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Ohtake-Koyama Lab
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The lab does research in geometric modeling, using 3D data in manufacturing.
AboutAbout the lab
Putting 3D data to work in manufacturing
The Ohtake Lab researches algorithms that put 3D data obtained from CT scans and optical scans to use in industry.
Measuring shapes with high accuracy is a foundational technology for precision manufacturing.
The lab works on shape measurement with X-ray CT, techniques for creating simulation data from the shapes of real objects, and geometric modeling for 3D printing.
The lab works closely with Associate Professor Koyama's lab and operates as the Ohtake-Koyama Lab.
Key terms
- X-ray CT
- A device that directs X-rays at an object from many directions and uses a computer to reconstruct its 3D shape, including the interior.
- Tetrahedral mesh
- Data that divides a solid into a collection of small tetrahedra. It is used to calculate the distribution of strength or temperature.
- Die
- A mold used to form the shape of a product, either by pressing and bending a metal sheet or by pouring molten metal into it.
ResearchResearch themes
The lab researches algorithms for using 3D data obtained from CT scans and optical scans in industry. Its work covers a wide range, from shape measurement to creating data for analysis and supporting product design and manufacturing.
*Illustrative imagePrecise shape measurement with X-ray CT
This research improves the accuracy of 3D scanning with X-ray CT from the software side. The lab works on improving algorithms for extracting shapes and on reducing the noise (artifacts) that appears in CT images.
*Illustrative imageCreating analysis meshes from real objects
So that the strength and temperature of real objects can be analyzed on a computer, the lab studies techniques for creating tetrahedral meshes suited to analysis directly from X-ray CT data. It can also create meshes divided by material.
*Illustrative imageDesign and inspection of ceramic matrix composites
The lab uses geometric modeling to support the design of molded parts made of ceramic matrix composites (CMCs), which are lightweight, heat-resistant, and expected to be used in aircraft. It also develops methods for checking X-ray CT images for defects in the internal woven structure.
*Illustrative imageCorrecting dies with 3D scanning
In pressing and casting, deformation is hard to predict, so dies are made many times and adjusted by hand. To reduce this labor and cost, the lab studies methods for determining die correction amounts from 3D scan data of the processed parts.
MembersFaculty
The Ohtake Lab's members include faculty, technical staff, administrative staff, and doctoral, master's, and undergraduate students.As of 2026
- ProfessorYutaka OhtakePublications ↗
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Input image for 3D scanner” Hesameh / CC BY 4.0 (cropped)
- Precise shape measurement with X-ray CT: “Industrial Computed Tomography - Failures - Void” Jgarant / CC BY-SA 4.0 (cropped)
- Creating analysis meshes from real objects: “Cylindre parallelepipede maillage tetraedrique” Christophe Dang Ngoc Chan (Cdang) / CC BY-SA 3.0 (cropped)
- Design and inspection of ceramic matrix composites: “255-GRC-2002-C-01633 SiC-SiC Silicon carbide fiber reinforced silicon carbide” Photographer: TOM JARES / Public domain (cropped)
- Correcting dies with 3D scanning: “Part to CAD Analysis - 2” Massestephanie / Public domain (cropped)
- Related lab (Graphics and Interaction Lab (Koyama Lab)): “DBW-Render glass scene, recreated in POV-Ray” Morn / CC0 (cropped)
- Related lab (Yamashita-An-Hamada Lab): “Image-Omnidirectional image computer lab” Sgeureka / CC BY-SA 3.0 (cropped)
- Related lab (i-Construction Systems Lab): “Mangere Bridge Construction East Side” Ingolfson / Public domain (cropped)
- Related lab (Morita-Imashiro Lab): “Levitación acústica” Richard Haberkern / CC BY-SA 4.0 (cropped)
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