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Curved text detection in blurred/non-blurred video/scene images

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Abstract

Text detection in video/images is challenging due to the presence of multiple blur caused by defocus and motion. In this paper, we present a new method for detecting texts in blurred/non-blurred images. Unlike the existing methods that use deblurring or classifiers, the proposed method estimates degree of blur in images based on contrast variations in neighbor pixels and a low pass filter, which results in candidate pixels for deblurring. We consider gradient values of each pixel as the weight for the degree of blur. The proposed method then performs K-means clustering on weighted values of candidate pixels to get text candidates irrespective of blur types. Next, Bhattacharyya distance is used to extract symmetry property of texts to remove false text candidates, which provides text components. Further, the proposed method fixes bounding box for each text component based on the nearest neighbor criteria and direction of the text component. Experimental results on defocus, motion, non-blurred images and standard datasets of curved text show that the proposed method outperforms the existing methods.

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Acknowledgments

The work described in this paper was supported by the Natural Science Foundation of China under Grant No. 61672273 and No. 61272218, and the Science Foundation for Distinguished Young Scholars of Jiangsu under Grant No. BK20160021. This work is also partly supported by University of Malaya under Grant No: UM.0000520/HRU.BK (BKS003-2018).

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Authors and Affiliations

  1. National Key Lab for Novel Software Technology, Nanjing University, Nanjing, China

    Minglong Xue, Chao Zhang & Tong Lu

  2. Faculty of Computer Science and Information Technology, University of Malaya, Kuala Lumpur, Malaysia

    Palaiahnakote Shivakumara

  3. Comp. Vision and Pattern. Recog. Unit, Indian Statistical Institute, Kolkata, India

    Umapada Pal

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  1. Minglong Xue
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  2. Palaiahnakote Shivakumara
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  3. Chao Zhang
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  4. Tong Lu
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  5. Umapada Pal
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Correspondence to Tong Lu.

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Xue, M., Shivakumara, P., Zhang, C. et al. Curved text detection in blurred/non-blurred video/scene images. Multimed Tools Appl 78, 25629–25653 (2019). https://doi.org/10.1007/s11042-019-7721-2

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  • DOI: https://doi.org/10.1007/s11042-019-7721-2

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