In the digital protection process of cultural relics, high-precision, non-contact 3D data acquisition is an important technical means for establishing……
In the digital preservation workflow of cultural relics,high-precision, non-contact three-dimensional data acquisition is an important technical means for establishing digital archives and conducting subsequent replication. Recently, INSVISION has used the AlphaScan S1 AI metrology-grade 3D scanner to carry out digital acquisition and replication verification work on ancient stone inscription-type cultural relics.
Client Pain Points and Requirements
At digital acquisition sites for stone inscription cultural relics, project execution often faces clear physical and data constraints:
Cultural Relic Body Protection Limitations:The surface of stone inscriptions is typically accompanied by weathering, fissures, and salt efflorescence. The use of physical contact or chemical development processing (such as traditional rubbing) may cause irreversible damage to them; therefore, the acquisition method must be non-contact.
The working environment is not fixed:Cultural relics are often stored in the field, exhibition halls, or temporary warehouses, facing on-site constraints such as the lack of fixed power supply and limited space. The equipment must be portable and capable of rapid deployment to accommodate temporary operations in different environments.
Strict data quality requirements:Cultural relic replication has extremely high fidelity requirements for geometric topology. It must not only capture the overall contour of character strokes but also clearly reflect the cutting tool’s angle and the stone’s weathering texture, ensuring the resulting replicas exhibit minimal tolerance.
Product Solutions
In response to the customer’s stringent data accuracy requirements, INSVISION’s technical engineers adopted the following technical solution during project implementation:
High-Resolution Parameter Setting:To achieve 1:1 information restoration of stone carving details, the engineers set a 0.1 mm resolution; under this setting, the point cloud density on the stele surface can be captured more finely, thereby more completely preserving the microscopic undulation features of the carved character edges and the stone surface;
On-Site Deployment and Operation:The lightweight body design of the equipment reduces hand fatigue during prolonged handheld operation, and the customer can view mesh data generated from the point cloud in real time on site;
Data Processing and Feedback:The proprietary AI algorithm runs in real time during the acquisition process, filtering out ambient light interference and ground substrate background noise, to generate high-purity 3D model data that meets the stringent point cloud integrity requirements for subsequent archiving or modeling.
Core Advantages
Based on this application practice, this scanning solution has the following technical advantages:
Micro-feature analytical capability:At 0.1 mm resolution, the equipment can effectively identify micron-level depth differences. For the subtle depth variations of starting and ending strokes of text on ancient stone inscriptions and the natural spalling marks on the stone surface, geometric reconstruction can be achieved, supporting the feasibility of 1:1 reproduction at the data level;
Environmental operational adaptability:The lightweight body structure allows the team to carry it to sites where fixed power sources or stable workstations are unavailable. Simply connect it to a laptop to begin scanning, significantly lowering the data acquisition threshold in special environments;
Non-destructive data acquisition:Non-contact scanning maintains a physical distance from the cultural relic’s surface during the acquisition process, avoiding secondary physical damage to weathered stone surfaces caused by friction or pressure, in compliance with the “minimum intervention” principle of cultural relic protection;
High data usability:The generated 3D point cloud and mesh models can seamlessly connect with mainstream reverse engineering software and 3D printing software. The data accuracy and detail completeness measured on site meet the engineering standards for subsequent material reproduction and proportional scaling-up/scaling-down output.
