Originally published on: December 18, 2018.
In our testing lab, we’re interested in pushing the boundaries of each 3D scanner we can get our hands on. Our goal is to discover best practices and technologies that result in the highest possible scan quality.
For this demonstration, we scanned an organic object with a complex surface topology, a broccoli, in order to show how each of the 3D scanners in Artec’s lineup handle 3D scanning small objects. We left out two of the 3D scanners designed for scanning larger objects (Artec Ray and Leo) and focused on testing Artec Eva, Space Spider, and Micro. In the end, we compared the results to find the best 3D scanner for scanning small objects.
Here are some reasons why we chose broccoli for this test:
- Broccoli has a range of organic shapes and difficult-to-reach areas that are challenging to scan. The florets grow on tree-like branches that stem from larger branches. This results in a fractal pattern with many cavities, which pushes 3D scanners to their limits.
- This is a test to see how a 3D scanner performs when 3D scanning small objects, with particular attention to the level of detail each device can pick up.
- If the scan shows the individual florets on the broccoli heads, this means we are pushing the system’s limits to the max.
The 3D scanners that stepped up to the plate in this broccoli challenge include the following devices. For the test, all the 3D scanners process the scans using Artec Studio 15. It’s currently the latest version of Artec 3D scanning software.
|3D Scanner||Type||Handheld/Desktop?||Technical Specifications|
||All purpose 3D scanner||Handheld
(Point and shoot)
Resolution: 0.2 mm
Accuracy: 0.1 mm
|High-resolution 3D scanner||Handheld
(Point and shoot using blue-light technology)
Resolution: 0.1 mm
Accuracy: 0.05 mm
|Ultra-high-precision metrology-grade 3D scanner||Desktop
Resolution: 0.029 mm
Accuracy: 0.01 mm
Artec Eva (SD vs. HD Mode)
The first contender is the Artec Eva, which is one of the most popular handheld 3D scanners on the market. Its versatility, price point, and scanning results are what makes it an attractive option for anyone looking for a well-rounded, professional 3D scanner.
In the latest version of its scanning software, Artec introduced a new High-Definition Mode (HD) so we wanted to compare the difference between the new HD Mode and the Standard Mode (SD). The new HD mode provides higher resolution scans with dramatic noise reduction—simply by updating to the latest software release (no hardware changes required!)
As you can see from the scan results, using the HD mode provides more detail and sharper definition to the broccoli scan overall.
Although the Artec Eva captures the shape and size of the broccoli perfectly well, the floret details start to get lost as they become clumps, even in the HD mode.The Eva excels at scanning medium-sized objects (such as a motorcycle exhaust system, measurements of the human body, or furniture), but it is not the best option for scanning an object with complex surface topology.
If we’re looking to get more details on the florets, we would need to use a different 3D scanner.
Artec Space Spider
Next up is the Artec Space Spider. This device provides the highest-resolution scans out of all of Artec’s handheld 3D scanners.
After we scanned the broccoli using the Space Spider, you can notice a drastic improvement to the 3D scans compared to the Artec Eva. The individual florets are now distinguishable as finer dots. After scanning the broccoli in its entirety, we also picked off a small stem and scanned it to see if we could capture even more detail.
As you can see from the results, the Space Spider has the ability to render complex geometry, sharp edges, and thin ribs. The 3D scanner uses blue-light technology, which sets this system apart. It’s an ideal solution if you are looking for a portable, metrology-grade 3D scanner. The Artec Space Spider is perfect for capturing small objects with intricate details (such as coins, small bones, or mechanical parts).
While the Artec Space Spider is an excellent option, it’s possible to scan fine details at an even higher quality. Let’s take a look at what the Artec Micro has to offer.
The best performing 3D scanner for scanning the broccoli is the Artec Micro 3D scanner. That’s no surprise as this desktop 3D scanner was designed specifically to scan small, detailed objects. We scanned an even smaller piece of broccoli than the Space Spider to show how much more detail the Micro can capture at such a small size. We magnified the Micro scans for a direct comparison with the Space Spider scans. When compared to the Space Spider scans, the Artec Micro scans show the individual florets, clearly visible and with more definition.
Artec Micro is best at scanning small objects
Results from the test clearly demonstrate that if you want to capture the best scans for small objects, your best option is a macro 3D scanner like the Artec Micro. This type of 3D scanner is designed and engineered to capture the fine details of extremely small objects with high resolution and accuracy.
It’s important to get the right hardware equipment for the size of the object you are scanning to ensure that you get the best scan results.
Choosing Stationary vs. Handheld When 3D Scanning Small Objects
As the results reveal, both the Artec Space Spider and the Artec Micro will do a good job 3D scanning small objects. Depending on how small your object is, sometimes it’s easier to scan a small part using a desktop 3D scanner (like the Artec Micro) versus scanning by hand with a handheld 3D scanner (like the Artec Space Spider). It really depends on the size of your object and the resolution you are looking for. For a lot of applications, the Space Spider does the job. But if you are looking to scan extra small parts or if you want to capture every single detail off a small part, go with the Artec Micro.
For the Artec Eva, HD mode provides better resolution than SD mode with a simple software upgrade.
You can see that even with a simple Artec Studio 3D scanning software upgrade to version 15 using the HD mode, there is a visible difference in terms of the detail you can capture using the same hardware. Just updating the firmware of your 3D scanner can help you get improvements to your scan quality.
Carla Lauter, Editor of Geo Week News, sums up the HD Mode upgrade the best:
“Imagine downloading an update to your computer that enabled its processor to go twice as fast, or downloading an update to your TV that produced a picture twice as sharp.”
Choose a 3D scanner with the field of view that best fits your application.
To get the optimal results out of a 3D scanner, you need to choose a system that is appropriate for the size of the object you are looking to scan. For example, if you are using a knife to cut bread, you would get better results if you use a bread knife than using a butter knife. The same applies for 3D scanners. Once you use the right tool for the job, you will be able to get the results you are looking for.
This reference guide gives indicates which Artec 3D scanner is best at scanning for a particular size of objects.
|3D Scanner||Type||Choose Scanner By Your Object Size|
|Medium-sized Objects (M): Gearboxes, construction equipment, castings, alloy wheels, human body, furniture, statues|
|Small-sized Objects (S): Compressors, small tools, PCBs, keys & coins, fasteners, small archaeological objects, body parts such as ears and jaw bones|
|Extra-Small Sized Objects (XS): Engine valves, connectors, small parts, watch gears & parts, electronic components, human teeth & jewelry|