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Authors: Yuji Iwahori 1 ; Daiki Yamaguchi 2 ; Tsuyoshi Nakamura 2 ; Boonserm Kijsirikul 3 ; M. K. Bhuyan 4 and Kunio Kasugai 5

Affiliations: 1 Chubu University, Japan ; 2 Nagoya Institute of Technology, Japan ; 3 Chulalongkorn University, Thailand ; 4 Indian Institute of Technology Guwahati, India ; 5 Aichi Medical University, Japan

Keyword(s): Shape from Shading, Endoscope, Point Light Source, Perspective Projection, Reflectance Parameter.

Related Ontology Subjects/Areas/Topics: Applications ; Medical Imaging ; Pattern Recognition ; Sensors and Early Vision ; Software Engineering

Abstract: An endoscope is a medical instrument that acquires images inside the human body. In this paper, a new 3-D reconstruction approach is proposed to estimate the size and shape of the polyp under conditions of both point light source illumination and perspective projection. Previous approaches could not know the size of polyp without assuming reflectance parameters as known constant. Even if it was possible to estimate the absolute size of polyp, it was assumed that the parameter of camera movement ∆Z is treated as a known along the depth direction. Here two images are used with a medical suture which is known size object to solve this problem and the proposed approach shows the parameter of camera movement can be estimated with robust accuracy with correspondence between two images taken via slight movement of Z. Experiments with endoscope images are demonstrated to evaluate the validity of proposed approach.

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Paper citation in several formats:
Iwahori, Y.; Yamaguchi, D.; Nakamura, T.; Kijsirikul, B.; Bhuyan, M. and Kasugai, K. (2016). Estimating Reflectance Parameter of Polyp using Medical Suture Information in Endoscope Image. In Proceedings of the 5th International Conference on Pattern Recognition Applications and Methods - ICPRAM, ISBN 978-989-758-173-1; ISSN 2184-4313, SciTePress, pages 503-509. DOI: 10.5220/0005649305030509

@conference{icpram16,
author={Yuji Iwahori. and Daiki Yamaguchi. and Tsuyoshi Nakamura. and Boonserm Kijsirikul. and M. K. Bhuyan. and Kunio Kasugai.},
title={Estimating Reflectance Parameter of Polyp using Medical Suture Information in Endoscope Image},
booktitle={Proceedings of the 5th International Conference on Pattern Recognition Applications and Methods - ICPRAM,},
year={2016},
pages={503-509},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0005649305030509},
isbn={978-989-758-173-1},
issn={2184-4313},
}

TY - CONF

JO - Proceedings of the 5th International Conference on Pattern Recognition Applications and Methods - ICPRAM,
TI - Estimating Reflectance Parameter of Polyp using Medical Suture Information in Endoscope Image
SN - 978-989-758-173-1
IS - 2184-4313
AU - Iwahori, Y.
AU - Yamaguchi, D.
AU - Nakamura, T.
AU - Kijsirikul, B.
AU - Bhuyan, M.
AU - Kasugai, K.
PY - 2016
SP - 503
EP - 509
DO - 10.5220/0005649305030509
PB - SciTePress

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