Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/18919
Title: Skew estimation for document images
Authors: YUAN BO
Keywords: document image analysis; skew estimation; fiducial lines; convex hulls; Muff transform; UW-I
Issue Date: 2-Feb-2006
Source: YUAN BO (2006-02-02). Skew estimation for document images. ScholarBank@NUS Repository.
Abstract: This thesis represents the authora??s efforts in developing a series of skew estimation models for document images, which include the fiducial-line based which relies on the existence of text lines, the convex-hull based which relies on the existence of paragraphs or columns, and the straight-edge based which relies on the existence of non-textual components that have straight edges or lines. These models focus on solving some of the major challenges that any skew estimators still have to face today a?? excessive noises in documents, multiple skews with locations, and scanning artifacts such as edges warping and components touching, and so on. The performance of the three models are evaluated using the full set of samples from the University of Washington English Document Image Database I (UW-I). Quantitative and qualitative comparisons are also provided with the works from University of Washington, Xerox PARC, Siemens AG, AT&T Bell Labs, and Hitachi Central Research Lab.
URI: http://scholarbank.nus.edu.sg/handle/10635/18919
Appears in Collections:Ph.D Theses (Open)

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