28 December 1998 Vehicle detection and classification using robust shadow feature
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We propose an efficient vehicle detection and classification algorithm using shadow robust feature for an electronic toll collection. The local correlation coefficient between wavelet transformed input and reference images is used as such a feature, which takes advantage of textural similarity. The usefulness of the proposed feature is analyzed qualitatively by comparing the feature with the local variance of a difference image, and is verified by measuring the improvements in the separability of vehicle from shadowy or shadowless road for a real test image. Experimental results from field tests show that the proposed vehicle detection and classification algorithm performs well even under abrupt intensity change due to the characteristics of sensor and occurrence of shadow.
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Chae Whan Lim, Chae Whan Lim, Jong-Sun Park, Jong-Sun Park, Chang-Sup Lee, Chang-Sup Lee, Nam Chul Kim, Nam Chul Kim, } "Vehicle detection and classification using robust shadow feature", Proc. SPIE 3653, Visual Communications and Image Processing '99, (28 December 1998); doi: 10.1117/12.334632; https://doi.org/10.1117/12.334632

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