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Green Image
Issue No. 02 - February (2011 vol. 33)
ISSN: 0162-8828
pp: 412-419
Palaiahnakote Shivakumara , National University of Singapore, Singapore
Trung Quy Phan , National University of Singapore, Singapore
Chew Lim Tan , National University of Singapore, Singapore
Abstract—In this paper, we propose a method based on the Laplacian in the frequency domain for video text detection. Unlike many other approaches which assume that text is horizontally-oriented, our method is able to handle text of arbitrary orientation. The input image is first filtered with Fourier-Laplacian. K--means clustering is then used to identify candidate text regions based on the maximum difference. The skeleton of each connected component helps to separate the different text strings from each other. Finally, text string straightness and edge density are used for false positive elimination. Experimental results show that the proposed method is able to handle graphics text and scene text of both horizontal and nonhorizontal orientation.
Connected component analysis, frequency domain processing, text detection, text orientation.

T. Q. Phan, C. L. Tan and P. Shivakumara, "A Laplacian Approach to Multi-Oriented Text Detection in Video," in IEEE Transactions on Pattern Analysis & Machine Intelligence, vol. 33, no. , pp. 412-419, 2010.
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