Skew detection in document images

Abstract : Skew angle in a document image is estimated using operators known from mathematical morphology. Skew angle in a document image is estimated by run-length smoothing the image and then producing a plurality of eroded run-length-smoothed images. The run-length-smoothed image is eroded using a linear structuring element oriented at each of a plurality of different angles. The angle of the linear structuring element which produces an eroded image having the greatest surface area is designated as the skew angle. A plurality of run-length-smoothed images may be produced, each generated by smoothing the document image using a linear structuring element oriented at a respective different angle. Then each run-length smoothed image is eroded using a linear structuring element oriented at the corresponding angle.
Type de document :
Brevet
France, Patent n° : EP 1 394 725 A1. 2004, pp.16
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https://hal.archives-ouvertes.fr/hal-00715409
Contributeur : Laurent Najman <>
Soumis le : vendredi 6 juillet 2012 - 23:34:15
Dernière modification le : vendredi 6 juillet 2012 - 23:34:15

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  • HAL Id : hal-00715409, version 1

Citation

Laurent Najman. Skew detection in document images. France, Patent n° : EP 1 394 725 A1. 2004, pp.16. <hal-00715409>

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