Document Type

Article

Publication Date

1-1-2021

Publication Source

Computer Vision and Image Understanding

Abstract

We present a novel motion-based multiframe image super-resolution (SR) algorithm using a convolutional neural network (CNN) that fuses multiple interpolated input frames to produce an SR output. We refer to the proposed CNN and associated preprocessing as the Fusion of Interpolated Frames Network (FIFNET). We believe this is the first such CNN approach in the literature to perform motion-based multiframe SR by fusing multiple input frames in a single network. We study the FIFNET using translational interframe motion with both fixed and random frame shifts. The input to the network is a sequence of interpolated and aligned frames. One key innovation is that we compute subpixel interframe registration information for each interpolated pixel and feed this into the network as additional input channels. We demonstrate that this subpixel registration information is critical to network performance. We also employ a realistic camera-specific optical transfer function model that accounts for diffraction and detector integration when generating training data. We present a number of experimental results to demonstrate the efficacy of the proposed FIFNET using both simulated and real camera data. The real data come directly from a camera and are not artificially downsampled or degraded. In the quantitative results with simulated data, we show that the FIFNET performs favorably in comparison to the benchmark methods tested.

ISBN/ISSN

1077-3142

Document Version

Postprint

Comments

The document available for download is the authors' accepted manuscript, provided in compliance with the publisher's policy on self-archiving. Permission documentation is on file.

To view the version of record, use the DOI: https://doi.org/10.1016/j.cviu.2020.103097

Publisher

Elsevier

Volume

202

Keywords

Convolutional neural network, Fusion of interpolated frames, Image restoration, Multiframe super-resolution, Subpixel registration, University of Dayton Electro-optics and Photonics

Embargoed until Sunday, January 01, 2023


Share

COinS