OcrV1, PascalFrancis, Curation, bibRecord, 000558

Composition of a Dewarped and Enhanced Document Image From Two View Images

Identifieur interne : 000558 ( PascalFrancis/Curation ); précédent : 000557; suivant : 000559

Composition of a Dewarped and Enhanced Document Image From Two View Images

Auteurs : HYUNG IL KOO [Corée du Sud] ; Jinho Kim [Corée du Sud] ; NAM IK CHO [Corée du Sud]

Source :

IEEE transactions on image processing [ 1057-7149 ] ; 2009.

RBID : Pascal:09-0350330

Descripteurs français

Pascal (Inist)
- Traitement image document, Algorithme, Ajustement courbe, Forme cylindrique, Reconnaissance optique caractère, Numérisation, Qualité image, Image floue, Réflexion spéculaire, Méthode graphe, Coupe graphe, Estimation robuste, Traitement image, Reconnaissance forme.
Wicri :
- topic : Numérisation.

English descriptors

KwdEn :
- Algorithm, Blurred image, Curve fitting, Cylindrical shape, Digitizing, Document image processing, Graph cut, Graph method, Image processing, Image quality, Optical character recognition, Pattern recognition, Robust estimation, Specular reflection.

Abstract

In this paper, we propose an algorithm to compose a geometrically dewarped and visually enhanced image from two document images taken by a digital camera at different angles. Unlike the conventional works that require special equipments or assumptions on the contents of books or complicated image acquisition steps, we estimate the unfolded book or document surface from the corresponding points between two images. For this purpose, the surface and camera matrices are estimated using structure reconstruction, 3-D projection analysis, and random sample consensus-based curve fitting with the cylindrical surface model. Because we do not need any assumption on the contents of books, the proposed method can be applied not only to optical character recognition (OCR), but also to the high-quality digitization of pictures in documents. In addition to the dewarping for a structurally better image, image mosaic is also performed for further improving the visual quality. By finding better parts of images (with less out of focus blur and/or without specular reflections) from either of views, we compose a better image by stitching and blending them. These processes are formulated as energy minimization problems that can be solved using a graph cut method. Experiments on many kinds of book or document images show that the proposed algorithm robustly works and yields visually pleasing results. Also, the OCR rate of the resulting image is comparable to that of document images from a flatbed scanner.

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A03		`1`		`@0 IEEE trans. image process.`
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A08	`01`	`1`	`ENG`	`@1 Composition of a Dewarped and Enhanced Document Image From Two View Images`
A11	`01`	`1`		`@1 HYUNG IL KOO`
A11	`02`	`1`		`@1 KIM (Jinho)`
A11	`03`	`1`		`@1 NAM IK CHO`
A14	`01`			`@1 Department of Electrical Engineering and Computer Science and the INMC, Seoul National University @2 Gwanak-gu, Seoul, 151-744 @3 KOR @Z 1 aut. @Z 3 aut.`
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A64	`01`	`1`		`@0 IEEE transactions on image processing`
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C03	`04`	`X`	`ENG`	`@0 Cylindrical shape @5 04`
C03	`04`	`X`	`SPA`	`@0 Forma cilíndrica @5 04`
C03	`05`	`X`	`FRE`	`@0 Reconnaissance optique caractère @5 05`
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C03	`07`	`X`	`FRE`	`@0 Qualité image @5 07`
C03	`07`	`X`	`ENG`	`@0 Image quality @5 07`
C03	`07`	`X`	`SPA`	`@0 Calidad imagen @5 07`
C03	`08`	`X`	`FRE`	`@0 Image floue @5 08`
C03	`08`	`X`	`ENG`	`@0 Blurred image @5 08`
C03	`08`	`X`	`SPA`	`@0 Imagen borrosa @5 08`
C03	`09`	`X`	`FRE`	`@0 Réflexion spéculaire @5 09`
C03	`09`	`X`	`ENG`	`@0 Specular reflection @5 09`
C03	`09`	`X`	`SPA`	`@0 Reflexión especular @5 09`
C03	`10`	`X`	`FRE`	`@0 Méthode graphe @5 10`
C03	`10`	`X`	`ENG`	`@0 Graph method @5 10`
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Le document en format XML

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<fC03 i1="14" i2="X" l="ENG"><s0>Pattern recognition</s0>
<s5>32</s5>
</fC03>
<fC03 i1="14" i2="X" l="SPA"><s0>Reconocimiento patrón</s0>
<s5>32</s5>
</fC03>
<fN21><s1>257</s1>
</fN21>
<fN44 i1="01"><s1>OTO</s1>
</fN44>
<fN82><s1>OTO</s1>
</fN82>
</pA>
</standard>
</inist>
</record>

Pour manipuler ce document sous Unix (Dilib)

EXPLOR_STEP=$WICRI_ROOT/Ticri/CIDE/explor/OcrV1/Data/PascalFrancis/Curation

HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 000558 | SxmlIndent | more

HfdSelect -h $EXPLOR_AREA/Data/PascalFrancis/Curation/biblio.hfd -nk 000558 | SxmlIndent | more

Pour mettre un lien sur cette page dans le réseau Wicri

{{Explor lien
   |wiki=    Ticri/CIDE
   |area=    OcrV1
   |flux=    PascalFrancis
   |étape=   Curation
   |type=    RBID
   |clé=     Pascal:09-0350330
   |texte=   Composition of a Dewarped and Enhanced Document Image From Two View Images
}}

This area was generated with Dilib version V0.6.32.
Data generation: Sat Nov 11 16:53:45 2017. Site generation: Mon Mar 11 23:15:16 2024

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Composition of a Dewarped and Enhanced Document Image From Two View Images

Composition of a Dewarped and Enhanced Document Image From Two View Images

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri