Accession Number:

AD0900456

Title:

Photogrammetric Image Dissector Scanner Study.

Descriptive Note:

Final rept. Dec 70-Dec 71,

Corporate Author:

BENDIX RESEARCH LABS SOUTHFIELD MI

Personal Author(s):

• Kowalski, Daniel C.
• Huckins, R. J.
• Matle, C. C.
• Windrich, D. W.

Report Date:

1972-05-01

Pagination or Media Count:

119.0

Abstract:

A study and investigation were conducted to determine the feasibility of applying the image dissector tube to image scanning in stereophotogrammetric instruments such as the AS-11B-1 automated analytical stereoplotter. The main objectives of this work were to compare the performance of the image dissector scanner with the present flying-spot scanner in the AS-11B-1 system and to determine the advantages and feasibility of applying coherent optical contrast enhancement to improve the image dissector performance. The study and investigation involved work with a breadboard image dissector scanner system. The results of the study and investigation showed that an image dissector scanner system can be designed to meet the AS-11B-1 system specifications and outperform the flying-spot scanner in areas of high average image density. The coherent optical technique of contrast enhancement proved to be unfeasible, mainly due to the large laser power requirements and the unavailability of a controllable variable spatial filter for altering the background intensity. In general, the image dissector scanner is a more versatile scanner than the flying-spot scanner because it is not restricted operationally by the light source. Author

Descriptors:

• *STEREOSCOPIC MAP PLOTTERS
• OPTICAL SCANNING
• PHOTOGRAMMETRY
• PHOTOGRAPHIC IMAGES
• AUTOMATION
• PHOTOMULTIPLIER TUBES
• LASERS
• IMAGE TUBES
• OPERATION
• PERFORMANCE(ENGINEERING)

Subject Categories:

• Cartography and Aerial Photography
• Electrooptical and Optoelectronic Devices

Distribution Statement:

APPROVED FOR PUBLIC RELEASE