Optical characterization and calibration of gastroscope

Chuang-Jan Chang; Jyh-Jong Wei; Hong-Jueng King; Gwo-Jen Jan

doi:10.1117/12.427940

4 June 2001 Optical characterization and calibration of gastroscope

Chuang-Jan Chang, Jyh-Jong Wei, Hong-Jueng King, Gwo-Jen Jan

Proceedings Volume 4254, Biomedical Diagnostic, Guidance, and Surgical-Assist Systems III; (2001) https://doi.org/10.1117/12.427940
Event: BiOS 2001 The International Symposium on Biomedical Optics, 2001, San Jose, CA, United States

Abstract

Endoscopy is a versatile medical device, but with deficiency of severe image distortion from a super-wide angle lens CCD- camera installed. We designed a planar circular pattern target mounted on a XYZ transnational stage and developed a calibration method to correct the distorted image. Through the image shaping similarity and symmetric properties of a circular pad posing in the specific spatial coordinates, an optimized algorithm is to adjust the orientation of the gastroscopic head and the coordinates of the target until the accurate system alignment obtained. The profiles of image mapping and the calibration object are to derive both the image distortion and calibration function as single variable polynomial equations. Using the calibration function, the distorted gastroscopic image could transfer to comply with an ideal pinhole mapping. The experimental results validated that a gastroscopic image could be corrected and depict better geometrical information. Concurrently displaying with the traditional screen, this technique could aid the physician in metering a tumor or lesion size.

Citation Download Citation

Chuang-Jan Chang, Jyh-Jong Wei, Hong-Jueng King, and Gwo-Jen Jan "Optical characterization and calibration of gastroscope", Proc. SPIE 4254, Biomedical Diagnostic, Guidance, and Surgical-Assist Systems III, (4 June 2001); https://doi.org/10.1117/12.427940

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available