Automatic Data Reduction from Aerial Photographs - Phase 1 Report
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1971-08-15
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Edition:Technical report, Jul 1970-Jun 1971
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NTL Classification:NTL-OPERATIONS AND TRAFFIC CONTROLS-Traffic Flow;NTL-HIGHWAY/ROAD TRANSPORTATION-HIGHWAY/ROAD TRANSPORTATION;
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Abstract:Aerial photographs are useful in various studies of highway traffic behavior. From a timed sequence of aerial photographs of a fixed highway area, one can find for each vehicle crossing the area data on position, velocity, trajectory (i.e., entrancing, lane changing, and exiting) and type (i.e., car, truck, or bus). In this project, an interactive system consisting of a computer, computer-controlled flying spot scanner, and a graphics tablet is utilized to significantly automate the data reduction process. This report describes the state-of-the-art of data reduction and the system being developed. The pertinent computer programs developed to date are documented in detail.
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