title: Recovering 3D Shape with Absolute Size from Endoscope Images Using RBF Neural Network.
abstract: Medical diagnosis judges the status of polyp from the size and the 3D shape of the polyp from its medical endoscope image. However the medical doctor judges the status empirically from the endoscope image and more accurate 3D shape recovery from its 2D image has been demanded to support this judgment. As a method to recover 3D shape with high speed, VBW (Vogel-Breuß-Weickert) model is proposed to recover 3D shape under the condition of point light source illumination and perspective projection. However, VBW model recovers the relative shape but there is a problem that the shape cannot be recovered with the exact size. Here, shape modification is introduced to recover the exact shape with modification from that with VBW model. RBF-NN is introduced for the mapping between input and output. Input is given as the output of gradient parameters of VBW model for the generated sphere. Output is given as the true gradient parameters of true values of the generated sphere. Learning mapping with NN can modify the gradient and the depth can be recovered according to the modified gradient parameters. Performance of the proposed approach is confirmed via computer simulation and real experiment.
authors.affiliation: Department of Computer Science, Chubu University, 1200 Matsumotocho, Kasugai 487-8501, Japan.
authors.forename: Seiya
authors.initials: S
authors.lastname: Tsuda
authors.affiliation: Department of Computer Science, Chubu University, 1200 Matsumotocho, Kasugai 487-8501, Japan.
authors.forename: Yuji
authors.initials: Y
authors.lastname: Iwahori
authors.affiliation: Department of Electronics and Electrical Engineering, IIT Guwahati, Guwahati 781039, India.
authors.forename: M K
authors.initials: MK
authors.lastname: Bhuyan
authors.affiliation: Department of Computer Science, University of British Columbia, Vancouver, BC, Canada V6T 1Z4.
authors.forename: Robert J
authors.initials: RJ
authors.lastname: Woodham
authors.affiliation: Department of Gastroenterology, Aichi Medical University, 1-1 Karimata, Yazako, Nagakute 480-1195, Japan.
authors.forename: Kunio
authors.initials: K
authors.lastname: Kasugai