Robust distortion correction of endoscope
2008
Endoscopic images suffer from a fundamental spatial distortion due to the wide angle design of the endoscope lens. This
barrel-type distortion is an obstacle for subsequent Computer Aided Diagnosis (CAD) algorithms and should be
corrected. Various methods and research models for the barrel-type distortion correction have been proposed and
studied. For industrial applications, a stable, robust method with high accuracy is required to calibrate the different types
of endoscopes in an easy of use way. The correction area shall be large enough to cover all the regions that the
physicians need to see. In this paper, we present our endoscope distortion correction procedure which includes data
acquisition, distortion center estimation, distortion coefficients calculation, and look-up table (LUT) generation. We
investigate different polynomial models used for modeling the distortion and propose a new one which provides
correction results with better visual quality. The method has been verified with four types of colonoscopes. The
correction procedure is currently being applied on human subject data and the coefficients are being utilized in a
subsequent 3D reconstruction project of colon.
Keywords:
- Correction
- Source
- Cite
- Save
- Machine Reading By IdeaReader
5
References
6
Citations
NaN
KQI