor Starting Fund of Hanshan Formal University, China ( QD20190628 ), Macao Science and Technology Development Fund under Macao Funding Scheme for Key R & D Projects ( 0025/2019/AKP ), a grant from the International Cooperation Project of Guangdong Province (Project No: 2021A0505030017 ), and in part by the Hong Kong Polytechnic University under Grant P0030419 and Grant P0035358 .

Publisher Copyright:
© 2022 Elsevier B.V.


  • Lightweight AI model
  • Nested neural network
  • Motion deblurring
  • Mobile edge computing


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