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A contrast correction method for dental images based on histogram registration

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dc.contributor.author Economopoulos, TL en
dc.contributor.author Asvestas, PA en
dc.contributor.author Matsopoulos, GK en
dc.contributor.author Grondahl, K en
dc.contributor.author Grondahl, H-G en
dc.date.accessioned 2014-03-01T01:32:26Z
dc.date.available 2014-03-01T01:32:26Z
dc.date.issued 2010 en
dc.identifier.issn 0250-832X en
dc.identifier.uri https://dspace.lib.ntua.gr/xmlui/handle/123456789/20130
dc.subject Contrast correction en
dc.subject Dental imaging en
dc.subject Histogram reshaping en
dc.subject Registration en
dc.subject Subtraction radiography en
dc.subject.classification Dentistry, Oral Surgery & Medicine en
dc.subject.classification Radiology, Nuclear Medicine & Medical Imaging en
dc.subject.other algorithm en
dc.subject.other article en
dc.subject.other comparative study en
dc.subject.other human en
dc.subject.other image processing en
dc.subject.other image quality en
dc.subject.other image subtraction en
dc.subject.other methodology en
dc.subject.other statistics en
dc.subject.other theoretical model en
dc.subject.other tooth radiography en
dc.subject.other Algorithms en
dc.subject.other Humans en
dc.subject.other Image Processing, Computer-Assisted en
dc.subject.other Models, Theoretical en
dc.subject.other Radiographic Image Enhancement en
dc.subject.other Radiography, Dental, Digital en
dc.subject.other Subtraction Technique en
dc.title A contrast correction method for dental images based on histogram registration en
heal.type journalArticle en
heal.identifier.primary 10.1259/dmfr/57585722 en
heal.identifier.secondary http://dx.doi.org/10.1259/dmfr/57585722 en
heal.language English en
heal.publicationDate 2010 en
heal.abstract Contrast correction is often required in digital subtraction radiography when comparing medical data acquired over different time periods owing to dissimilarities in the acquisition process. This paper focuses on dental radiographs and introduces a novel approach for correcting the contrast in dental image pairs. The proposed method modifies the subject images by applying typical registration techniques on their histograms. The proposed histogram registration method reshapes the histograms of the two subject images in such a way that these images are matched in terms of their contrast deviation. The method was extensively tested over 4 sets of dental images, consisting of 72 registered dental image pairs with unknown contrast differences as well as 20 dental pairs with known contrast differences. The proposed method was directly compared against the well-known histogram-based contrast correction method. The two methods were qualitatively and quantitatively evaluated for all 92 available dental image pairs. The two methods were compared in terms of the contrast root mean square difference between the reference image and the corrected image in each case. The obtained results were also verified statistically using appropriate t-tests in each set. The proposed method exhibited superior performance compared with the well-established method, in terms of the contrast root mean square difference between the reference and the corrected images. After suitable statistical analysis, it was deduced that the performance advantage of the proposed approach was statistically significant. Dentomaxillofacial Radiology (2010) 39, 300-313. doi: 10.1259/dmfr/57585722 en
heal.publisher BRITISH INST RADIOLOGY en
heal.journalName Dentomaxillofacial Radiology en
dc.identifier.doi 10.1259/dmfr/57585722 en
dc.identifier.isi ISI:000279343500008 en
dc.identifier.volume 39 en
dc.identifier.issue 5 en
dc.identifier.spage 300 en
dc.identifier.epage 313 en


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