Accession Number : AD0634748

Title :   OCEANOGRAPHIC SPECTRAL PHOTOGRAPHY. PART I. BASIC INVESTIGATIONS.

Descriptive Note : Final rept.,

Corporate Author : VIDYA DIV ITEK CORP PALO ALTO CALIF

Personal Author(s) : Bailey, E. A.

Report Date : 29 APR 1966

Pagination or Media Count : 18

Abstract : This report presents the results of an investigation of the potential value of spectral multiband photography, and multiband imagery in general, for increasing the depth at which underwater objects and/or disturbances can be observed by aerial photography. The program included the collection of multiband photography over a series of selected targets, the special processing of this photography, and the analysis of the resulting displays. Special techniques developed by Itek Corporation for extracting spectral information from multiband photography are described and the results obtained with various techniques are illustrated. The special techniques suppress surface reflections while enhancing spectral differences among submerged objects, resulting in increased depths at which objects of bottom features can be differentiated. The most successful procedure tested made use of four spectral band and comparatively simple masking procedures to suppress surface reflections. The problem of observing subsurface disturbances such as produced by underwater explosions was considered, and theoretical calculations were carried out which indicate a limiting depth of approximately 30 feet for observing such a disturbance under optimum conditions in typical ocean waters. (Author)

Descriptors :   (*MULTIBAND SPECTRAL RECONNAISSANCE, *AERIAL PHOTOGRAPHY), (*OCEANOGRAPHY, MULTIBAND SPECTRAL RECONNAISSANCE), UNDERWATER OBJECTS, OCEAN BOTTOM TOPOGRAPHY, PHOTOGEOLOGY, PHOTOGRAPHY

Subject Categories : Cartography and Aerial Photography
      Physical and Dynamic Oceanography

Distribution Statement : APPROVED FOR PUBLIC RELEASE