Comparison of 3D digitization methods of artifacts and product output standards
Comparison of 3D digitization methods of artifacts and product output standards
In the digital age, 3D digitization of artifacts not only helps to store and restore but also creates conditions for promoting cultural heritage widely on digital platforms. Currently, the three most popular methods include: structured light scanners, laser scanners and Photogrammetry.
Each method has its own characteristics, strengths and limitations, requiring careful consideration before applying to each specific type of artifact. So how are these three methods different when applied in practice? Let's analyze in detail!
Comparison of 3D digitization methods in detail
| Criteria | Structured light technology | Blue laser 3D scanner combined with Photogrammetry | Photogrammetry |
| Compatibility with the characteristics of artifacts requiring 3D digitization | Unsuitable because artifacts in the field have inconsistent color surfaces including complex black and gray colors; The black surface will absorb but not reflect the structural light and especially has many deep grooves that cannot be captured. | Suitable for all color surfaces of artifacts and has the ability to rotate in all directions to continuously scan deep grooves. The data results are highly accurate, approved by the latest prestigious international measurement standards such as ISO 10360 and ISO 17025. | Suitable because it is not dependent on the material and surface characteristics of the artifact. The data results have the lowest accuracy. |
| Suitable for the implementation schedule | Not suitable because of slow scanning and model processing speed. The scanning process is not continuous. | Suitable because of the fastest scanning and model processing speed. | Data processing takes a long time due to having to run complex algorithms and is highly dependent on computer performance. |
| Ability to withstand the effects of ambient light | Easily affected by ambient light conditions, 3D digitization needs to be performed in a separate space with a properly controlled lighting system. | Not affected by ambient light, so there is no need to use a separate digitization area. | Not affected. |
From the above analysis, it is proposed to use digitalization technology using a green laser 3D scanner to digitize 3D Artifacts. During the implementation process, it is necessary to pay attention to ensure safety and avoid letting the laser beam shine directly into the eyes.
3D digitized output standards
- Reconstruction file (STL)
Format, size and accuracy
- Format: .stl
- Optimal size: ≤1GB
- Resolution: ≤0.025mm
- Accuracy: ≤0.025mm or better (ISO certified)
Mesh and resolution requirements
- Cleanup, no holes, optimized
- Point mesh created directly during scanning
- Customize resolution without rescanning
- Publication, exhibition file (GLTF)
Format, color and structure
- Format: .gltf
- Color: 24bit, true
- Digitization ratio: 100%
Texture and web display requirements
- Minimum texture: 4K (4096x4096)
- Minimum mesh count: 160k poly
- Suitable for displaying on digital platforms such as web, virtual reality exhibition
Choosing the right 3D digitalization technology for artifacts directly affects the quality, progress and applicability of the product. Among the options, the 3D blue laser scanner technology combined with Photogrammetry is the optimal choice, ensuring both accuracy, speed and flexible application.
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