Heechul Lim, Kaushik Deb and Kang-Hyun Jo, "Geometrical Reorientation of Distorted Road Sign using Projection Transformation for Road
Sign Recognition"(in Korean), Journal of Institute of Control, Robotics and Systems, Vol. 15, No. 11, pp. 1088-1095, November, 2009.
Andrey Vavilin, Heechul Lim and Kang-Hyun Jo, Robust Road Sign Detection Using Differently Exposed Images, 14th Korea-Japan Joint Workshop on Frontiers of Computer Vision, pp.445-450, Beppu, Oita, Japan 2008.
Heechul Lim and Kang-Hyun Jo, 'A Method of Syllabic Character Recognition for Road Sign Recognition', KRS Conference, pp. 437-438,
Kaushik Deb, Heechul Lim, Kang-Hyun Jo, "Korean Vehicle License Plate Extraction Based on HSI Color Model and Histogram", KSAE 2008
Annual Conference, Page 132, Daejeon, Korea,2008.