Correction of distortion in endoscope images

Author

Smith, Warren E. ; Vakil, Nimish ; Maislin, Seth A.

Author_Institution

Rochester Univ., NY, USA

Volume

11

Issue

1

fYear

1992

fDate

3/1/1992 12:00:00 AM

Firstpage

117

Lastpage

122

Abstract

Images formed with endoscopes suffer from a spatial distortion due to the wide-angle nature of the endoscope´s objective lens. This change in the size of objects with position precludes quantitative measurement of the area of the objects, which is important in endoscopy for accurately measuring ulcer and lesion sizes over time. A method for correcting the distortion characteristic of endoscope images is presented. A polynomial correction formula was developed for the endoscope lens and validated by comparing quantitative test areas before and after the distortion correction. The distortion correction has been incorporated into a computer program that could readily be applied to electronic images obtained at endoscopy using a desk-top computer. The research presented here is a key step towards the quantitative determination of the area of regions of interest in endoscopy

Keywords

computerised picture processing; medical diagnostic computing; optical images; computer program; desk-top computer; distortion correction; electronic images; endoscope images; lesion size; objective lens; polynomial correction formula; quantitative area measurement; spatial distortion; ulcer size; Area measurement; Distortion measurement; Endoscopes; Lenses; Lesions; Polynomials; Position measurement; Size measurement; Testing; Time measurement;

fLanguage

English

Journal_Title

Medical Imaging, IEEE Transactions on

Publisher

ieee

ISSN

0278-0062

Type

jour

DOI

10.1109/42.126918

Filename

126918