Performance evaluation methodology for document image dewarping techniques
Identifieur interne : 000301 ( Main/Exploration ); précédent : 000300; suivant : 000302Performance evaluation methodology for document image dewarping techniques
Auteurs : N. Stamatopoulos [Grèce] ; B. Gatos [Grèce] ; I. Pratikakis [Grèce]Source :
- IET image processing : (Print) [ 1751-9659 ] ; 2012.
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Abstract
The performance evaluation of dewarping techniques is currently addressed by concentrating in visual pleasing impressions or by using optical character recognition (OCR) as a means for indirect evaluation. In this study, the authors present a performance evaluation methodology that calculates a comprehensive evaluation measure which reflects the entire performance of a dewarping technique in a concise quantitative manner. The proposed evaluation measure takes into account the deviation of the dewarped text lines from a horizontal straight reference which is considered to be the optimal result. This measure is expressed by the integral over the dewarped text line curves. To reduce the manual effort for identifying the text lines in the dewarped image, the authors propose a point-to-point matching procedure that finds the correspondence between the manually marked warped document image and the dewarping counterpart. This enables an evaluation for unlimited number of methodologies addressing a marking procedure which is applied only once. The validity of the proposed performance evaluation methodology is demonstrated by a concise experimental work that comprises four state-of-the-art dewarping techniques as well as the involvement of different users in the interactive part of the procedure.
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Stamatopoulos</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>National Centre of Scientific Research 'Demokritos', Institute of Informatics and Telecommunications</s1><s2>15310 Athens</s2><s3>GRC</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>Grèce</country><wicri:noRegion>15310 Athens</wicri:noRegion></affiliation><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Department of Informatics and Telecommunications, National and Kapodistrian University of Athens</s1><s3>GRC</s3><sZ>1 aut.</sZ></inist:fA14><country>Grèce</country><wicri:noRegion>Department of Informatics and Telecommunications, National and Kapodistrian University of Athens</wicri:noRegion></affiliation></author><author><name sortKey="Gatos, B" sort="Gatos, B" uniqKey="Gatos B" first="B." last="Gatos">B. Gatos</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>National Centre of Scientific Research 'Demokritos', Institute of Informatics and Telecommunications</s1><s2>15310 Athens</s2><s3>GRC</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>Grèce</country><wicri:noRegion>15310 Athens</wicri:noRegion></affiliation></author><author><name sortKey="Pratikakis, I" sort="Pratikakis, I" uniqKey="Pratikakis I" first="I." last="Pratikakis">I. Pratikakis</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Department of Electrical and Computer Engineering, Democritus University of Thrace</s1><s2>67100 Xanthi</s2><s3>GRC</s3><sZ>3 aut.</sZ></inist:fA14><country>Grèce</country><wicri:noRegion>67100 Xanthi</wicri:noRegion></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">12-0408135</idno><date when="2012">2012</date><idno type="stanalyst">PASCAL 12-0408135 INIST</idno><idno type="RBID">Pascal:12-0408135</idno><idno type="wicri:Area/PascalFrancis/Corpus">000079</idno><idno type="wicri:Area/PascalFrancis/Curation">000693</idno><idno type="wicri:Area/PascalFrancis/Checkpoint">000063</idno><idno type="wicri:doubleKey">1751-9659:2012:Stamatopoulos N:performance:evaluation:methodology</idno><idno type="wicri:Area/Main/Merge">000304</idno><idno type="wicri:Area/Main/Curation">000301</idno><idno type="wicri:Area/Main/Exploration">000301</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Performance evaluation methodology for document image dewarping techniques</title><author><name sortKey="Stamatopoulos, N" sort="Stamatopoulos, N" uniqKey="Stamatopoulos N" first="N." last="Stamatopoulos">N. Stamatopoulos</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>National Centre of Scientific Research 'Demokritos', Institute of Informatics and Telecommunications</s1><s2>15310 Athens</s2><s3>GRC</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>Grèce</country><wicri:noRegion>15310 Athens</wicri:noRegion></affiliation><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Department of Informatics and Telecommunications, National and Kapodistrian University of Athens</s1><s3>GRC</s3><sZ>1 aut.</sZ></inist:fA14><country>Grèce</country><wicri:noRegion>Department of Informatics and Telecommunications, National and Kapodistrian University of Athens</wicri:noRegion></affiliation></author><author><name sortKey="Gatos, B" sort="Gatos, B" uniqKey="Gatos B" first="B." last="Gatos">B. Gatos</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>National Centre of Scientific Research 'Demokritos', Institute of Informatics and Telecommunications</s1><s2>15310 Athens</s2><s3>GRC</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>Grèce</country><wicri:noRegion>15310 Athens</wicri:noRegion></affiliation></author><author><name sortKey="Pratikakis, I" sort="Pratikakis, I" uniqKey="Pratikakis I" first="I." last="Pratikakis">I. Pratikakis</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Department of Electrical and Computer Engineering, Democritus University of Thrace</s1><s2>67100 Xanthi</s2><s3>GRC</s3><sZ>3 aut.</sZ></inist:fA14><country>Grèce</country><wicri:noRegion>67100 Xanthi</wicri:noRegion></affiliation></author></analytic><series><title level="j" type="main">IET image processing : (Print)</title><title level="j" type="abbreviated">IET image process. : (Print)</title><idno type="ISSN">1751-9659</idno><imprint><date when="2012">2012</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">IET image processing : (Print)</title><title level="j" type="abbreviated">IET image process. : (Print)</title><idno type="ISSN">1751-9659</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Addressing</term><term>Document image processing</term><term>Interactive system</term><term>Optical character recognition</term><term>Pattern recognition</term><term>Performance evaluation</term><term>State of the art</term><term>Warping</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Evaluation performance</term><term>Traitement image document</term><term>Reconnaissance optique caractère</term><term>Gauchissement</term><term>Adressage</term><term>Etat actuel</term><term>Système conversationnel</term><term>Reconnaissance forme</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The performance evaluation of dewarping techniques is currently addressed by concentrating in visual pleasing impressions or by using optical character recognition (OCR) as a means for indirect evaluation. In this study, the authors present a performance evaluation methodology that calculates a comprehensive evaluation measure which reflects the entire performance of a dewarping technique in a concise quantitative manner. The proposed evaluation measure takes into account the deviation of the dewarped text lines from a horizontal straight reference which is considered to be the optimal result. This measure is expressed by the integral over the dewarped text line curves. To reduce the manual effort for identifying the text lines in the dewarped image, the authors propose a point-to-point matching procedure that finds the correspondence between the manually marked warped document image and the dewarping counterpart. This enables an evaluation for unlimited number of methodologies addressing a marking procedure which is applied only once. The validity of the proposed performance evaluation methodology is demonstrated by a concise experimental work that comprises four state-of-the-art dewarping techniques as well as the involvement of different users in the interactive part of the procedure.</div></front></TEI><affiliations><list><country><li>Grèce</li></country></list><tree><country name="Grèce"><noRegion><name sortKey="Stamatopoulos, N" sort="Stamatopoulos, N" uniqKey="Stamatopoulos N" first="N." last="Stamatopoulos">N. Stamatopoulos</name></noRegion><name sortKey="Gatos, B" sort="Gatos, B" uniqKey="Gatos B" first="B." last="Gatos">B. Gatos</name><name sortKey="Pratikakis, I" sort="Pratikakis, I" uniqKey="Pratikakis I" first="I." last="Pratikakis">I. Pratikakis</name><name sortKey="Stamatopoulos, N" sort="Stamatopoulos, N" uniqKey="Stamatopoulos N" first="N." last="Stamatopoulos">N. Stamatopoulos</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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