About 3D scanning

About 3D scanning

In recent years, all things have been converted to 3D data, and the technology has made rapid progress. Currently, technology is competing for 3D data conversion of organic substances with complicated shapes as opposed to inorganic substances with simple structures. This time, I would like to introduce an article that is challenging 3D with its own attempt.

ZOZO, "ZOZOSUIT 2" with high accuracy of 3D body measurement with 50 times marker

ZOZO announced the body suit "ZOZOSUIT 2" for 3D measurement. We are looking for partner companies to create new services together with the foot shape measurement "ZOZOMAT", taking advantage of the high accuracy comparable to 3D laser scanners and the fact that you can easily measure the body in 3D at home using a smartphone. .. [See another image for this article] "ZOZOSUIT 2" has significantly improved the design of the measuring bodysuit "ZOZOSUIT" developed in 2017 and the algorithm for generating 3D models using measurement results. While inheriting the basic measurement method and ease of measurement, it has made it possible to generate a more precise 3D model of the body. Generally, a 3D laser scanner or the like is used to generate an accurate 3D model of the body. The 3D measurement results of ZOZOSUIT 2 have an average error of 3.7 mm compared to the results of the 3D laser scanner, achieving high accuracy. ZOZOSUIT 2 has 20,000 markers (depending on the size of the suit), which is about 50 times the number of markers compared to the old ZOZOSUIT, and the measurement resolution of the markers is also about 50 times. As the amount of information that can be read by the smartphone camera has increased, it has become possible to capture body shape information in more detail, including the curved part. In addition, the marker design has also been changed. In the old ZOZOSUIT, the recognition target was 2 mm dots, but in ZOZOSUIT 2, the recognition target is changed to a 6 mm marker. The recognition has been improved, and more marker information can be captured by the smartphone camera. The algorithm has also been improved. By introducing a technology that corrects movement during shooting and a technology that finally corrects 3D data using contour information, it is possible to generate more precise 3D models. Utilizing ZOZOSUIT2, we envision the development and size recommendation of sportswear and underwear that require more accurate measurement data. In addition, it will seek to utilize it in various fields beyond the boundaries of fashion, such as fitness, preventive medicine, healthcare, games, and entertainment.

What is 3D scanning? Measurement and accuracy of 3D scan (explains drawing and STL)

What is 3D scanning?

3D scanning uses a line laser, digitizer, etc.

It is to measure the object to be measured three-dimensionally (three-dimensional data) instead of two-dimensional image and make it data.

Three-dimensional coordinates are given to the measurement data and arranged in digital space to reproduce the shape.

The device that makes this measurement is called a "three-dimensional measuring machine (3D scanner)".

About 3D scan measurement
Many 3D scans use light such as a laser.

Therefore, products such as target objects

"Glossy" "Black or transparent color" "Light does not reach or diffusely reflects"

Under such conditions, it is extremely difficult to measure as it is.

In such cases, Eisho Metals uses contact-type coordinate measurement that does not use light such as a laser.

We propose the most suitable method according to the "target object" and "purpose" by using a special water-soluble liquid agent.

3D scan accuracy

The accuracy varies depending on the manufacturer and equipment, but

Measuring machines such as line lasers and digitizers are available at the shipping stage of 3D scanning equipment.

It depends on the model, but most of them are based on 20 to 50 μm.

However, there are many that require higher accuracy,

Eisho Metals At our company, "precision required for necessary parts" and high precision fitting parts, etc.

Use a contact-type coordinate measuring machine (system 1 to 2 μm).

In addition, a non-contact 3D scan such as a line laser is used to grasp the overall shape.

Scanning may be performed in multiple stages according to the characteristics of the device.

About 3D scan drawing (drawing)

Based on 3D scan and 3D measured 3D data

3D drawings Create 3D drawings and 2D drawings.

This series of steps is called "reverse engineering" of manufacturing.

Processing and design cannot be performed with the 3D scan data as it is. To convert scan data into drawings, you need to use specialized software and specialized skills.

What is a 3D scan stl?

STL (STL data) is one of the extensions that represent 3D.

The feature of STL is that it is an aggregate of only the shape data of the surface only.

Since the data when 3D scanned is only surface information,

It is generally output as a collection of coordinate values ​​for each point called STL or point cloud.

However, if it is not a solid body with full contents, editing with CAD software or

Depending on the type of data, there are things that can and cannot be done, such as many devices that cannot be processed by CAM.

On the contrary, many 3D printers have to input in STL, but

Can 3D scanned data be used as is with a 3D printer?

The extension is the same, but modeling work such as surface correction and error removal is required.

Therefore, it is almost impossible to output as it is.

About Eisho Metal's 3D scanning service

Eisho Metal's 3D scanning service includes line lasers, digitizers,

We have contact type (copy measurement) and multiple measuring machines.

By selecting the measurement method according to the required accuracy, we can make proposals that other companies cannot.