Geometric processing of hyperspectral image data acquired by VIFIS on board light aircraft

Abstract

The Variable-Interference-Filter Imaging Spectrometer (VIFIS) is an airborne imaging system. Unlike usual airborne spectrometers, the image acquisition of VIFIS is based on 2D sensors with its pixel spatially registered to different passing wavelengths. The correction of perturbations upon the VIFIS platform, required by the hyperspectral image generation, relies solely on the information extracted from the 2D pushbroom image flow. In this paper, we present an analysis of the distortions of the pushbroom scan caused by perturbations upon the platform. Hyperspectral image generation algorithms and band registration methods are also discussed. A practical pre-processing approach is developed to automatically track the displacements and generate up to 64 hyperspectral bands. Finally, a pre-processing example is presented as a demonstration of the overall methodology.

Acknowledgments

This paper is based on some research results of the PhD thesis presented by Y. Gu. Y. Gu acknowledges the University of Dundee for providing a full PhD studentship to support this research. The authors are grateful to Dr Johnathan Monk for acquiring high quality videotape. We also gratefully thank Professor Cracknell, University of Dundee, for providing valuable advice.

Notes

^*Present address: Light Microscopy Lab, Cancer Research UK, 44 Lincoln's Inn Fields, London WC2A 3PX, England, UK; e-mail: [email protected].

^†Present address: The Division of Electronic Engineering and Physics, University of Dundee, Dundee, DD1 4HN, Scotland, UK; e-mail: [email protected].

Additional information

Notes on contributors

Y. Gu*

*Present address: Light Microscopy Lab, Cancer Research UK, 44 Lincoln's Inn Fields, London WC2A 3PX, England, UK; e-mail: [email protected].

J. M. Anderson†

†Present address: The Division of Electronic Engineering and Physics, University of Dundee, Dundee, DD1 4HN, Scotland, UK; e-mail: [email protected].