ARAGO

Meet Arago, the automated photogrammetry rig developed and manufactured by Rigsters in Copenhagen. It is meant to facilitate the tedious process of capturing optimal dataset for photogrammetry. Its mission is to reach an ultimate one-button solution universal and flexible enough to fit most of our digitalisation needs.

Arago’s main characteristics include portability, flexibility, and speed of capture. Not mentioning the most important aspect – cost-effectiveness. Arago is still a prototype in the beta-testing stage with more features yet to be added to expand the core functionality.

We would be grateful if you share your thoughts to help us better define the future direction of development.

 

Rigsters rig-full-style-1

MAIN FEATURES

SPECIFICATIONS

Physical Dimensions

Rigsters rig-full-style-meas

Rigsters Capturefolded

travel distance

Rigsters rig-travel2

Rigsters z-travel2

Capture volume

Arago is suitable for capturing objects from 1 cm3 up to 1 m3, dependant on the camera+lens combinations. It is possible to capture larger volumes by repositioning the object and using wide angle lenses. Turntable module supports up to 100 kg payload, which can be increased on demand.

Turntable module

The turntable module can work independent of the system and has several different mounting elements for diverse objects. Besides the 360° rotating platform, the module has a secondary moving axis to best suit capturing elongated objects. It increases the capture volume and offers additional camera positioning flexibility.

Rigsters tilt4

Pre-scan

We have included depth cameras for real-time sensing the target object for the process we call pre-scan. This feature generates a rough 3D mesh directly in the software’s 3D interface. This geometry helps generating object shape-specific capture positions. Each new captured object helps improve the algorithms. Due to the complex nature of this feature, it will remain in development with help from beta testers.

Rigsters aragospeed

Construction

The main frame is built from black anodised aluminium that is both lightweight and durable. For all the moving elements we use grease-less Igus linear motion sliders powered by stepper motors from Oriental Motors with Neugard high performance gearboxes. All the cables are harnessed into cable chains to avoid any hanging wires.

Rigsters aragobrains

SOFTWARE

We have decided to use Unity game engine for its capabilities of 3D interface integrations and ability to simulate the physical environment. By having a 3D model of Arago in the scene we are able to simulate the motion sequence in the most accurate way. Pathfinding algorithm finds the fastest route between all the camera positions by using ray tracing and iterating through all the possible paths. Furthermore, it check for out-of-camera-view or unreachable positions that are automatically discarded.

 

Rigsters uibw

Motion Control

Safety

Since Rigsters team is working in close collaboration with Cultural Heritage institutions, safety becomes a very important aspect of Arago. While simulating the motion of the rig, the software constantly checks for any possible collisions with the target object and any additional environment elements (light gear, stands, diffusion panels, etc.). The 3D environment can be easily configured using conventional 3D tools within the software. Hardware failsafe mechanisms are directly implemented within Arago while any occurring malfunctions are being recorded by a logging system for easier troubleshooting.

Camera control

Camera agnostic mode allows Arago to use a modular approach in controlling almost any digital camera. The agnostic mode can be used alongside with the tethering software of your choice. Arago’s software allows specifying the settings and the capture algorithm will dynamically adjust. Synchronized triggering can be done through the camera’s remote control port with configurable focus and shutter pins.

Rigsters aracameras

Rigsters arastack

The software has full integration of Nikon SDK utilizing its functions like live view, dynamic camera settings modifications and file management. To ensure complete focus coverage, focus stacking sequence can be repeated through all the capture positions and adapt to object’s size and orientation. Thousands of photos can be taken automatically without the user having to constantly do manual adjustments.

PERSPECTIVES

We are currently investigating different camera manufacturers SDK support within Arago and will prioritise based on received feedback.

To increase the precision of the capture setup and final 3D mesh we want to integrate a structured light or laser capture module directly in Arago.

We can record all the capture sequence data at the moment, but planning to create smart reporting features allowing for integration with photogrammetry data management solutions like the Cultural Heritage Imaging (CHI) Digital Lab Notebook or other user-specific options.

 

 

CONTACT

STAY TUNED

newsletter signup