A Detection and Recognition Method of Encircled Coded Targets on External Stores Model

Abstract

In order to solve the problem of coded targets matching caused by the roll and split structure of external stores model in wind tunnel, this paper proposed an improved code and decode algorithm based on encircled coded targets with template points. Compared to traditional encircled coded targets, the improved algorithm can realize the fast recognize and high precision match in the complex environment of wind tunnel without opening holes, destroying the aerodynamic shape, changing the strength and stiffness of the structure or increasing the manufacturing cost. The coded targets decode according to the distance relation between the two circular targets, and the angle relation between the circular targets vectors and the template points vectors. The experimental result shows that the recognition accuracy is higher than 98%, the ratio of unrecognized targets is below 2%, and the error rate is almost 0%.