A system for the acquisition of reproducible digital skin lesions images

Maglogiannis, I; Kosmopoulos, DI

dc.contributor.author	Maglogiannis, I	en
dc.contributor.author	Kosmopoulos, DI	en
dc.date.accessioned	2014-03-01T01:52:56Z
dc.date.available	2014-03-01T01:52:56Z
dc.date.issued	2003	en
dc.identifier.issn	09287329	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/26791
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0347003542&partnerID=40&md5=91e3bd4e24e947ee27e8572870aa8e6e	en
dc.subject	Camera calibration	en
dc.subject	Color constancy	en
dc.subject	Image analysis	en
dc.subject	Reproducible images	en
dc.subject	Skin lesion inspection	en
dc.subject	Telemedicine	en
dc.subject.other	analytical error	en
dc.subject.other	article	en
dc.subject.other	biofilter	en
dc.subject.other	color	en
dc.subject.other	computer program	en
dc.subject.other	controlled study	en
dc.subject.other	dermatology	en
dc.subject.other	geometry	en
dc.subject.other	human	en
dc.subject.other	human tissue	en
dc.subject.other	illumination	en
dc.subject.other	image analysis	en
dc.subject.other	image quality	en
dc.subject.other	imaging system	en
dc.subject.other	laboratory test	en
dc.subject.other	light intensity	en
dc.subject.other	mathematical computing	en
dc.subject.other	noise	en
dc.subject.other	polarization	en
dc.subject.other	priority journal	en
dc.subject.other	reproducibility	en
dc.subject.other	skin defect	en
dc.subject.other	stereotypy	en
dc.subject.other	telecommunication	en
dc.subject.other	validation process	en
dc.subject.other	vision	en
dc.subject.other	Greece	en
dc.subject.other	Humans	en
dc.subject.other	Image Processing, Computer-Assisted	en
dc.subject.other	Reproducibility of Results	en
dc.subject.other	Skin Abnormalities	en
dc.subject.other	Telemedicine	en
dc.title	A system for the acquisition of reproducible digital skin lesions images	en
heal.type	journalArticle	en
heal.publicationDate	2003	en
heal.abstract	A major issue concerning the design and implementation of an image acquisition system for skin lesions is its ability to capture reproducible images. The reproducibility is considered essential for image analysis and for the comparison of sequential images during follow-up studies. This paper describes a prototype image acquisition system that includes a standardized illumination and capturing geometry with polarizing filters and a series of software corrections: Calibration to Black, White and Color for color constancy, Internal camera Parameters adjustment and Pose extraction for stereo vision, Shading correction and Noise Filtering for color quality. The validity of the calibration procedure and the images' reproducibility were tested by capturing sample images in three different lighting conditions: dark, medium and intense lighting. For each case the average values of the three color planes RGB and their standard deviations were calculated; the measured error differences ranged between 0.7 and 12.9 (in the 0-255 scale). Preliminary experiments for stereo measurements provided repeatability of about 0.3 mm. The above results demonstrate the reproducibility of the captured images at a satisfactory level. The developed prototype was also evaluated clinically, for its ability to support the construction of knowledge-based decision systems and for telemedicine, thus to support telemedical sessions in dermatology.	en
heal.journalName	Technology and Health Care	en
dc.identifier.volume	11	en
dc.identifier.issue	6	en
dc.identifier.spage	425	en
dc.identifier.epage	441	en