Visibility through the gaseous smoke in airborne remote sensing using a DSLR camera

Mirahmad Chabok, Andrew Millington, Jorg M. Hacker, Andrew J. McGrath

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    Visibility and clarity of remotely sensed images acquired by consumer grade DSLR cameras, mounted on an unmanned aerial vehicle or a manned aircraft, are critical factors in obtaining accurate and detailed information from any area of interest. The presence of substantial haze, fog or gaseous smoke particles; caused, for example, by an active bushfire at the time of data capture, will dramatically reduce image visibility and quality. Although most modern hyperspectral imaging sensors are capable of capturing a large number of narrow range bands of the shortwave and thermal infrared spectral range, which have the potential to penetrate smoke and haze, the resulting images do not contain sufficient spatial detail to enable locating important objects or assist search and rescue or similar applications which require high resolution information. We introduce a new method for penetrating gaseous smoke without compromising spatial resolution using a single modified DSLR camera in conjunction with image processing techniques which effectively improves the visibility of objects in the captured images. This is achieved by modifying a DSLR camera and adding a custom optical filter to enable it to capture wavelengths from 480-1200nm (R, G and Near Infrared) instead of the standard RGB bands (400-700nm). With this modified camera mounted on an aircraft, images were acquired over an area polluted by gaseous smoke from an active bushfire. Processed data using our proposed method shows significant visibility improvements compared with other existing solutions.

    Original languageEnglish
    Title of host publicationFourth International Conference on Remote Sensing and Geoinformation of the Environment, RSCy 2016
    EditorsKyriacos Themistocleous, Giorgos Papadavid, Silas Michaelides, Diofantos G. Hadjimitsis
    PublisherSPIE
    ISBN (Print)1628419237, 9781628419238
    DOIs
    Publication statusPublished - Aug 2016
    Event4th International Conference on Remote Sensing and Geoinformation of the Environment, RSCy 2016 - Paphos, Cyprus
    Duration: 4 Apr 20168 Apr 2016

    Publication series

    NameProceedings of SPIE - The International Society for Optical Engineering
    Volume9688
    ISSN (Print)0277-786X
    ISSN (Electronic)1996-756X

    Conference

    Conference4th International Conference on Remote Sensing and Geoinformation of the Environment, RSCy 2016
    CountryCyprus
    CityPaphos
    Period4/04/168/04/16

    Keywords

    • Bushfire mapping
    • Light scattering
    • Smoke penetration
    • Visibility enhancement

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  • Cite this

    Chabok, M., Millington, A., Hacker, J. M., & McGrath, A. J. (2016). Visibility through the gaseous smoke in airborne remote sensing using a DSLR camera. In K. Themistocleous, G. Papadavid, S. Michaelides, & D. G. Hadjimitsis (Eds.), Fourth International Conference on Remote Sensing and Geoinformation of the Environment, RSCy 2016 [96880Q] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 9688). SPIE. https://doi.org/10.1117/12.2241511