Method for radiometric calibration of an endoscope's camera and light source

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

An endoscope is a commonly used instrument for performing minimally invasive visual examination of the tissues inside the body. A physician uses the endoscopic video images to identify tissue abnormalities. The images, however, are highly dependent on the optical properties of the endoscope and its orientation and location with respect to the tissue structure. The analysis of endoscopic video images is, therefore, purely subjective. Studies suggest that the fusion of endoscopic video images (providing color and texture information) with virtual endoscopic views (providing structural information) can be useful for assessing various pathologies for several applications: (1) surgical simulation, training, and pedagogy; (2) the creation of a database for pathologies; and (3) the building of patient-specific models. Such fusion requires both geometric and radiometric alignment of endoscopic video images in the texture space. Inconsistent estimates of texture/color of the tissue surface result in seams when multiple endoscopic video images are combined together. This paper (1) identifies the endoscope-dependent variables to be calibrated for objective and consistent estimation of surface texture/color and (2) presents an integrated set of methods to measure them. Results show that the calibration method can be successfully used to estimate objective color/texture values for simple planar scenes, whereas uncalibrated endoscopes performed very poorly for the same tests.

Original languageEnglish (US)
Title of host publicationMedical Imaging 2008 - Visualization, Image-Guided Procedures, and Modeling
Volume6918
DOIs
StatePublished - Jun 18 2008
EventMedical Imaging 2008 - Visualization, Image-Guided Procedures, and Modeling - San Diego, CA, United States
Duration: Feb 17 2008Feb 19 2008

Other

OtherMedical Imaging 2008 - Visualization, Image-Guided Procedures, and Modeling
CountryUnited States
CitySan Diego, CA
Period2/17/082/19/08

Fingerprint

Endoscopy
Light sources
Textures
Cameras
Calibration
Tissue
Color
Pathology
Fusion reactions
Optical properties

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Rai, L., & Higgins, W. E. (2008). Method for radiometric calibration of an endoscope's camera and light source. In Medical Imaging 2008 - Visualization, Image-Guided Procedures, and Modeling (Vol. 6918). [691813] https://doi.org/10.1117/12.768687
Rai, Lav ; Higgins, William Evan. / Method for radiometric calibration of an endoscope's camera and light source. Medical Imaging 2008 - Visualization, Image-Guided Procedures, and Modeling. Vol. 6918 2008.
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Rai, L & Higgins, WE 2008, Method for radiometric calibration of an endoscope's camera and light source. in Medical Imaging 2008 - Visualization, Image-Guided Procedures, and Modeling. vol. 6918, 691813, Medical Imaging 2008 - Visualization, Image-Guided Procedures, and Modeling, San Diego, CA, United States, 2/17/08. https://doi.org/10.1117/12.768687

Method for radiometric calibration of an endoscope's camera and light source. / Rai, Lav; Higgins, William Evan.

Medical Imaging 2008 - Visualization, Image-Guided Procedures, and Modeling. Vol. 6918 2008. 691813.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Rai L, Higgins WE. Method for radiometric calibration of an endoscope's camera and light source. In Medical Imaging 2008 - Visualization, Image-Guided Procedures, and Modeling. Vol. 6918. 2008. 691813 https://doi.org/10.1117/12.768687