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http://dx.doi.org/10.5392/JKCA.2012.12.01.001

Robust Threshold Determination on Various Lighting for Marker-based Indoor Navigation  

Choi, Tae-Woong (동신대학교 디지털콘텐츠학과)
Lee, Hyun-Cheol (동신대학교 디지털콘텐츠학과)
Hur, Gi-Taek (동신대학교 디지털콘텐츠학과)
Kim, Eun-Seok (동신대학교 디지털콘텐츠학과)
Publication Information
The Journal of the Korea Contents Association / v.12, no.1, 2012 , pp. 1-8 More about this Journal
Abstract
In this paper, a method of determining the optimal threshold in image binarization for the marker recognition is suggested to resolve the problem that the performances of marker recognition are quite different according to the changes of indoor lighting. The suggested method determines the optimal threshold by considering the average brightness, the standard deviation and the maximum deviation of video image under the various indoor lighting circumstances, such as bright light, dim light, and shadow by unspecified obstacles. In particular, the recognition under the gradation lighting by shadow is improved by applying the weighted value that depends on the brightness of image. The suggested method is experimented to process $720{\times}480$ resolution video images under the various lighting environments, and it shows the fast and high performance, which is suitable for mobile indoor navigation.
Keywords
Binarization; Image Processing; Marker Technique; Lighting; Threshold;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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