Fostering Interest and Enthusiasm in Literary Appreciation Through Character Mosaics
Yuming Bai; Nobuyuki Umezu, ラスト(シニア)オーサー
International Journal of Information and Education Technology, 2025年08月, ［査読有り］
Immersive Dome Projection: Skywalking Through Iconic Global Destinations
Nobuyuki Umezu; Shun Horie, 筆頭著者
IEEE Int. Conf. on Artificial Intelligence and Virtual Reality (AIxVR) 2025, 2025年01月, ［査読有り］
Lossy Compression of Z-Map Based Shape Models Using Daubechies Wavelet Transform and QuickselectNobuyuki Umezu; Masatomo Inui, 筆頭著者, We propose an algorithm for lossy compression of computer-aided design models in Z-map representation. Our method employs Daubechies wavelet functions, which are smoother than those of the Haar wavelet used in a previous work for the lossy compression of shape models. A significant reduction in the amount of data of the compressed shape model was achieved using the proposed lossy in which the least significant coefficients of the wavelet synopsis were deleted. The nonlinear filtering of coefficients was based on the quickselect algorithm, which was seven to ten times faster than a normal quicksort algorithm and allowed us to accelerate the entire process. We conducted a series of experiments using shape models with 512 × 512–8192 × 8192 resolutions to evaluate our technique using various wavelet functions. The proposed method performed the process in 50–90 ms for the models at 1024 × 1024 resolution and reduced the output binary size by 75%–90% compared with those compressed using a previous method. Some Daubechies wavelets, such as D4 and D6, were found superior in lossy compression using nonlinear filtering based on the order of magnitude of wavelet coefficients., Fuji Technology Press Ltd.
International Journal of Automation Technology, 2024年09月05日,
［査読有り］ Interactive Projection on Objects: Book and Castle Ruin Model Cases in a Museum
Nobuyuki Umezu; Yuto Mori; Keita Yamura, 筆頭著者
Proc. of IEEE AIxVR 2024, 2024年01月, ［査読有り］
Development of Pseudo-3D Representation for Two-Dimensional Artworks Based on Head Tracking and Depth Information
Yuming Bai; Nobuyuki Umezu, ラスト(シニア)オーサー
Proc. of ACM ADIP 2023, 2023年12月, ［査読有り］
Visitor Counting in a Museum With a 2D LiDAR Sensor
Nobuyuki Umezu; Shohei Koizumi, 筆頭著者
Proc. of IEEE GCCE 2023, 2023年10月, ［査読有り］
Similarity-Based Grading Assistance for Assignments in Programming Lecture
Nobuyuki Umezu; Motoki Iwai; HIroto Ito, 筆頭著者
Proc. of IEEE GCCE 2023, 2023年10月, ［査読有り］
Performance in Programming Class and Basic Math Skills
Nobuyuki Umezu; Motoki Iwai; HIroto Ito, 筆頭著者
Proc. of IEEE GCCE 2023, 2023年10月, ［査読有り］
Potential of Low-Cost Light Detection and Ranging (LiDAR) Sensors: Case Studies for Enhancing Visitor Experience at a Science Museum
Nobuyuki Umezu; Shohei Koizumi; Kohki Nakagawa; Saku Nishida, 筆頭著者
Electronics, 2023年07月, ［査読有り］
Graphical Assistance for Determining Cutter Axis Directions in 3+2-Axis Machining
Masatomo Inui; Shutaro Taguchi and Nobuyuki Umezu
CAD and Applications, 2023年01月, ［査読有り］
Tangible User Interface to Learn about Voronoi Diagrams
Nobuyuki Umezu; Satoshi Iijima, 筆頭著者
Proc. of IEEE AIVR 2022, 2022年12月, ［査読有り］
Visualizing Difference between Bodily Movements of Athletes and Users Learning to Play Baseball
Nobuyuki Umezu; Souta Akiyama, 筆頭著者
Proc. of IEEE AIVR 2022, 2022年12月, ［査読有り］
Various Daubechies Wavelets for Compressing Z-map Models
Nobuyuki Umezu; Masatomo Inui, 筆頭著者
Proc. of ICPE 2022, 2022年11月, ［査読有り］
Vectorization of Contours of Hand Written Letters for Character Mosaic Generation
Bai Yuming; Nobuyuki Umezu, ラスト(シニア)オーサー
Proc. of ICPE 2022, 2022年11月, ［査読有り］
Geometric Simulation of 5-axis Milling without Using Cutter Swept Volume
Shogo Iuchi; Masatomo Inui; Nobuyuki Umezu, ラスト(シニア)オーサー
Proc. of ICPE 2022, 2022年11月, ［査読有り］
Floor Projection with QR code-based Interactions and Visitor Drawings
Nobuyuki Umezu; Bai Yuming, 筆頭著者
Proc. of IEEE GCCE 2022, 2022年10月, ［査読有り］
Formulation of Ever Zooming-up Photomosaics
Bai Yuming; Nobuyuki Umezu, ラスト(シニア)オーサー
Proc. of IEEE GCCE 2022, 2022年10月, ［査読有り］
Support for Hand Writing Practice with emphasized Visual Instructions
Natsumi Kako; Nobuyuki Umezu, ラスト(シニア)オーサー
Proc. of IEEE GCCE 2022, 2022年10月, ［査読有り］
Improved Method for Extracting Difficult-to-Machine Shapes Using Multiple Milling Simulation Results
Qi Chen; Masatomo Inui; Nobuyuki Umezu, ラスト(シニア)オーサー
ASME IDETC/CIE 2022, 2022年08月, ［査読有り］
Visualization of Thickness Distribution in Solid Objects
Masatomo Inui; Nao Oki; Nobuyuki Umezu
Proc. of ISFA 2022, 2022年07月, ［査読有り］
Similarity-based Form Visualization for Supporting Sports Instructions
Souta Akiyama; Nobuyuki Umezu
Proc. of IEEE LifeTech2022, 2022年03月, ［査読有り］
Chord-based Visualization of Temporal structure of Symphony
Kentarou Ishikawa; Nobuyuki Umezu
Proc. of IEEE LifeTech2022, 2022年03月, ［査読有り］
Presenting Text Layout and Color Patterns Suitable for Book Covers
Naoki Kametani; Nobuyuki Umezu
Proc. of IEEE LifeTech2022, 2022年03月, ［査読有り］
Comparison of Two Parallel Offsetting Algorithms Free from Conflicts Between Threads
Masatomo Inui; Daiki Ishii; and Nobuyuki Umezu
International Journal of Automation Technology (IJAT), 2021年11月, ［査読有り］
Fast Cutter Accessibility Analysis Using Ray Tracing Cores of GPU
Masatomo Inui; Kohei Kaba; and Nobuyuki Umezu
International Journal of Automation Technology (IJAT), 2021年11月, ［査読有り］
Parallel Contour-Type Cutter Path Computation Using GPU
Issei Watanabe; Masatomo INUI; Nobuyuki UMEZU
Proc. of LEM21 (International Conference on Leading Edge Manufacturing in 21st Century), 2021年11月, ［査読有り］
Learning Environment based on an Interactive Projection Table for Children
Midori Kuwahara; Nobuyuki Umezu, 責任著者
Proc. of IEEE AIVR 2021, 2021年11月, ［査読有り］
Character Mosaics: A New Form of Text-based Artistic Representation
Bai Yuming; Nobuyuki Umezu, 責任著者
Proc. of IEEE AIVR 2021, 2021年11月, ［査読有り］
FAST CUTTER LOCATION SURFACE COMPUTATION USING RAY TRACING CORES
Daiki Ishii; Masatomo Inui; Nobuyuki Umezu
ASME IDETC/CIE 2021, 2021年08月, ［査読有り］
Recipe Recommendation and Cooking Instruction based on Food Material Recognition,
Saki Asahina; Nobuyuki Umezu, ラスト(シニア)オーサー
Proc. of QCAV 2021, 2021年05月, ［査読有り］
Supporting Sports Instruction with Comparative Display of Forms
Sota Akiyama; Nobuyuki Umezu, ラスト(シニア)オーサー
Proc. of QCAV 2021, 2021年05月, ［査読有り］
Webcam-based Categorization of Task Engagement of PC Users at Work
Tadashi Ohara; Nobuyuki Umezu, ラスト(シニア)オーサー
Proc. of QCAV 2021, 2021年05月, ［査読有り］
Parallel offset computation free from conflicts between threads
Daiki Ishi; Masatomo Inui; Nobuyuki Umezu
Proc. of ICPE 2020, 2020年11月, ［査読有り］
Thickness evaluation of solid model in triple-dexel representation
Yu Huang; Masatomo Inui; Nobuyuki Umezu
Proc. of ICPE 2020, 2020年11月, ［査読有り］
Accessibility Map for Assisting Cutter Posture Determination in Five-Axis Mold Machining
Masatomo Inui; Kouhei Nishimiya; Nobuyuki Umezu
Proc. of IEEE CASE 2020, 2020年08月, ［査読有り］
Fast Dexelization of Polyhedral Models Using Ray-Tracing Cores of GPU
Masatomo Inui; Kohei Kaba; Nobuyuki Umezu
Proc. of CAD '20, 2020年07月, ［査読有り］
Pseudo-3D Display based on Head Tracking for Viewpoint Image Generation
Yuki Kubota; Nobuyuki Umezu, 責任著者
Proc. of IEEE GCCE 2019, 2019年10月, ［査読有り］
CLEARANCE MEASUREMENT OF 3D OBJECTS USING ACCESSIBILITY CONE
Masatomo Inui; K. Nishimiya; Nobuyuki Umezu
ASME IDETC/CIE 2019, 2019年08月, ［査読有り］
Milling simulation-based approach for determining optimal milling direction of ejector pin
Tong Zhang; Masatomo Inui; Nobuyuki Umezu
Proc. of I3CDE 2019, 2019年07月, ［査読有り］
GEOMETRIC APPROACH FOR EVALUATING MANUFACTURABILITY OF PARTS PRODUCED WITH INJECTION MOLDING AND DIE CASTING
Masatomo Inui; Nobuyuki Umezu
Proc. of Model Based Enterprise Summit, 2019, 2019年04月, ［査読有り］
Lossy compression with Daubechies wavelet transform for Z-Map Models
Nobuyuki UMEZU; Masatomo INUI
Proc. of ICPE 2018, 2018年11月, ［査読有り］
Detection of Sphere Colliding Step Shape in Automobile Parts
Shun Nikaido; Masatomo Inui; Nobuyuki Umezu
Proc. of ICPE 2018, 2018年11月, ［査読有り］
Support for Keyboard Performing Practice with Mirrored Video of Model Performance
Taisuke Nemoto; Nobuyuki Umezu
Proc. of IEEE GCCE 2018, 2018年10月, ［査読有り］
Development of a Smart Mirror with Life Log Functions and Its Evaluation
Misaki Tani; Nobuyuki Umezu, Best Student Paper Award.
Proc. of IEEE GCCE 2018, 2018年10月, ［査読有り］
RADIAL RAY REPRESENTATION FOR FAST ANALYSIS OF OPTIMAL CUTTING DIRECTION IN 3+2 AXIS MILLING
Masatomo Inui; Shinji Nagano; Nobuyuki Umezu
Proc. of ISFA 2018, 2018年07月, ［査読有り］
Visualization of potential sink marks using thickness analysis of finely tessellated solid model
Masatomo Inui; Shunsuke Onishi; Nobuyuki Umezu
Journal of Computational Design and Engineering, 2018年, ［査読有り］
Rapid Construction of Coarse Indoor Map for Mobile Robots
Eiji Kaneko; Nobuyuki Umezu
Proc. of IEEE GCCE 2017, 2017年10月, ［査読有り］
Fast Extraction of Cutter Engagement Features by Using the Parallel Processing Function of a GPUMasatomo Inui; Masayoshi Kobayashi; Nobuyuki Umezu, 切削加工中に工具の切刃に作用する力の解析は，工具の変形量の評価や送り速度制御による切削効率化のための基礎情報として重要である．この種の解析では，切削シミュレーションにおいて，CEF(Cutter Engagement Feature)と呼ばれる工具と工作物の接触領域を計算する必要がある．高精度な解析のためには，工具が微小移動するたびにCEFを再計算する必要があり，膨大な計算時間が必要となってしまう．本研究では，近年性能向上の著しいGPU(Graphics Processing Unit)の並列処理機能を利用して，CEF計算を高速化する手法を提案する．システムを実装し計算実験により手法の有効性を検証した．, 公益社団法人 精密工学会
Proc. of IEEE CASE 2017, 2017年08月,
［査読有り］ Visualization of Possible Sink Marks using Thickness Analysis of Finely Tessellated Solid Model
Masatomo Inui; Shunsuke Ohnish; Nobuyuki Umezu
Proc. of ACDDE 2017, 2017年08月, ［査読有り］
Photographic Mosaics Maintaining Image Boundaries
Nobuyuki Umezu
Proc. of A-DEWS 2016, 2016年12月, ［査読有り］
Reduction of reworks by detecting possible manufacturing problems of plastic and diecasting parts in early design stage
Masatomo Inui; Nobuyuki Umezu
Proc. of A-DEWS 2016, 2016年12月, ［査読有り］
Photographic Mosaics MaintaThickness Visualization based on Distance Field of 3D Objectsining Image Boundaries
Takuya Iwanami; Masatom Inui; Nobuyuki Umezu
Proc. of ICPE 2016, 2016年11月, ［査読有り］
2D Wavelet Transform Data Compression with Error Level Guarantee for Z-Map Models
Keisuke Yokota; Nobuyuki Umezu; Masatomo Inui
Proc. of A-DEWS 2016, 2016年10月, ［査読有り］
Solid Model Simplification Using Triple Dexel Representation
Masatomo Inui; Nobuyuki Umezu; Masashi Tsukahara
Proc. of ACDDE 2016, 2016年10月, ［査読有り］
Photographic Mosaics Maintaining Image Boundaries
Nobuyuki Umezu
Proc. of ACDDE 2016, 2016年10月, ［査読有り］
GPU-Based Visualization of Knee-Form Contact Area for Safety Inspections
Masatomo Inui; NobuyMasatomo Inui; Shunsuke Nakano; Nobuyuki Umezu; Tetsuya Asanouki Umezu
Proc. of CAD 2016, 2016年06月, ［査読有り］
Contents-based Thumbnailing for Short Video
Kazuki Yuasa; Nobuyuki Umezu
Proc. of ACDDE 2015, 2015年11月, ［査読有り］
Accelerating Thumbnail Generation from JPEG Images
Tatsuya Nakayari; Nobuyuki Umezu
Proc. of ACDDE 2015, 2015年11月, ［査読有り］
Thinning Algorithm of Front Grille Part Shape for Air Flow Analysis
Masatomo Inui; Nobuyuki Umezu; Masahiko Tadaki
Proc. of ACDDE 2015, 2015年11月, ［査読有り］
Extracting Object Position Characteristics from Images on the Web
Fiji Kaneko; Nobuyuki Umezu
Proc. of ACDDE 2015, 2015年11月, ［査読有り］
Computer-Aided Coloring of Monochrome Images
Yuka Kanahama; Nobuyuki Umezu
Proc. of ACDDE 2015, 2015年11月, ［査読有り］
Visualizing Color Term Differences based on Images on the Web
Nobuyuki Umezu; Eriho Takahashi
Proc. of ACDDE 2015, 2015年11月, ［査読有り］
Parallel Distance Field Computation with GPU and Its Application for Evaluating Part Thickness
Masatomo INUI; Nobuyuki UMEZU; and Koudai KOBAYASHI
Proc. of ISFA 2014, 2014年07月, ［査読有り］
Automatic detection of the optimal ejecting direction based on a discrete Gauss map
Masatomo INUI; Nobuyuki UMEZU; Hidekazu Kamei
Proc. of ACDDE 2013, 2013年12月, ［査読有り］
A Comparison of Two GPU Accelerated Geometric Milling Simulation Methods
Masatomo INUI; Nobuyuki UMEZU; and Yuki SHINOZUKA
システム制御情報学会 論文誌, 2013年03月, ［査読有り］
CADモデルへの図形情報付加による製造支援軍司 拓道; 乾 正知; 梅津 信幸, 設計段階にCADモデルを用いて，製品機能だけでなく，製品の加工性や組み立て性を評価することが一般的になっている．これらの作業では，簡易な加工シミュレーションや組み立て解析を行うことが多い．本研究では，このような解析時に用いた図形情報を，CADモデルに積極的に付加し製造工程へ送ることで，後工程の作業を軽減し，製造プロセスの一層の効率化実現を目指す．曲面加工や放電加工用データの作成に有用なデータの付加を例に本研究の考え方を示す．, 公益社団法人 精密工学会
精密工学会学術講演会講演論文集, 2013年
Automatic detection of ejection direction of a part with the minimum undercuts
Masatomo INUI; Hidekazu KAMEI; and Nobuyuki UMEZU
Proc. of ACDDE 2012, 2012年12月, ［査読有り］
Fast Detection of Head Colliding Shapes on Automobile Parts
Masatomo INUI; Nobuyuki UMEZU
Proc. of ACDDE 2012, 2012年12月, ［査読有り］
考古学における遺構実測図のベクトル化アルゴリズム梅津信幸、長谷川修一, The Institute of Image Information and Television Engineers
映像情報メディア学会 論文誌, 2012年07月,
［査読有り］ A Comparison of Two GPU Accelerated Geometric Milling Simulation Methods
Masatomo INUI; Nobuyuki UMEZU; and Yuki SHINOZUKA
Proc. of ISFA 2012, 2012年06月18日, ［査読有り］
Fast Estimation of Milling Result with GPU
Masatomo INUI; Nobuyuki UMEZU; Marie FUSHIMI
Advanced Science Letters, 2012年05月, ［査読有り］
A Hybrid Collision Detection Method for Anti-Crash
Masatomo INUI; Nobuyuki UMEZU; Yuji HASEGAWA
Proc. of ACDDE 2011, 2011年, ［査読有り］
A Dexl Based Algorithm for Evaluating Thickness of Solid Models
Satoru Yamazaki; Nobuyuki Umezu; Masatomo Inui
ACDDE2010, Proc. of Asian Conference of Design & Digital Engineering, 2010年08月27日, ［査読有り］
GPU Acceleration of 5-Axis Milling Simulation in Triple Dexel Representation
Masatom Inui; Nobuyuki Umezu
ISFA2010, Proc. of International Symposium of Flexible Automation, 2010年07月14日, ［査読有り］
