Direct Dimensions, Inc. has designed and developed PASS: Part Automated Scanning System for high- capacity automated 3D scanning of objects. PASS allows continuous 3D digitization of small objects, parts, artifacts, and collections. The semi-portable scanner system consists of a tower structure with (16) high-resolution DSLR cameras, integrated lights, a custom table and turntable, and a computer controller for operations, metadata, and review.
Objects placed on the turntable are automatically photographed nearly 400 times from different angles over in 2 minutes. The 2D images are then automatically converted into a dimensionally accurate textured 3D mesh model using a process known as photogrammetry. The 3D digital models and object metadata can be uploaded to a database for cataloguing and visualization interactively in 3D. The major system components are:
- Camera tower structure with (16) high-resolution DSLR cameras
- Integrated light system
- Scanning table with turntable and backdrop
- Operator workstation computer
- Data server
- High-speed processing computer
Functional Specifications:
• Maximum object volume: 16” x 16” x 16”
• Accuracy: <1 mm, as low as +/- 10 microns
• Capture time: approx. 2 minutes
• Post-Processing time (unattended, in background): approx. 7 minutes
• Output: OBJ mesh file + JPG texture file + flat-file metadata table
• Additional metadata fields customizable upon request
Physical Specifications:
• System Footprint: 9 ft x 5 ft x 8 ft tall, plus room to stage objects
• Power requirements: One 15-amp AC outlet
• Lighting: System contains integral LED light and texture-projectors
• Environment: Suitable in small room with normal office lighting
• Safety: Turntable emergency-stop; continuous eye-safe lighting
Object Preparation:
• Object limitations: Should be rigid and opaque; and fit in volume
• Object prep: Some shiny or glossy objects may need to be treated
System Workflow:
Steps can be performed asynchronously to optimize workflow
1. Pretreat object (if needed)
2. Stage object on support pegs & fixturing
3. Enter object metadata
4. Scan object (2 min)
5. Process images into 3D model (automatic)
6. Inspect processed models
7. Transfer models to catalogue or other database