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ANGLE-PROXIMITY BASED TEXT BLOCK VERIFICATION METHOD FOR TEXT DETECTION IN SCENE IMAGES

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Author(s): BASAVANNA M, SHIVAKUMARA P, SRIVATSA S.K, HEMANTHA KUMAR G.,

Journal: International Journal of Machine Intelligence
ISSN 0975-2927

Volume: 3;
Issue: 4;
Start page: 245;
Date: 2011;
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Keywords: Scene text detection | Angle computation | Proximity estimation | Text block verification.

ABSTRACT
Text block verification is important in enhancing the text detection accuracy in natural scene images because it is hard to develop general or objective heuristics to differentiate text and non-text block. In this paper, we propose new objective heuristics to verify the blocks detected by the text detection method based on angle information and proximity of the blocks. The angle for the detected block is computed using PCA to find the direction of the text block. In the same way, the proximity between pixels in the detected block is estimated to find closeness between pixels. Then the method combines these two heuristics to verify the text block to obtain a better result. We conduct experimental results on different databases to show that the performance of the text detection method increases in terms of recall, precision and f-measure with the text block verification methods. The database includes benchmark database ICDAR-2003 competition data, our own data captured by high resolution camera and captured by low resolution mobile camera.
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Tango Jona
Tangokurs Rapperswil-Jona