icemsurf_扫描点云处理

nullnullBy implementation Consultant Peter ChennullBy implementation Consultant Peter Chen*Import of the scan data ~two functions: >File - Import : directly read into the database. > File - Preview - Point Clouds pre-processed in the previewer before saving them in the data *Previewer - be filtered and subdivided before saving them in the database. reduced data hierarchy - some geometry functions can be used to surface creation on the external scan. *Database: -in the database all ICEM Surf functions are availablenullnull*Preview Import - via File - Preview - Point Clouds as follows: 1. select in the window File Browser - Import 2. File Browser - Preview appears. - create a new preview - add to existing preview. 3.With the options determine the import conditions or edit the files #import was successful, the file name is deleted from the list of Files 4. be created in the directory "Scan " of the current project. data and structure of the original version ( original.data , original.struc ), selected data ( selected.data , selected.struc ), visible data ( preview.data , preview.struc ). nullBy implementation Consultant Peter Chen*functions available in the preview : Create Scan Triangulation Feature Line Modify Scan Edit Facets Delete Filter Invert Create Raw Data Sections Create Patch By 4 Points Modify Patch Refit Patch Create Curve Projection choose another preview directorynullESF file null*Scan Creation - Triangulation~2D triangulizer - divided into parallel boxes , then triangulated independently by computing a compensation plane - with undercut you have to select a sufficient number of boxes - works faster, however,not for complex geometries. ~ 3D triangulizer: - without dividing - into boxes and - without projection. - with complicated characteristics. no gaps ,be time-consuming. - surfaces with strong curvature changes, closed surfaces, or undercuts.2D-Triangulation with Overlapping3D 2D nullBy implementation Consultant Peter Chen*Scan Creation - Object-create scans on existing geometry objects-Patches , faces , raw data segments , point sets ( scan line).nullBy implementation Consultant Peter Chen*Scan Creation - Offsettriangulated scans or scan setsnull*Scan Creation - Feature Line-create characteristic or shape-defining curves and raw data contours (feature lines) on scans.-Feature Lines scan edges, sharp bends, in areas with a strong curvature change, at highlight or split lines.-mark any points lying on the characteristic mesh edges as base points for the feature line creation-base points form an invisible base polygon.-base polygon will be discretized and projected on the scan (Max. Distance:)Edge , Sharp Bend , Curvature , Highlight , Split LineHighlight and Split LineSplit LineHighlight Sharp Bend or Curvaturenullnull*Scan Modification - Edit Facetsnullnullnull*Scan Modification - Delete -points or facets of a scan may be deletednull*Scan Modification - Trim-a curve, raw data contour, or patch edge, which is projected onto the scan.-Tolerance >the discretization quality of the projection of limitation objects. >projected onto the scan in form of determined number of points. The lower tolerance, the higher the number of points calculated for the polygon and the more exactlynull*Scan Modification - Merge-several scans can be merged to form one single scan.null*Scan Modification - Dividenull*Scan Modification - Filternullnullnullnull*Scan Modification - Invert Scan Normal-the normal direction of a scan or scan set may be inverted.null*Scan Modification - Facet Modification-the quality of an existing triangulation may be improved.null*Scan Modification - Clay -Scans can be modeled globally and locally. -Apart from patches can also be selected scans as reference surface. -During modeling facets can be refined dynamically. -The modification region can be exactly defined.nullnull1. Create a new file named : SCANTEST 2. Import text file :revers1.txt,reverse2.txt 3. Create Preview file reverse.H:\ota-training\misc\reverse2.txtnull* to save preview as a SCAN datanull*scan datanull* To triangulationnull*to check scan by Featurenullnull*to create an offset scannull*to divide scannull*to merge againnull*to delete a areanull*to invert scannull* to trim scannull* create raw data by section * diagnoses in sections