no code implementations • 12 Nov 2024 • Andreas Floros, Seyed-Mohsen Moosavi-Dezfooli, Pier Luigi Dragotti
Diffusion models have revolutionized image synthesis, garnering significant research interest in recent years.
no code implementations • 14 Sep 2024 • Herman Verinaz-Jadan, Su Yan, Catherine Higgitt, Pier Luigi Dragotti
Numerical results demonstrate that our method outperforms existing state-of-the-art super-resolution techniques for MA-XRF scans of Old Master paintings.
no code implementations • 15 Apr 2024 • Renke Wang, Francien G. Bossema, Thierry Blu, Pier Luigi Dragotti
By using the divergence theorem, we are able to retrieve the projected vertices of the polyhedron from the sampled tomographic projections, and then we show how to retrieve the 3D object and the projection angles from this information.
no code implementations • 18 Mar 2024 • Siying Liu, Pier Luigi Dragotti
To address this, we propose warping the input intensity frames and sparse codes to enhance reconstruction quality.
no code implementations • 2 Oct 2023 • Jiakang Chen, Di You, Deniz Gündüz, Pier Luigi Dragotti
In this work, we propose CommIN, which views the recovery of high-quality source images from degraded reconstructions as an inverse problem.
1 code implementation • Frontiers in Neuroscience 2023 • Siying Liu, Vincent C. H. Leung, Pier Luigi Dragotti
In the backpropagation, we develop an error assignment method that propagates error from FS times to spikes through a Gaussian window, and then supervised learning for spikes is implemented through a surrogate gradient approach.
no code implementations • 5 Jun 2023 • Di You, Andreas Floros, Pier Luigi Dragotti
With the help of INN, our algorithm effectively estimates the details lost in the degradation process and is no longer limited by the requirement of knowing the closed-form expression of the degradation model.
1 code implementation • IEEE Transactions on Pattern Analysis and Machine Intelligence 2023 • Siying Liu, Pier Luigi Dragotti
In this paper, we propose a light, simple model-based deep network for E2V reconstruction, explore the diversity for adjacent pixels in V2E generation, and finally build a video-to-events-to-video (V2E2V) architecture to validate how alternative event generation strategies improve video reconstruction.
1 code implementation • 16 Dec 2022 • Vincent C. H. Leung, Jun-Jie Huang, Yonina C. Eldar, Pier Luigi Dragotti
While the deep unfolded network achieves similar performance as the classical FRI techniques and outperforms the encoder-decoder network in the low noise regimes, the latter allows to reconstruct the FRI signal even when the sampling kernel is unknown.
no code implementations • 24 Nov 2022 • Ecenaz Erdemir, Tze-Yang Tung, Pier Luigi Dragotti, Deniz Gunduz
In GenerativeJSCC, we carry out end-to-end training of an encoder and a StyleGAN-based decoder, and show that GenerativeJSCC significantly outperforms DeepJSCC both in terms of distortion and perceptual quality.
no code implementations • 31 Oct 2022 • Su Yan, Jun-Jie Huang, Herman Verinaz-Jadan, Nathan Daly, Catherine Higgitt, Pier Luigi Dragotti
Macro X-ray Fluorescence (MA-XRF) scanning is increasingly widely used by researchers in heritage science to analyse easel paintings as one of a suite of non-invasive imaging techniques.
1 code implementation • 12 Mar 2022 • Jun-Jie Huang, Tianrui Liu, Zhixiong Yang, Shaojing Fu, Wentao Zhao, Pier Luigi Dragotti
With the deep unrolling technique, we build the DURRNet with ProxNets to model natural image priors and ProxInvNets which are constructed with invertible networks to impose the exclusion prior.
no code implementations • 11 Feb 2022 • Ecenaz Erdemir, Pier Luigi Dragotti, Deniz Gunduz
For privacy measure, we consider both the probability of correctly detecting the true value of the secret and the mutual information (MI) between the secret and the released data.
no code implementations • 23 Jan 2022 • Wei Pu, Jun-Jie Huang, Barak Sober, Nathan Daly, Catherine Higgitt, Ingrid Daubechies, Pier Luigi Dragotti, Miguel Rodigues
In this paper, we focus on X-ray images of paintings with concealed sub-surface designs (e. g., deriving from reuse of the painting support or revision of a composition by the artist), which include contributions from both the surface painting and the concealed features.
no code implementations • 23 Dec 2021 • Yutong Chen, Carola-Bibiane Schönlieb, Pietro Liò, Tim Leiner, Pier Luigi Dragotti, Ge Wang, Daniel Rueckert, David Firmin, Guang Yang
Compressed sensing (CS) has been playing a key role in accelerating the magnetic resonance imaging (MRI) acquisition process.
no code implementations • 24 Oct 2021 • Pingfan Song, Herman Verinaz Jadan, Carmel L. Howe, Amanda J. Foust, Pier Luigi Dragotti
This paper is devoted to a comprehensive survey to state-of-the-art of computational methods for LFM, with a focus on model-based and data-driven approaches.
no code implementations • 8 Oct 2021 • Ecenaz Erdemir, Pier Luigi Dragotti, Deniz Gunduz
We study privacy-aware communication over a wiretap channel using end-to-end learning.
1 code implementation • 14 Sep 2021 • Jun-Jie Huang, Pier Luigi Dragotti
The proposed WINNet consists of K-scale of lifting inspired invertible neural networks (LINNs) and sparsity-driven denoising networks together with a noise estimation network.
1 code implementation • 7 May 2021 • Jun-Jie Huang, Pier Luigi Dragotti
In this paper, we propose an invertible neural network for image denoising (DnINN) inspired by the transform-based denoising framework.
no code implementations • 10 Mar 2021 • Pingfan Song, Herman Verinaz Jadan, Carmel L. Howe, Peter Quicke, Amanda J. Foust, Pier Luigi Dragotti
Light-field microscopes are able to capture spatial and angular information of incident light rays.
no code implementations • 16 Feb 2021 • Ecenaz Erdemir, Pier Luigi Dragotti, Deniz Gunduz
We consider a user releasing her data containing some personal information in return of a service.
no code implementations • 4 Mar 2020 • Ecenaz Erdemir, Pier Luigi Dragotti, Deniz Gunduz
We measure the privacy leakage by the mutual information between the user's true data sequence and shared version.
no code implementations • 31 Jan 2020 • Jun-Jie Huang, Pier Luigi Dragotti
Inspired by the recent success of deep neural networks and the recent efforts to develop multi-layer dictionary models, we propose a Deep Analysis dictionary Model (DeepAM) which is optimized to address a specific regression task known as single image super-resolution.
no code implementations • 31 Jan 2020 • Jun-Jie Huang, Pier Luigi Dragotti
By exploiting the properties of a convolutional dictionary, we present an efficient convolutional analysis dictionary learning approach.
1 code implementation • ICCV 2019 • Xin Deng, Ren Yang, Mai Xu, Pier Luigi Dragotti
In this paper, we propose a novel method based on wavelet domain style transfer (WDST), which achieves a better PD tradeoff than the GAN based methods.
no code implementations • 9 Oct 2019 • Xin Deng, Pier Luigi Dragotti
In this paper, we propose a novel deep convolutional neural network to solve the general multi-modal image restoration (MIR) and multi-modal image fusion (MIF) problems.
no code implementations • 17 Jul 2019 • Ecenaz Erdemir, Pier Luigi Dragotti, Deniz Gunduz
Existing approaches are mainly focused on privacy of sharing a single location or myopic location trace privacy; neither of them taking into account the temporal correlations between the past and current locations.
Information Theory Cryptography and Security Information Theory
1 code implementation • 8 May 2019 • Roxana Alexandru, Pier Luigi Dragotti
We investigate time encoding as an alternative method to classical sampling, and address the problem of reconstructing non-bandlimited signals from time-based samples.
Signal Processing
1 code implementation • 25 Sep 2017 • Pingfan Song, Xin Deng, João F. C. Mota, Nikos Deligiannis, Pier Luigi Dragotti, Miguel R. D. Rodrigues
This paper proposes a new approach to construct a high-resolution (HR) version of a low-resolution (LR) image given another HR image modality as reference, based on joint sparse representations induced by coupled dictionaries.
no code implementations • 19 May 2017 • Simiao Yu, Hao Dong, Guang Yang, Greg Slabaugh, Pier Luigi Dragotti, Xujiong Ye, Fangde Liu, Simon Arridge, Jennifer Keegan, David Firmin, Yike Guo
Fast Magnetic Resonance Imaging (MRI) is highly in demand for many clinical applications in order to reduce the scanning cost and improve the patient experience.