Analysis and Optical Processing of Sea Photographs for Energy Spectra
- 1 January 1972
- journal article
- research article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Geoscience Electronics
- Vol. 10 (1) , 51-58
- https://doi.org/10.1109/tge.1972.271301
Abstract
An optical Fourier transform analysis of a sea photograph taken under a particular skylight irradiance has been proposed by Stilwell [1] as a means of providing a quantitative description of the sea-vector wave-number spectrum. The process requires an explicit knowledge of the skylight irradiance reflected from the sea surface to the aerial camera. A first-order analysis shows that the photographic density of the transform recording is functionally related to the sea-slope spectrum, provided that the average optical density measured in the sea photographic negative is approximately linear. The analysis of the process and some experimental results are discussed.Keywords
This publication has 5 references indexed in Scilit:
- A laser profilometerJournal of Geophysical Research, 1970
- Directional energy spectra of the sea from photographsJournal of Geophysical Research, 1969
- Directional recording of swell from distant stormsPhilosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 1963
- A Diffraction Analysis of a Photograph of the SeaNature, 1949
- The Polarization of Light at SeaJournal of the Optical Society of America, 1934