Title :
Correction of distortion in endoscope images
Author :
Smith, Warren E. ; Vakil, Nimish ; Maislin, Seth A.
Author_Institution :
Rochester Univ., NY, USA
fDate :
3/1/1992 12:00:00 AM
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;
Journal_Title :
Medical Imaging, IEEE Transactions on
