File(s) under permanent embargo

Reason: 12 month publisher embargo

Representing Camera Response Function by a Single Latent Variable and Fully Connected Neural Network

journal contribution
posted on 16.09.2022, 10:06 authored by Y Zhao, S Ferguson, K Rafferty, Huiyu Zhou

Modelling the mapping from scene irradiance to image intensity is essential for many com-puter vision tasks. Such mapping is known as the camera response. Most digital camerasuse a nonlinear function to map irradiance, as measured by the sensor to an image inten-sity used to record the photograph. Modelling of the response is necessary for the nonlinearcalibration. In this paper, a new high-performance camera response model that uses a singlelatent variable and fully connected neural network is proposed. The model is produced usingunsupervised learning with an autoencoder on real-world (example) camera responses. Neuralarchitecture searching is then used to find the optimal neural network architecture. A latent dis-tribution learning approach was introduced to constrain the latent distribution. The proposedmodel achieved state-of-the-art CRF representation accuracy in a number of benchmark tests,but is over twice as fast as the best current models when performing the maximum likelihoodestimation during camera response calibration due to the simple yet efficient model representation.

Funding

European Union’s Horizon 2020 research andinnovation program under the Marie-Sklodowska-Curie grant agreement No 720325, FoodSmart-phone

Key Laboratory of Intel-ligent Preventive Medicine of Zhejiang Province2020E10004.

History

Citation

In press

Author affiliation

School of Computing and Mathematical Sciences, University of Leicester

Version

AM (Accepted Manuscript)

Published in

Signal, Image and Video Processing

Publisher

Springer Verlag

issn

1863-1703

Copyright date

2022

Publisher DOI

Language

en