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Skyline Extraction using a Multistage Edge Filtering

Authors: Byung-Ju Kim, Jong-Jin Shin, Hwa-Jin Nam, Jin-Soo Kim


Skyline extraction in mountainous images can be used for navigation of vehicles or UAV(unmanned air vehicles), but it is very hard to extract skyline shape because of clutters like clouds, sea lines and field borders in images. We developed the edge-based skyline extraction algorithm using a proposed multistage edge filtering (MEF) technique. In this method, characteristics of clutters in the image are first defined and then the lines classified as clutters are eliminated by stages using the proposed MEF technique. After this processing, we select the last line using skyline measures among the remained lines. This proposed algorithm is robust under severe environments with clutters and has even good performance for infrared sensor images with a low resolution. We tested this proposed algorithm for images obtained in the field by an infrared camera and confirmed that the proposed algorithm produced a better performance and faster processing time than conventional algorithms.

Keywords: MEF, mountainous image, navigation, skyline

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[1] Raj Talluri and J, K, Aggarwal, "Position estimation for an autonomous mobile robot in an outdoor environment," IEEE Trans. Robotics and automation, vol. 8, no. 5, pp. 573 ~ 584, 1992.
[2] Scott M. Ettinger, et. al., "Vision-guide flight stability and control for micro air vehicles," Proc. IEEE/RSJ Int-l Conf. Intelligent Robots and System (IROS-02), pp. 2134 ~ 2140, 1993.
[3] Fang, M., Chiu, M.-Y., Liang, C.-C., Singh, "A skyline for video-based virtual rail for vehicle navigation,", Proc. IEEE Int. Sympos. On Intelligent Vehicles, pp. 207 ~ 212, 1993.
[4] Wen-Nung Lie, Tom C.-I. Lin, Ting-Chih Lin, Keng-Shen Hung, "A robust dynamic programming algorithm to extract skyline in images for navigation," Pattern Recognition Letters, vol. 26, pp. 221 ~ 230, 2005.
[5] Ji Hwan Woo and In So Kwen, "Robust horizon and peak extraction for vision-based navigation," IAPR workshop on Machine Vision Applications, 2005.
[6] Sung Woo Yang, Ihn Cheol Kim and Jin Soo Kim, "Robust skyline extraction algorithm for mountainous images," VISAPP (International Conference on Computer Vision Theory and Applications), 2007.
[7] Canny, J., "A computational theory for edge detection," IEEE Trans. On Pattern Recognition and Machine Intelligence, vol. 26, no. 6, pp. 679 ~ 698, 1986.
[8] Forsyth, D. A. and Ponce, J., "Computer vision a modern approach," Prentice Hall, Upper Saddle River, NJ, 2003.