3 April 1997 Instantaneous wave-vector analysis
Author Affiliations +
Proceedings Volume 3078, Wavelet Applications IV; (1997); doi: 10.1117/12.271747
Event: AeroSense '97, 1997, Orlando, FL, United States
Abstract
2D local spectral information can be obtained form an image using Instantaneous Wavevector (IW). This 2D function is a vector quantity found by taking the gradient of the phase of the analytic image. Several synthetic images will be presented to illustrate the utility of IW analysis, and its application to OH airglow images will be discussed. The IW of an image gives us the dominant wavevector present at any point in the image. The amplitude of the analytic image gives us the magnitude of this component, and the phase differences of the analytic image between successive images allow us to infer the velocity of these waves. This method is used to determine phase velocities of internal waves from Hydroxyl airglow data. The instrument used, UWOSCR, is a scanning radiometer in the near infra-red, taking an 256 pixel image of the OH airglow every minute.
© (1997) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Robert G. Stockwell, Robert P. Lowe, L. Mansinha, "Instantaneous wave-vector analysis", Proc. SPIE 3078, Wavelet Applications IV, (3 April 1997); doi: 10.1117/12.271747; https://doi.org/10.1117/12.271747
PROCEEDINGS
10 PAGES


SHARE
KEYWORDS
Image analysis

Phase velocity

Airglow

Fourier transforms

Signal analyzers

Radiometry

Convolution

RELATED CONTENT

2-D wavelet with position controlled resolution
Proceedings of SPIE (September 23 2005)
Scale and harmonic-type signals
Proceedings of SPIE (October 11 1994)
Generalized Fourier transform processor
Proceedings of SPIE (March 01 1994)

Back to Top