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

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

doi:10.1117/12.2241511

12 August 2016 Visibility through the gaseous smoke in airborne remote sensing using a DSLR camera

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

Proceedings Volume 9688, Fourth International Conference on Remote Sensing and Geoinformation of the Environment (RSCy2016); 96880Q (2016) https://doi.org/10.1117/12.2241511
Event: Fourth International Conference on Remote Sensing and Geoinformation of the Environment, 2016, Paphos, Cyprus

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.

Citation Download Citation

Mirahmad Chabok, Andrew Millington, Jorg M. Hacker, and Andrew J. McGrath "Visibility through the gaseous smoke in airborne remote sensing using a DSLR camera", Proc. SPIE 9688, Fourth International Conference on Remote Sensing and Geoinformation of the Environment (RSCy2016), 96880Q (12 August 2016); https://doi.org/10.1117/12.2241511

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KEYWORDS

Near infrared

Cameras

Visibility

Light scattering

Visibility through fog

Air contamination

Particles

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