Faculty Profiles - AMANO Toshiyuki

Conference Activities & Talks -

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Defect Detection Using k‐means Clustering and Eigenspace Outlier Detector

天野敏之

電子情報通信学会技術研究報告 2007.10.18

In this paper, a new approach of defect detection from complex texture patterns that have structural regularity for automated visual inspection is proposed. The approach uses correlation based defect detection, and any kind of model of defect feature is unnecessary. Additionally, proposed method applies k-means clustering to the samples acquired by pixel-by-pixel movement of sampling window, and achieves a very sensitive defect detection. In the experiment, the effectiveness is shown through the experiment by the complex texture patterns that have structural regularity.

コンパクトな辞書データによる高速な3次元物体認識と姿勢推定

木村将之, 天野敏之, 玉木徹, 梅崎太造

電気関係学会東海支部連合大会講演論文集(CD-ROM) 2007.09.14

On the complex and quaternion subspaces for view-based pose estimation

TAMAKI TORU, AMANO TOSHIYUKI, KANEDA KAZUFUMI, ICHIHARA YUMIKO

IPSJ SIG Notes. CVIM 2007.09.03

On the complex and quaternion subspaces for view-based pose estimation

TAMAKI TORU, AMANO TOSHIYUKI, KANEDA KAZUFUMI, ICHIHARA YUMIKO

IEICE technical report 2007.08.27

On the complex and quaternion subspaces for view-based pose estimation

TAMAKI TORU, AMANO TOSHIYUKI, KANEDA KAZUFUMI, ICHIHARA YUMIKO

IEICE technical report 2007.08.27

On the complex and quaternion subspaces for view‐based pose estimation

玉木徹, 天野敏之, 金田和文, 市原由美子

電子情報通信学会技術研究報告 2007.08.27

Projecting images of rotating object onto complex subspace by the matrix of cyclic group and its application

玉木徹, 天野敏之, 金田和文

MIRU 2007 画像の認識・理解シンポジウム論文集 2007.07

This paper proposes a linear map that projects images of an rotating object about anax is onto a complex subspace where the rotation is represented with an simple rotation in one dimensional complex space. First we consider a cyclic group that permutates the image sequence, then construct a complex matrix of the cyclic group by multiplication of low rank matrices. We demonstrate interpolation of the image sequence by rotation in the subspace ,and discuss the ability of the proposed linear map onto the complex subspace.

Projecting images of rotating object onto subspace by block diagonalization of the matrix of cyclic group and its application

玉木徹, 天野敏之, 金田和文

MIRU 2007 画像の認識・理解シンポジウム論文集 2007.07

This paper proposes a linear map that projects images of an rotating object about an axis onto a subspace where the rotation of the object is represented with many simple rotations in two dimensional subspaces. First we consider a cyclic group that permutates the image sequence, then construct a matrix of the cyclic group by multiplication of low rank matrices with block diagonalization. We demonstrate interpolation of the image sequence by rotation in the subspace, and discuss the ability of the proposed linear map onto the subspace.

Prediction of a path of pedestrian using combination of Eigenspace and null space

篠村祐司, 玉木徹, 天野敏之, 金田和文

MIRU 2007 画像の認識・理解シンポジウム論文集 2007.07

This paper proposes a method for Eigenspace-based prediction of a person's path in future with current path. This method uses projection and back projection of the current path onto Eigenspace. However, the prediction does not take the nature of a path of pedestrian and results in non-smooth path. The proposed method modify the prediction by using null vectors in the orthocomplement of the learned Eigenspace and adding linear combinations of the null vectors to the prediction so that the path becomes smooth. Coe?cients of the linear combinations are computed by decent gradient method. Some experimental results on actual pathes are shown.

On a pose estimation in a subspace with block diagonalization of cyclic transient matrix of an image sequence

玉木徹, 天野敏之, 金田和文

MIRU2007 画像の認識・理解シンポジウムダイジェスト 2007.07

Projecting images of rotating object onto complex subspace by the matrix of cyclic group and its application

玉木徹, 天野敏之, 金田和文

MIRU2007 画像の認識・理解シンポジウムダイジェスト 2007.07

On a pose estimation in a subspace with block diagonalization of cyclic transient matrix of an image sequence

玉木徹, 天野敏之, 金田和文

MIRU2007 画像の認識・理解シンポジウム論文集 2007.07

This paper proposes a new method for estimation of pose of a 3D object rotating about an axis by using a subspace with block diagonalization of a cyclic transient matrix of the image sequence of the object. The proposed method searches the pose parameter with the distance between an image and the standard image multiplied with a block diagonal matrix in the subspace. Alternative method that directly estimates the pose parameter as an angle subtended by two vectors in two-dimensional subspace. Experimental results with a real image sequence demon-strate that the maximum estimation error is about 4[deg], and 1.23[deg] in average, which show the effectiveness of the proposed method.

Projecting images of rotating object onto subspace by block diagonalization of the matrix of cyclic group and its application

玉木徹, 天野敏之, 金田和文

MIRU2007 画像の認識・理解シンポジウムダイジェスト 2007.07

3D object recognition for dictionary minimization and high-speed processing

KIMURA Masayuki, AMANO Toshiyuki, TAMAKI Toru, UMEZAKI Taizo

IEICE technical report 2007.05.17

In this paper, a method to recognize 3-D object in parallel is proposed as the improvement of the EbC method that is a parameter estimation solution such as posture of the 3-D objects. The proposed method can realize high-speed object recognition with maintaining small learning data to compares an unknown object image with two image vectors, called EbC image pairs, provided every object by learning. In other words, the proposed method uses the property that projection points of target images are corresponding to circular edge of a plane that generated by EbC image Pair. In recognition experiment, recognition performance of proposed method was verified using COIL-20. Moreover, the effectiveness of the proposal method was considered from comparison with the recognition result in the CLAFIC method that is the method known well conventionally.

3D object recognition for dictionary minimization and high‐speed processing

木村将之, 天野敏之, 玉木徹, 梅崎太造

電子情報通信学会技術研究報告 2007.05.17

Prediction of a path of pedestrian using Eigenspace and correction with the null space

篠村祐司, 玉木徹, 天野敏之, 金田和文

電子情報通信学会技術研究報告 2007.03.08

This paper proposes a method for Eigenspace-based prediction of a person's path in future with current path. This method uses BPLP proposed by Amano et. al.: projection and backprojection of the current path onto Eigenspace. However, the prediction does not take the nature of a path of pedestrian and results in non-smooth path. The proposed method modify the prediction by using null vectors in the orthocomplement of the learned Eigenspace and adding linear combinations of the null vectors to the prediction so that the path becomes smooth. Coefficients of the linear combinations are computed by decent gradient method. Some experimental results on actual pathes are shown.

Virtual Recovery of the Deteriorated Art Object based on AR Technology

Proceedings of Procams 2007 2007

2007 年 PRMU アルゴリズムコンテスト「ジグソーパズルを完成させよう! ―マッチングによる画像復元―」実施報告と受賞アルゴリズム紹介

電子情報通信学会技術報告パターン認識・メディア理解研究会 2007

学習データの最小化と高速処理を目的とした三次元物体認識

電子情報通信学会技術報告パターン認識・メディア理解研究会 2007

An object rotates and images are cyclic: a subspace approach to view-based pose estimation

Proceedings of Subspace 2007 2007

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