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A Study on Finding the Rail Space in Elevators Using Matched Filter

  • Journal of The Korea Society of Computer and Information
  • Abbr : JKSCI
  • 2019, 24(6), pp.57-65
  • DOI : 10.9708/jksci.2019.24.06.057
  • Publisher : The Korean Society Of Computer And Information
  • Research Area : Engineering > Computer Science
  • Received : March 28, 2019
  • Accepted : May 29, 2019
  • Published : June 28, 2019

Myong Lyol Song 1

1호서대학교

Accredited

ABSTRACT

In this paper, we study on finding the rail space in elevators by analyzing each image captured with CCD camera. We propose a method that applies one-dimensional matched filter to the pixels of a selected search space in the vertical line at a horizontal position and decides the position with the thickness of the space being represented by a black thick line in captured images. The pattern similarity representing how strongly the associated image pixels resemble with the thick line is defined and calculated with respect to each position along the vertical line of pixels. The position and thickness of the line are decided from the point having the maximum in pattern similarity graph. In the experiments of the proposed method under different illuminational conditions, it is observed that all the pattern similarity graphs show similar shape around door area independent of the conditions and the method can effectively detect the rail space if the rails are illuminated with even weak light. The method can be used for real-time embedded systems because of its simple algorithm, in which it is implemented in simple structure of program with small amount of operations in comparison with the conventional approaches using Canny edge detection and Hough transform.

Citation status

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