Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/38013
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dc.contributor.authorLin, H.H.en_US
dc.contributor.author喻石生zh_TW
dc.contributor.authorShu, S.G.en_US
dc.contributor.authorKuo, S.W.en_US
dc.contributor.authorWang, C.H.en_US
dc.contributor.authorChan, Y.P.en_US
dc.contributor.authorYu, S.S.en_US
dc.date2009zh_TW
dc.date.accessioned2014-06-06T08:00:24Z-
dc.date.available2014-06-06T08:00:24Z-
dc.identifier.issn0091-3286zh_TW
dc.identifier.urihttp://hdl.handle.net/11455/38013-
dc.description.abstractBone age assessment of children is a procedure frequently performed in pediatric radiology. The feature extractions of metaphyseal and epiphyseal regions are crucial to automatic bone age assessment. The first step of feature extraction is applying a segmentation scheme to find exact regions of epiphysis and metaphysis. A segmentation method is normally based on both intensity information and the relative location of pixels. There is a fundamental problem; when the intensity contrast of soft tissue and bony tissue is poor, bony and soft tissue cannot easily be separated. We propose an alpha-gamma equalization method to increase the intensity contrast between bony and soft tissue. Sobel, two-means, Canny edge-detection, and watershed methods are applied to illustrate the effect of this method on initial segmentation. Adaptive two-means and gradient vector flow snake are adopted for the final segmentation. Experimental results reveal that alpha-gamma equalization-enhanced two-means initial segmentation with an adaptive two-means clustering scheme can greatly reduce the average error measurements of segmentations. These are evaluated according to the following measurements: misclassification error, edge mismatch, region nonuniformity, relative foreground area eror, and modified Hausdorff distance. Furthermore, the experimental results show that the proposed scheme provides increased stable performance for the segmentation of epiphyseal/metaphyseal regions. (C) 2009 Society of Photo-Optical Instrumentation Engineers. [DOI: 10.1117/1.3242852]en_US
dc.language.isoen_USzh_TW
dc.relationOptical Engineeringen_US
dc.relation.ispartofseriesOptical Engineering, Volume 48, Issue 10.en_US
dc.relation.urihttp://dx.doi.org/10.1117/1.3242852en_US
dc.subjectbone ageen_US
dc.subjectchronological ageen_US
dc.subjectsegmentationen_US
dc.subjectalpha-gamma equalizationen_US
dc.subjecttwo-means clusteringen_US
dc.subjectregion of interesten_US
dc.subjectbone-age assessmenten_US
dc.subjectpyleen_US
dc.titleAlpha-gamma equalization-enhanced hand radiographic image segmentation schemeen_US
dc.typeJournal Articlezh_TW
dc.identifier.doi10.1117/1.3242852zh_TW
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.languageiso639-1en_US-
item.openairetypeJournal Article-
item.grantfulltextnone-
item.fulltextno fulltext-
item.cerifentitytypePublications-
crisitem.author.dept資訊科學與工程學系所-
crisitem.author.parentorg理學院-
Appears in Collections:資訊科學與工程學系所
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