Abstract book (pdf) - ICPR 2010

Kawanaka, Haruki, Aichi Prefectural Univ.
Fukui, Shinji, Aichi Univ. of Education
Kasugai, Kunio, Aichi Medical Univ.
An endoscope is a medical instrument that acquires images inside the human body. An endoscope carries its own light
source. Classic shape-from-shading can be used to recover the 3-D shape of objects in view. Recent implementations have
used the Fast Marching Method (FMM). Previous FMM approaches recover 3-D shape under assumptions of parallel light
source illumination and orthographic projection. This paper extends the FMM approach to recover the 3-D shape under
more realistic conditions of endoscopy, namely nearby point light source illumination and perspective projection. The new
approach is demonstrated through experiment and is seen to improve performance.
13:30-16:30, Paper TuBCT8.4
Effective Structure-From-Motion for Hybrid Camera Systems
Bastanlar, Yalin, Middle East Tech. Univ.
Temizel, Alptekin, Middle East Tech. Univ.
Yardimci, Yasemin, Middle East Tech. Univ.
Sturm, Peter, INRIA
We describe a pipeline for structure-from-motion with mixed camera types, namely omni directional and perspective cameras.
The steps of the pipeline can be summarized as calibration, point matching, pose estimation, triangulation and bundle
adjustment. For these steps, we either propose improved methods or modify existing perspective camera methods to make
the pipeline more effective and automatic when employed for hybrid camera systems.
13:30-16:30, Paper TuBCT8.5
Single View Metrology Along Orthogonal Directions
Peng, Kun, Peking Univ.
Hou, Lulu, Peking Univ.
Ren, Ren, Peking Univ.
Ying, Xianghua, Peking Univ.
Zha, Hongbin, Peking Univ.
In this paper, we describe how 3D metric measurements can be determined from a single uncalibrated image, when only
minimal geometric information are available in the image. The minimal information just is orthogonal vanishing points.
Given such limited information, we show that the length ratios on different orthogonal directions can be directly computed.
The exciting discovery of the method seems to oppose common senses: Usually, in the calibration process, all edge-lengths
of cuboid are known, in this paper, cuboid edge-lengths are unknown but its edge-lengths ratios can be recovered from
image. 3D metric measurements can be directly computed from the image using our linear method.
13:30-16:30, Paper TuBCT8.6
Depth Perception Model based on Fixational Eye Movements using Bayesian Statistical Inference
Tagawa, Norio, Tokyo Metropolitan Univ.
Small vibrations of eyeball, which occur when we fix our gaze on object, is called ``fixational eye movements.’’ It has
been reported that such the involuntary eye movements work also for monocular depth perception. In this study, we focus
on ``tremor’’ which is the smallest type of fixational eye movement, and construct depth perception model based on tremor
using MAP-EM algorithm. Its effectiveness is confirmed through numerical evaluations using artificial images.
13:30-16:30, Paper TuBCT8.7
One-Shot Scanning using a Color Stripe Pattern
Li, Renju, Peking Univ.
Zha, Hongbin, Peking Univ.
Structured light 3D scanning has many applications such as 3D modeling, animation, motion analysis, deformation measurement
and so on. Traditional structured light methods make use of a sequence of patterns to obtain the dense 3D data of
objects. However, few methods have been proposed to achieve pixel wise reconstruction using one pattern only. In this
- 130 -