Estimating ambient visibility in the presence of fog: a deep convolutional neural network approach

Fatma Outay, Bilal Taha, Hazar Chaabani, Faouzi Kamoun, Naoufel Werghi, Ansar Ul Haque Yasar

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


Next-generation intelligent transportation systems are based on the acquisition of ambient data that influence traffic flow and safety. Among these, is the ambient visibility range whose estimation, in the presence of fog, is extremely useful for next-generation intelligent transportation systems. However, existing camera-based approaches are based on “engineered features” extraction methods that use computer algorithms and procedures from the image processing field. In this contribution, a novel approach to estimate visibility range under foggy weather conditions is proposed which is based on “learned features” instead. More precisely, we use AlexNet deep convolutional neural network (DCNN), trained with raw image data, for feature extraction and a support vector machine (SVM) for visibility range estimation. Our quantitative analysis showed that the proposed approach is very promising in estimating the visibility range with very good accuracy. The proposed solution can pave the way towards intelligent driveway assistance systems to enhance awareness of driving weather conditions and hence mitigate the safety risks emanating from fog-induced low visibility conditions.

Original languageBritish English
Pages (from-to)51-62
Number of pages12
JournalPersonal and Ubiquitous Computing
Issue number1
StatePublished - Feb 2021


  • Ambient intelligence
  • Atmospheric visibility
  • Deep convolutional neural networks
  • Intelligent transportation systems
  • Road safety
  • Ubiquitous technologies


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