The meshing process offers the following parameters:
Parameter Name |
Default Value or Ratio |
Link with which parameters |
Information on the Parameter |
Main Parameters |
|
|
|
MainParameters:AverageEdgeLength |
2.0 |
Not a ratio, defined in the unit of your point cloud |
The average triangle size when we start the mesh- ing. You can adjust this value depending of the size of the object and the distance between points in the Point Cloud. |
MainParameters:SmallestHoleDiameter |
6.0 |
Not a ratio, defined in the unit of your point cloud |
Define the minimal hole size that you want to detect. -1.0 means that we try to fill holes as much as possible. |
MainParameters:IgnoreScanDir |
false |
|
Some clouds could contain bad scan direction data. This parameter is used to avoid using scan directions |
Preprocessing |
|
|
|
PreProcessCloud:ExplosionDistance |
20 |
Not a ratio, defined in the unit of your point cloud |
Disconnected parts are split using this threshold distance and we keep the biggest part. You can modify the threshold for the split or remove this parameter if you want to keep everything. |
PrePreocessCloud:NoiseReductionThre shold |
80 |
Unitless. Value between 0 and 100 |
Can filter the cloud to reduce the noise of the cloud. 80 is a good value if the cloud is noisy. |
ReductionRatio |
1 |
Unitless. Value between 0 and 1 |
Reduce the cloud before meshing in order to speed up computation. 0 means that no point is kept, 1 means that all points are kept. |
InitialMeshing |
|
|
|
InitialMeshing:BorderExtensionParamete rs:Deviation |
*0.1 |
MainParameters:AverageEdge Length |
This parameter is used to extend border after the first meshing step. The idea is to better fit to the border of the cloud. |
InitialMeshing:MaxTriSize |
*3 |
MainParameters:AverageEdge Length |
Maximum triangle size |
InitialMeshing: FillNonRegularHoles |
0 |
Unitless |
3 levels of Holes Filling: 0: Preserve holes in areas without acquired point cloud. 1: Try to fill some holes that are suspect due to missing data 2: Try to fill lot of holes to create watertight mesh. |
InitialMeshing:MaximalHoleElongation Ratio |
3.0 |
Unitless |
Ratio between largest and second largest extend of the more elongated hole to be preserved. |
SmoothingDistanceFactor |
2.0 |
MainParameters:AverageEdge Length |
Use projection on implicit surface to de-noise the data. The factor multiplying the Average Edge Length to determine the distance of the Polyno- mial Surface from points are sampled. |
PostProcessMesh |
|
|
|
PostProcessMesh:BorderImprovement::M axEdgeLength |
*0.5 |
MainParameters:AverageEdge Length |
During border improvement, we have to subdivide the triangles around borders. This value indicate the max edge around borders. |
PostProcessMesh:BorderImprovement:Dis tanceSelection |
*2.0 |
MainParameters:AverageEdge Length |
Distance around borders to select triangles. |
PostProcessMesh:BorderImprovement:Sm oothingIntensity |
2.0 |
Unitless |
Intensity of the smoothing around borders. 0 means no smoothing, 5 means very high smooth- ing |
PostProcessMesh:BorderImprovement:M axDeviation |
0.1 |
MainParameters:AverageEdge Length |
Maximal distance allowed between surfaces be- fore/after the smoothing |
PostProcessMesh:Smoothing:Intensity |
2.0 |
Unitless |
Intensity of the smoothing around borders. 0 means no smoothing, 5 means very high smoothing |
PostProcessMesh:Smoothing:MaxDevia tion |
*0.1 |
MainParameters:AverageEdge Length |
Maximal distance allowed between surfaces be- fore/after the smoothing |
PostProcessMesh:Reduce:MaxDeviation |
*0.0025 |
MainParameters:AverageEdge Length |
Reduce triangles in flat areas: this parameter defines the max deviation allowed between the original mesh and the reduce one. |
PostProcessMesh:Reduce:EdgeMaxLenght |
* 4 |
MainParameters:AverageEdge Length |
Maximal edge length allowed in the resulting mesh. |
*PostProcessMesh:Refine:MaxDeviation |
* 0.01 |
MainParameters:AverageEdge Length |
This parameter is used to refine the mesh. This parameter is linked to the final quality of the mesh AND also link to the accuracy of the scanner/point cloud. If this parameter is too small compare to the noise thickness, it will lead to ‘waves’ effect in the final mesh. |
PostProcessMesh:Refine:MinimalTriang leSize |
* 2 |
PostProcessMesh:Refine:MaxDe viation |
Minimum triangle size during there fine. |
PostProcessMesh:Refine:DistanceWron gPoint |
* 0.5 |
MainParameters:AverageEdge Length |
Maximum distance between points and mesh to be used for the refine: points that are far (using this param) are not used. |
PostProcessMesh:CurvatureSelection:Sel ectionRadius |
* 8 |
MainParameters:AverageEdge Length |
Radius of the neighborhood used for the curvature selector. |
PostProcessMesh:CurvatureSelection:Cur vedThreshold |
50 |
Curvature radius (the reverse curvature) in document units. |
Threshold for considering a triangle as curved or not (before the closing). The threshold is a mini- mum curvature radius. |
PostProcessMesh:CurvatureSelection:Whi teListThreshold |
30 |
Curvature radius (the reverse curvature) in document units. |
Threshold to select a triangle regardless of the closing. (White List Threshold must be less than or equal to Curved Threshold.) |
PostProcessMesh:CurvatureSelection:Blac kListThreshold |
100 |
Curvature radius (the reverse curvature) in document units. |
Threshold to not select a triangle regardless of the closing. (Black List Threshold must be greater than or equal to Curved Threshold.) |
PostProcessMesh:CurvatureSelection:Clo singRatio |
* 1 |
PostProcessMesh:CurvatureSelec tion:SelectionRadius |
Ratio of selection radius used for closing (dilation and erosion of the selection). |
{
“Version”:”0.2”,
“BaseUnit”:”mm”,
“EnableLog”:false,
“MainParameters”:{
“AverageEdgeLength”:1.500,
“SmallestHoleDiameter”:5.000,
“IgnoreScanDir”:false
},
“PreProcessCloud”: {
“ExplosionDistance”: 20.0
},
“InitialMeshing”:{
“BorderExtensionParameters”:{
“Deviation”:0.1
},
“MaxTriSize”:3.000,
“FillNonRegularHoles”:0,
“MaximalHoleElongationRatio”:3.0,
“SmoothingDistanceFactor”:1.0
},
“PostProcessMesh”:{
“BorderImprovement”:{
“MaxEdgeLength”:0.5,
“DistanceSelection”:2.0,
“SmoothingIntensity”:2.0,
“MaxDeviation”:0.1
},
“Smoothing”:{
“Intensity”:2.0,
“MaxDeviation”:0.1
},
“Refine”:{
“MaxDeviation”:0.010000,
“MinimalTriangleSize”:0.001500,
“DistanceWrongPoint”:1.5
},
“Reduce”: {
“MaxDeviation”: 0.0025,
“MaxEdgeLength”: 3.0
},
“CurvatureSelection”: {
“Selection Radius”: 8.0,
“CurvedThreshold”: 50.0,
“WhiteListThreshold”: 30.0,
“BlackListThreshold”: 100.0,
“ClosingRatio”: 1.0
}}}