Enhanced Geometry Solutions - LeiosMesh

LeiosMesh is an affordable but powerful 3D scanning and reverse engineering software for the elaboration of 3D scannings and for simple reverse engineering activities. The software loads the point cloud from any scanning system, registers the different scannings and quickly processes and transforms them into a single watertight mesh model, valid for rapid prototyping, finite element analysis, animation, control and inspection.


Quality inspection	Industrial design	Simulation and analysis

Surveying	Engineering	Medical industry

LeiosMesh imports data obtained with 3D scanners or touch probes for transforming the point clouds, typically derived from the scans, in mathematical meshes or NURBS: this procedure is called "reverse engineering". With LeiosMesh you can transform the mesh in a model out of NURBS patches, automatically or semi-automatically, drawing the boundaries of the patches directly on the mesh.

Standard Workflow:

Import of the 3D point cloud data from a file produced by the measuring system (laser or touch-probe 3D scanner, digitiser, structured light, time-of-flight, CMM machines) in ASCII, STL and other formats.
Registration and merging of several clouds or meshes in a single cloud.
Primary processing of the point cloud: noise and redundancy cleaning, filtering, smoothing and so on.
Automatic triangulation procedure transforms a disordered point cloud into a triangle mesh.
Further processing of the triangle mesh: manifold healing, smoothing, hole-filling, decimation or refinement etc.
Automatic or semi-automatic model reconstruction with NURBS patches.
Comparison between mesh model and NURBS model.

LeiosMesh: affordable but powerful 3D scanning and reverse engineering software

Specifications

Import/Export files
- CAD Formats: iges, sat, step, (native formats can be provided upon request);
- Point formats and Polygon formats: asc, txt, dat, asd, stl, vrml, obj, ply, scanner specific formats.
Edit
- Undo and Redo with no limits;
- Registration, alignment and merge of point clouds and meshes;
- Transformations point cloud, mesh and entities: Shift, Rotate, Scale, Mirror, from wcs to wcs.
Point Cloud Phase
- Eliminating measurement noise: clean Noise and Redundancy;
- Point Cloud Filtering: stochastic, point density equalization, curvature-dependent;
- Smoothing, Offset.
Triangulation Phase
- Compute a triangle mesh from a point cloud using local model approximation by second-order surface;
- Mesh import, repairing corrupted STL files, elimination of spike triangles, abnormal and irregular triangles, non-manifold geometry correction;
- Smoothing, Fix Normals, Decimation;
- Fit selected mesh part to plane, cylinder, and sphere;
- Hole filling, partial or complete, flat or curvature based, Bridge between meshes;
- Defeature, Fit Boundary to Curve.
Edge Recognition Phase
- Edge Analysis: auto recognition of the model edges separating distinct regions;
- Editing Edges, Automatic determination of the edge fillet radius, check wireframe structure and dissection.
Modeling and Fit Tools
- Create / Fit primitives
  Point, Vector, Circle, Arc, Plane;
  Curve from edge (character lines), Cross sections: Linear, Radial, Along curve.
- Create and Edit wires
  Fit nurbs curves from point cloud;
  Edit spline, split, join, extend, bridge, match, trim, project, offset, smooth...
- Create NURBS surfaces
  Mesh faces fitting based on dissection, inside curves;
- Reference Entities
  Axis, Plane, WCS, Automatic Calculation of the Symmetry planes and principal axes of the point-cloud or mesh.
Patching
- Autosurfacing
- Manaul patch creation
- NURBS G1 fitting
Automatic Analytical Nurbs-Based Model Reconstruction
With the available tools it’s possible to reconstruct freeform or prismatic models:
- Dissection of the model onto separate faces;
- Reconstruction of the wireframe and sheet models;
- Recognition of analytical surfaces (planes, cylinders, spheres);
- Constraints between analytical surfaces or Ref. entities (distance, angle, Perpendicularity, Parallelism);
- Automatic edge blending using predetermined fillet radii.
Analysis
- Measurement of Distance, Angle, Curve length, Face area, Volume;
- Evaluation and visualization of the quality of point cloud approximation by the NURBSmodel;
- Reports

The following PC hardware is recommended by EGS:

Processor: Intel Core Duo T2300 or higher, AMD X2 3800+ or higher;
Memory: 2GB;
Graphic Card: Nvidia Quadro / 6x series or higher, ATI/AMD “x” series / FireGL or higher;
Operating System: Windows XP Professional SP2 or higher, Windows Vista. (*)

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