How Does 3D Scanner Resolution Affect 3D Scan Data?

The resolution of a 3D scanner has a big effect on 3D scan data. To process scan data into 3D solid data that matches the sample accurately, you need both high resolution and high accuracy from the 3D scanner.

3D scan data from an ATOS Core 3D scanner

What is 3D scanner resolution?

The resolution of a 3D scanner is the number of points it captures in a single shot (one capture). For example, a scanner with 3 MP resolution (the OptimScan 3M 3D scanner) captures 3 million points from the sample in each shot to build 3D data in .STL or .OBJ format.

What is 3D scan data processing?

3D scan data processing, also called reverse engineering, is the process of using software to convert (retrace) 3D scan data (.STL, .OBJ) into surface and solid data that can be edited, or programmed cleanly for CNC machining in CAM software without errors.

For wood carving (wood CNC), the 3D scan data (.STL, .OBJ) can be used directly in specialized software such as JDPaint or ZBrush.

If the scan data is sharp (captured with a high-resolution 3D scanner), the mesh is dense per unit area. Redrawing, retracing, or processing the 3D scan data then becomes more accurate and simpler. It is also affected by how accurate the scan data is compared with the sample, but scanner resolution is still a fairly important factor.

Building solid data from 3D scan data

Conclusion:

High accuracy in 3D scan data processing depends on several factors:

The accuracy of the 3D scanner.
The resolution of the 3D scanner.
The judgment and experience of the design engineer.

Of these, scanner resolution plays a fairly important role. If you plan to invest in a 3D scanner, pay close attention to it. If you need advice, contact me at the number below.

Best regards!

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Frequently asked questions

Does high resolution mean high accuracy?

No. Resolution is the density of captured points and determines the level of detail; accuracy is how far the dimensions deviate from the real object. A scanner can produce very sharp data and still be off if it is poorly calibrated.

When do you need a high-resolution 3D scanner?

You need high resolution when scanning small, detailed objects such as jewelry, ornamental patterns, engraved text, teeth or sharp edges on mechanical parts. For large objects with simple surfaces, moderate resolution is enough.

What are the downsides of very high-resolution scan data?

The files get very heavy, need a powerful computer and slow down processing and reverse engineering. It is usually best to choose a resolution that is just enough for the purpose.

How do you get good scan data for reverse engineering?

Use a scanner with suitable accuracy, calibrate it before scanning, treat glossy surfaces and place markers correctly. Scanning all the datum faces and mating features helps build a more accurate CAD model.

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