Journal
PATTERN RECOGNITION
Volume 61, Issue -, Pages 650-662Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.patcog.2016.06.008
Keywords
Image enhancement; Natural low-light images; Deep autoencoders
Funding
- Iowa State Regents Innovation Funding
- Rockwell Collins Inc.
- NVIDIA Corporation
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In surveillance, monitoring and tactical reconnaissance, gathering visual information from a dynamic environment and accurately processing such data are essential to making informed decisions and ensuring the success of a mission. Camera sensors are often cost-limited to capture clear images or videos taken in a poorly-lit environment Many applications aim to enhance brightness, contrast and reduce noise content from the images in an on-board real-time manner. We propose a deep autoencoder-based approach to identify signal features from low-light images and adaptively brighten images without over-amplifying/saturating the lighter parts in images with a high dynamic range. We show that a variant of the stacked-sparse denoising autoencoder can learn from synthetically darkened and noise-added training examples to adaptively enhance images taken from natural low-light environment and/or are hardware-degraded. Results show significant credibility of the approach both visually and by quantitative comparison with various techniques. (C) 2016 Elsevier Ltd. All rights reserved.
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