GRAPHICAL DATA PROCESSING RESEARCH STUDY AND EXPERIMENTAL INVESTIGATION.
Quarterly progress rept. no. 7, 1 Jan-30 Apr 65,
STANFORD RESEARCH INST MENLO PARK CALIF
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A calculation was made of the positional errors arising from the simple plano-convex lens used as a collimator in the optical preprocessor. The performance is fully adequate to satisfy the demands of the present application. An extensive experimental investigation was carried out on hand-drawn military map symbols. 405 slides were prepared and read by the 100-image preprocessor on three separate days, the intermediate 100-bit code word being recorded from the ternary buffer onto paper tape. A total of 3240 code words were recorded, and subsequent training and analysis tests were made via the tape rather than the preprocessor. A program simulating MINOS II was run in parallel to provide for comparing the results that would have been given by MINOS II if it had been operating perfectly. The following conclusions were drawn 1 the reproducibility of the observed behavior was sufficient to yield meaningful results, 2 the data base was still too small for the training data to be fully representative of the test data, and 3 the particular choice of output codes had a substantial influence on the difficulty of training to a low error rate. Author