Stereophotogrammetry of the sea surface: an introduction

Mark S. Schmalz

doi:10.1117/12.157136

15 October 1993 Stereophotogrammetry of the sea surface: an introduction

Mark S. Schmalz

Proceedings Volume 1943, State-of-the-Art Mapping; (1993) https://doi.org/10.1117/12.157136
Event: Optical Engineering and Photonics in Aerospace Sensing, 1993, Orlando, FL, United States

Abstract

In this paper, we present an introductory analysis of errors which degrade the accuracy of ocean topography estimation via marine interfacial stereophotogrammetry. We describe the error of range estimation due to parameters such as the sensor range and look angle, sensor footprint geometry, camera SNR (signal-to-noise ratio), as well as image distortions due to atmospheric and in-water scattering and absorption. Additionally, we discus the propagation of such distortions through our disparity computation algorithm, which is based upon the cepstrum of the received stereo pair. Particular attention is given to the problems of periodic ocean wave patterns, correlation between target, background, and surface illumination patterns, as well as sensor configuration. Given synthetic sea surfaces with controlled periodicities, simulated sensor error, and carefully constrained optical distortions, we discuss conditions under which the predicted range error can be held within the design limit of +/- 10 cm at ranges up to 71 meters, under constraint of a 1.5 m sea state and clear air.

Citation Download Citation

Mark S. Schmalz "Stereophotogrammetry of the sea surface: an introduction", Proc. SPIE 1943, State-of-the-Art Mapping, (15 October 1993); https://doi.org/10.1117/12.157136

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