A CARTOGRAPHIC OPTICAL CHARACTER RECOGNITION SYSTEM
Date
1977-05
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ORCID
Type
Degree Level
Masters
Abstract
This thesis describes an Optical Character Recognition system for use in a cartographic application. The system is primarily intended to recog-nize and digitize both machine printed navigational chart sounding values and hand-printed field sheet sounding values.
The system consists of a precision X-Y flatbed transport, a vidicon camera, a PDP 8/e minicomputer, an interactive display console and asso-ciated software and hardware.
After investigating numerous recognition algorithms, three were finally chosen to be included in the system. The final recognition deci-sion was decided by a majority vote. An interactive sounding editing capa-bility was included so that 'unrecognized' soundings could be input manually by the program operator.
The complexity of the problem necessitated the construction of sophis-ticated hardware for both the X-Y transport and the vidicon camera. As well, complete input and output software routines were included to make the system fully integrated.
Experimental results are given for the system.
This research was supported by the United States Naval Oceanographic Office.
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Degree
Master of Science (M.Sc.)
Department
Electrical Engineering