Skew Correction of Business Card Images for PDA Application 


Vol. 28,  No. 12, pp. 1225-1238, Dec.  2003


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  Abstract

We present an efficient algorithm for skew correction of business card images obtained by a PDA (personal digital assistant) camera. The proposed method is composed of four parts: block adaptive binarization (BAB), stripe generation, skew angle calculation, and image rotation. In the BAB, an input image is binarized block by block so as to lessen the effect of irregular illumination and shadow over the input image. In the stripe generation, character string clusters are generated merging adjacent characters and their strings, and then only clusters useful for skew angle calculation are output as stripes. In the skew angle calculation, the direction angles of the stripes are calculated using their central moments and then the skew angle of the input image is determined averaging the direction angles. In the image rotation, the input image is ratated by the skew angle. Experimental results shows that the proposed method yields skew correction rates of about 93% for tes images of several types of business cards acquired by a PDA under various surrounding conditions.

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  Cite this article

[IEEE Style]

J. Park, I. Jang, N. Kim, "Skew Correction of Business Card Images for PDA Application," The Journal of Korean Institute of Communications and Information Sciences, vol. 28, no. 12, pp. 1225-1238, 2003. DOI: .

[ACM Style]

Jun-Hyo Park, Ick-Hoon Jang, and Nam-Chul Kim. 2003. Skew Correction of Business Card Images for PDA Application. The Journal of Korean Institute of Communications and Information Sciences, 28, 12, (2003), 1225-1238. DOI: .

[KICS Style]

Jun-Hyo Park, Ick-Hoon Jang, Nam-Chul Kim, "Skew Correction of Business Card Images for PDA Application," The Journal of Korean Institute of Communications and Information Sciences, vol. 28, no. 12, pp. 1225-1238, 12. 2003.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880