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RELIABILITY OF LENGTHENED OBJECTS DETECTION ALGORITHM
Abstract
This article is devoted to the questions of the reliability and the accuracy of the invented algorithm. Background: The implementation of autonomous navigation system for unmanned airborne vehicle is required for the reliable navigation in case of the instability of the satellite navigation system. Traditionally this problem is solved by the terrain landform navigation system, also the synthetic aperture radar navigation systems could be used as the correction system for the inertial navigation system. Nevertheless, these correction systems do not allow designers to provide necessary stability and reliability of whole system. Therefore, we use lengthened objects as the reference objects, which are stable enough either in different weather seasons. Also these objects (such as roads, rivers, railways) are very often on flat landforms, where the terrain landform navigation system does not work. Methods: We process the amplitude distribution of the reflected signal in order to get the parameter of the algorithm. The obtained distributions could be compared with etalon distributions, which can be computed for various terrain types. Therefore, we can use the intersection area as the indicator of the underlying terrain. This algorithm could be found in previous papers. This paper describes in detail problem of choice necessary counts number for reliable detection of lengthened objects. The suggested solutions allow user to implement this algorithm in the real systems. Also the comparison of the developed algorithm with algorithm based on the Kolmogorov-Smirnov criterion briefly described there. Conclusion: The implementation of the designed algorithm contains resolving of many small but important questions such as choice of necessary counts number of the accuracy of the algorithm. These questions are described in this paper.
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