A digital image acquisition system for skin lesions

Maglogiannis, I; Kosmopoulos, DI

dc.contributor.author	Maglogiannis, I	en
dc.contributor.author	Kosmopoulos, DI	en
dc.date.accessioned	2014-03-01T02:49:22Z
dc.date.available	2014-03-01T02:49:22Z
dc.date.issued	2003	en
dc.identifier.issn	0277786X	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/34549
dc.subject	Camera calibration	en
dc.subject	Reproducible images	en
dc.subject	Skin lesion inspection	en
dc.subject.other	Calibration	en
dc.subject.other	Cameras	en
dc.subject.other	Color	en
dc.subject.other	Optical filters	en
dc.subject.other	Digital image acquisition	en
dc.subject.other	Image processing	en
dc.title	A digital image acquisition system for skin lesions	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1117/12.480069	en
heal.identifier.secondary	http://dx.doi.org/10.1117/12.480069	en
heal.publicationDate	2003	en
heal.abstract	A major issue concerning the design and implementation of an acquisition system for digital images of skin lesions is the ability of capturing reproducible images. The reproducibility is considered essential for image analysis classification and for the comparison of sequential images during follow-up studies. This paper describes a complete image acquisition system used for the collection of reproducible images of patients having melanoma and compares them with images displaying dysplastic nevus for diagnostic purposes. The system includes a standardized illumination and capturing geometry with polarizing filters and a series of software corrections: Calibration to Black, White, Internal and External camera parameters, Shading correction and Median filtering. The validity of the calibration procedure and the ability of the implemented system to produce reproducible images were tested by capturing sample images in 3 different lighting conditions of the surrounding environment: dark, medium and intense lighting. For each case the average values of the three-color planes RGB and their standard deviations were calculated and the measured error differences ranged between 0,4 and 13,2 (in the 0-255 scale). Preliminary experiments for stereo measurements provided repeatability of about 0.3mm. The above numbers demonstrate the reproducibility of the captured images at a satisfactory level.	en
heal.journalName	Proceedings of SPIE - The International Society for Optical Engineering	en
dc.identifier.doi	10.1117/12.480069	en
dc.identifier.volume	5034	en
dc.identifier.spage	337	en
dc.identifier.epage	343	en