Rectification of Distorted Document Images Using Variants, Invariants and Normalization
Journal
Proceedings of MIRU 2008
Presentation number
IS4-22
Pages
pp.1260-1265
Reviewed
Not reviewed
Date
July 2008
Research fields
Document Image Analysis
Key
Niwa2008 (id=1032)
Abstract
For user convenience, document image processing captured with a digital camera instead of a scanner
has been researched. However, existing methods of document image processing are not usable for a perspectively
distorted document image because most of them require a neat image captured by a scanner. Thus, we have to
rectify perspective distortion of document images. For the purpose, we have proposed a layout free rectification
method based on variants and invariants. In this paper, we reports two improvements on the method. The first one
is to increase the stability of the method. The second one is to eliminate remaining affine distortions using prior
knowledge. We confirm the effectiveness of the improvements by experiments.
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