Photogrammetry technology (NJK)

Photogrammetry technology

Photogrammetry technology enables mechanical engineers to create precise 3D models from photographs, revolutionizing reverse engineering and quality control. This non-contact method analyzes overlapping images to extract geometric data, making it ideal for complex parts in manufacturing.

​Key Principles

Photogrammetry processes multiple photos taken from different angles to generate point clouds, meshes, or textured models through feature matching and triangulation. Mechanical engineers benefit from its scalability for objects ranging from small components to large machinery, often achieving sub-millimeter accuracy with proper calibration tools like coded targets. It complements structured light scanning by adding visual textures and global spatial references, reducing alignment errors in hybrid workflows.​

Applications in Mechanical Engineering

  • Reverse Engineering: Captures legacy parts without CAD files, enabling design modifications or reproductions for worn components.​

  • Quality Inspection: Measures deformations, verifies assemblies, and supports dimensional analysis in aerospace and automotive sectors.​

  • Large-Scale Documentation: Maps industrial equipment or vehicle frames, preserving both geometry and appearance for archiving.​

Workflow Steps

Engineers start by placing markers and scale bars on the object, then capture high-resolution images around it using a DSLR or smartphone. Software like Autodesk ReCap or Agisoft Metashape processes the data into 3D models, followed by cleanup in CAD tools such as SOLIDWORKS for integration into design pipelines. Hybrid setups with scanners like Revopoint MIRACO Plus enhance precision for reflective or detailed surfaces.​

Tools and Software

Popular options include open-source tools like Meshroom for budget workflows and professional suites like RealityCapture for high-fidelity results. Mechanical engineers familiar with CAD/CAM can import photogrammetry outputs directly into Fusion 360 or CATIA for further analysis. Accessibility has grown with mobile apps, though metrology kits ensure engineering-grade accuracy.


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