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Leica Geosystems T-Scan Reference Manual

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Version 10.35
English
Leica T-Scan Collect
Reference Manual

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  • Page 1 Leica T-Scan Collect Reference Manual Version 10.35 English...

  • Page 2: Introduction

    No part of this User Manual may be reproduced in any form without prior and written consent from Leica Geosystems AG. Leica Geosystems shall not be responsible for technical or editorial errors or omissions.

  • Page 3: Table Of Contents

    Validity of this Manual ................... 1 Feedback ...................... 1 Contact ......................1 Contents ......................2 Revisions ......................6 T-Scan Collect - Software – Introduction ............7 Installation and Program Start ............... 7 Licensing ....................... 7 Working with Viewers ..................8 3D Viewer ..................... 8 Status Indicators ..................
  • Page 4 Smoothing (Triangle Mesh) ................. 47 Decimate Mesh (Triangle Mesh) ..............48 8.10 Sharpen Edges (Triangle Mesh) ..............49 8.11 Alignment Calibration .................. 49 Calibration ......................50 Calibrate measurement range ..............50 9.1.1 Preparation ..................50 9.1.2 Procedure .................... 50 Alignment Calibration .................. 53 9.2.1 Requirements for an Alignment Sphere ..........
  • Page 5 Post-Processing ................... 88 Calculation of Feature Lines ................ 92 13.1 Calculation of Feature Lines ............... 93 13.2 Calculation of V-Lines ................. 95 13.3 Interactive Generation of Polylines.............. 96 13.4 Processing of Polylines and Triangle Meshes ..........97 13.5 3D Viewer Control ..................99 Service ......................
  • Page 6 Keep On Top ..................124 Extras ......................125 18.1 Execute Macro ..................125 Help ......................126 19.1 About T-Scan Collect ................126 Appendix ..................... 128 20.1 DCOM Configuration ................. 128 20.2 T-Scan Collect vs. T-Scan Interface ............131 Index ......................135...

  • Page 7: Revisions

    Revisions Rev. Date Changes Author Released 04/2001 01/2003 Adjustments for version 3.0 10/2003 Adjustments for version 4.0 MPo/AB 4/2004 Adjustments for version 4.2 12/2004 Adjustments for version 5.0 5.01 5/2005 Adjustments for version 5.01 4/2006 Adjustments for version 6.0 SG/AB 7/2007 Adjustments for version 7.0 BK/SG...

  • Page 8: Scan Collect - Software - Introduction

     Installation of T-Scan Collect T-Scan Collect has been pre-installed on your system. If you want to install it again, please use the Product USB Stick. Please note that T-Scan Collect is a 64-bit application and will only run on 64- bit operating systems.

  • Page 9: Working With Viewers

    5 Working with Viewers 5.1 3D Viewer After the program start the user interface shows up: Title bar, contains the name of current project Toolbar with icons for frequently used functions Several toolboxes. To save space, you can minimize/restore the toolboxes by clicking on the corresponding button in their upper right corner 3D viewer with visualized data Coordinate axes...
  • Page 10 The area marked with in the above image shows the actual 3D viewer. The 3D Viewer toolbox provides access to frequently used display functions: Selection of viewing direction along the positive X, Y or Z coordinate axis. If you hold the <Shift>...
  • Page 11 Show coodinate axes: This option is only available if the viewing direction is along a coordinate axis (see ). The displayed coordinate axes are labeled. This function cannot be used at the same time as . If you rotate the scene in the 3D viewer, the coordinate axis are automatically hidden.
  • Page 12 Show/hide tie points: Toggles visualization of all tie points created with the Move Station wizard (see chapter 15.9). The viewing direction, position and zoom factor in the 3D viewer can be interactively controlled with the mouse. Activate the viewing mode or use <Space Bar>...

  • Page 13: Status Indicators

    Note By default, the center of rotation is in the center of gravity of the virtual box, which encloses the whole object. However, you can freely determine the center of rotation as described above. To set the center of rotation back to default, use the tool Axis rotation: Press the <Alt>...

  • Page 14: Additional Coordinate Axes

    T-Probe Reflector No Probe Online Transformation: This symbol indicates that an online transformation is active (see chapter 11.1.1). 5.3 Additional Coordinate Axes  By selecting , you can display additional coordinate axes at Settings Coordinate axes arbitrary positions within the 3D viewer. The following dialog appears: No additional coordinate axes The additional axes will not be displayed.
  • Page 15 Group: The folder symbol represents a group, which may contain data or other groups. Object name, data type and state: The object name is assigned automatically, but can be changed. The symbol depends on the data type and can look like this: Non-rasterized scan data Rasterized scan data Triangle mesh...
  • Page 16 Rename Renames the selected object. You can also achieve this by pressing <F2> or clicking on the selected object. Show / Hide Shows or hides object(s). You can also achieve this by clicking the symbols. Select / Selects or deselects object(s) Deselect Removes the selected objects and adds them to an internal clipboard Paste...
  • Page 17 Identifier: Displays the name of the reference point and allows renaming it Position: Displays the position of the current point Direction: If available: Direction from which the reference point was measured; the length of the direction vector is normalized to 1 and the point is shown in green.
  • Page 18 Neither the tangent nor the curvature of the created C0 (discontinuous): NURBS curve will be continuous The tangent of the created NURBS curve will be C1 (tangent continuous): continuous The curvature of the created NURBS curve will C2 (curvature continuous): be continuous Note Depending on the data and the settings you choose it might happen that the...
  • Page 19 Color Opens a dialog where you can choose a color for the selected objects Material The following dialog appears: Transparency: Enter the transparency of the object (in percent). 0% means the object is opaque, 100% means it is translucent. Shininess: Enter the shininess of the object (in percent).
  • Page 20 4. You can also use the shortcuts <Shift> + <PageUp> / <PageDown> / <Home> / <End > to select multiple objects. Please keep in mind that any changes you make are also saved in the project. The next time you open the project, all settings that were in effect the last time you saved the project will be active again.

  • Page 21: Customizing The User Interface

    If you defined your own toolbars, you can choose which to show or hide Reset Resets all shortcuts, menus and toolbars to the default settings of T-Scan Collect. All user- defined changes will be lost. This action cannot be undone! Left ...
  • Page 22 Commands You can add all listed commands to a toolbar. Left-click a command and drag it onto a toolbar while holding the mouse button down. When you release the mouse button, the command is added to the toolbar. You can also remove a command from a toolbar: Click the icon and drag it off the toolbar while holding the left mouse button down.
  • Page 23 Click Rename… to rename the selected toolbar. A dialog box appears where you can enter a new name for the toolbar. You can reset the standard toolbar to the default settings of T-Scan Collect by clicking Reset. This action cannot be undone! To reset all toolbars to the default settings of T-Scan Collect, click Reset All;...
  • Page 24 Press New Shortcut Key the new shortcut. Then click Assign. To remove the shortcut for a command, select the command and click Remove. To reset all shortcuts to the default settings of T-Scan Collect, click Reset All. This action cannot be undone! Options...

  • Page 25: Measurement

    7 Measurement 7.1 Selection of Measurement Mode  Measurement… To select a measurement mode, choose or use the Measurement Settings toolbox:  mode, object surfaces can be digitized. This mode is activated after the Surface program start by default  mode, single points will be measured with the T-Probe (Probe) 3D Point ...

  • Page 26: General

    7.2.1 General Color This button opens a dialog where you can specify a color for the last measurement data you acquired. 7.2.2 Line Scanner This dialog provides settings for adjusting the line scanner. If inappropriate settings are made here, however, you might not be able to acquire any measurement data. If you would like to restore the default values, click the Default Settings button.
  • Page 27 Surfaces Press Surfaces if you want to measure surfaces. In this mode, measured data are rasterized immediately after acquisition using the selected settings (see chapter 7.2.3). Besides, the value will be used as well as the reflection filter defined in the materials editor (see Close gaps chapter 17.10).

  • Page 28: Surface Mode

    7.2.3 Surface Mode Line to line This value defines the minimum distance between two scan lines. The minimum distance prevents the acquisition of too dense data if the scanner is moved very slowly or not at all. The software checks if the scanner moved more than the entered Line to line value. If it did not, the current scan line is rejected.
  • Page 29 Note A rasterization process is started when the Measurement Settings for the Line Scanner is set to (see chapter 7.2.2) or Surfaces post-processing is started and the scene contains non-rasterized scanner data. Check angle of incidence If this checkbox is selected, a filter is applied to the data. The filter removes points measured with an angle of incidence that exceeds the specified maximum value.
  • Page 30 Angle treatment within a scan line No measurement data is acquired if the angle between the laser beam and the surface exceeds the entered value. To measure the surface completely, do two ...and then in the other direction. scans. Tilt the scanner first in one direction... Contour filter This filter is only applied if the measurement settings for the Line Scanner is set to Surfaces...
  • Page 31 Inappropriate measurement strategy: scanner is moved too fast and the scan line is almost parallel to the object’s contour. The contour filter will remove data. If the scanner is moved too fast relative to the selected point-to-point distance and the scan line is almost parallel to the object’s contour (see illustration), surface elements that do not lie completely on the object surface might be created between neighboring scan lines.

  • Page 32: Point Mode

    Appropriate measurement strategy: The scanner is moved perpendicularly to the object’s con- tour. The contour filter will retain all data. Max. line-to-point ratio If the speed the scanner is moved over a measurement object is too fast relative to the selected point-to-point distance, widely spaced scan lines will be created.

  • Page 33: Static Polyline Mode

    For this measurement mode, data is acquired and averaged internally. The averaged value is output as a measurement point. Measuring priority This setting controls the method how a 3D point is measured. By default, the following options are available: Precise, Standard Fast Next ID This field is only available in the settings for 3D points and defines the name for the next point...
  • Page 34 For this measurement mode, data is acquired and averaged internally. The averaged value is output as a measured point. Measuring priority This setting controls the method how a 3D point is measured. By default, the following options are available: Precise, Standard Fast...

  • Page 35: Dynamic Polyline Mode

    T-Probe is activated in the selected measurement mode (Surface, 3D Point, Static Polyline). The Start icon is disabled and the Stop icon is enabled. 7.3.1 Surface Mode In Surface Mode, 3D points on the object’s surface can be measured with the T-SCAN scanner.

  • Page 36: Point Mode

    The measurement itself is started as soon as you use the trigger button on the scanner handle. T-Scan Collect automatically becomes the active application – depending on the settings (see chapter 17.15) – if another application was active. You can make as many measurements as required.

  • Page 37: Static Polyline Mode

    To acquire a measurement point, press the trigger button on the T-Probe or press the <M> key. As soon as the measurement was successfully completed, the measurement point is displayed in green color. You can acquire as many measurement points as are required. Note Every measured point is stored in a separate data set and named according to the settings you made (see chapter 7.3.2).

  • Page 38: Dynamic Polyline Mode

    and connected to the previous point by a line. You can adjust the point size and line size (see chapter 17.3) to optimize the visualization. A polyline may contain any number of points. You can start a new polyline by pressing the <N> key. The last active polyline is closed and displayed in blue.

  • Page 39: Stopping A Measurement

    chapters 17.13 and 17.14) the T-Probe coordinate window and/or the wire frame model of the T-Probe will be displayed as soon as the measurement starts. As long as the right mouse button or the button of the T-Probe is pressed, points will continuously be acquired with the chosen settings (see chapter 7.2.6).

  • Page 40: Interactive Tools

    8 Interactive Tools There are several interactive tools you can use for editing existing data sets. These tools are  provided in the ‘Interactive Tools’ toolbox and can also be accessed by selecting Edit Interactive Tools or the drop down menu in the toolbar. The toolbox contains the following tools: Selection mode (“No Tool”) Interactive clipping...

  • Page 41: Selection Mode

    Press or the <Enter> or <Del> key to clip the selected areas. Press to undo the last action or actions you made. 8.3 Check Accuracy With this tool, you can check the measurement accuracy of the T-SCAN system.
  • Page 42 1. Before running an accuracy check, it is advisable to review the nominal values in the settings dialog 1. If you are using a barbell, enter the sphere radii into the corresponding fields. Sphere 1 corresponds to the red, to the blue sphere displayed in the toolbox. The Sphere 2 correct between the two spheres also needs to be specified.
  • Page 43 selected points are part of the plane, whereas surfaces or data sets located behind the plane are to be left unconsidered. 2. Now use the lasso in the 3D viewer to select the first or the only sphere/plane you want to check.

  • Page 44: Cross Sections

    3D viewer displays the determined distance. Repeating a calculation will overwrite existing results. 6. The icon clears all results of the sphere and plane fits as well as the objects created in the 3D viewer. 7. By default, the lasso is selected for creating the set of points for the fit.

  • Page 45: Create Reference Points

    The cross sections toolbox provides access to manipulation functionality for the cross section plane . The cross section plane and, if activated, the auxiliary planes for multiple sections, are visualized. Selection of the cross section plane direction (along the coordinate axes) Position of the cross section plane along the selected coordinate axis Center the cross section plane in the data set Open the dialog with the cross section settings;...

  • Page 46: Fill Holes (Triangle Mesh)

    1. Before creating a reference point, it is advisable to review the settings. Click on the Settings button to open the dialog:  is disabled, the software will try to fit a sphere with the Fit with free radius given radius into the data. This may lead to an error message if it is not possible to calculate a reasonable result, e.g.

  • Page 47: Create Bridges (Triangle Mesh)

    Holes can be selected in two different ways:  Move the mouse cursor over the triangle mesh area you want to edit. If view mode is currently active, change to tool mode by pressing <Space Bar> in the 3D viewer. Holes in the data set in the area near the mouse cursor are detected automatically and shown with a yellow border.

  • Page 48: Smoothing (Triangle Mesh)

    Move the mouse over the triangle mesh area you want to edit. If view mode is currently active, change to tool mode by pressing <Space Bar> in the 3D viewer. To create bridges, move the mouse over the area to be edited until the area is highlighted in yellow.

  • Page 49: Decimate Mesh (Triangle Mesh)

    Move the mouse over the triangle mesh area you want to edit. If view mode is currently active, change to tool mode by pressing <Space Bar> in the 3D viewer. A circle is displayed around the mouse cursor showing the radius of effect of the tool (“brush size”).

  • Page 50: Sharpen Edges (Triangle Mesh)

    8.10 Sharpen Edges (Triangle Mesh) This tool provides the possibility to sharpen edges of triangle meshes interactively. This functionality is available if a single triangle mesh is loaded. The following toolbox appears: Move the mouse over the triangle mesh area you want to edit. If view mode is currently active, change to tool mode by pressing <Space Bar>...

  • Page 51: Calibration

    Environmental influences (such as temperature changes or transport of the system) may lead to a gradual decrease in data quality. To increase data quality, T-Scan Collect offers the alignment calibration feature which the user can – and should – perform on site if: ...
  • Page 52 First measurement: keep scanner distance Second measurement: keep scanner distance constant (Close End*) constant (Far End*) *: For the definitions of these terms, see graphics in chapter 17.12. Avoid measurements where the laser does not Avoid measurements where the laser does not hit the surface perpendicularly hit the surface perpendicularly Avoid tilting the scanner, so the markers do not...
  • Page 53 Now measure the plane one time using the Close End of the scanner and another time using the Far End of the scanner (“Calibration measurement”). In the 3D viewer, select the two data sets using the lasso. Take care not to select points which do not lie on the plane.

  • Page 54: Alignment Calibration

    (non-volumetric scattering), specified by Leica Geosystems. These spheres are between 40 mm and 105 mm in diameter. The form error and the radius of such a sphere are known with an uncertainty of less than 20 µm.
  • Page 55 Left face Top face Back face Right face...
  • Page 56 For each main position 11 scans need to be acquired: Center position 3 scans: Middle, left, right Rotated to the left Rotated to the right 3 scans: Middle, left, right 3 scans: Middle, left, right Centered, diagonal Centered, diagonal 1 scan 1 scan...

  • Page 57: Step-By-Step Guide

    9.2.3 Step-by-Step Guide 1. Open the Alignment toolbox. measurement mode is activated automatically. Alignment 2. Press Start. 3. Measure the alignment sphere as described in chapter 9.2.3. Data measured in mode is displayed in green by default to distinguish it from other data. Alignment 4.
  • Page 58 Check the color of the traffic light symbol and follow the displayed advice. If a red traffic light appears, please check whether a correct radius value was entered. A yellow light indicates a significant improvement in comparison to the previous state. It is recommended to repeat the calibration in order to verify the result.
  • Page 59 12. When you click Apply, the result of the calculation is applied to the actual calibration. 13. To verify the alignment, repeat the alignment measurement from step 3 as described above. 14. When you close the alignment toolbox, the measurement mode that was active before is restored.

  • Page 60: Working With Files

    10 Working with Files All file-related commands are provided in the menu. The available commands are File described in detail below. 10.1 Create New Project  To create a new project, click New in the standard toolbar or choose . If new or File changed data is still in memory, a dialog appears asking if you want to save the changes.

  • Page 61: Using The File Menu

    10.5.1 Using the File Menu If you want to add data to a specific group, you first have to select the group or a data set from  that group. Then click Import in the standard toolbar or choose File Import...

  • Page 62: Using The Data Explorer

     Hierarchy (Data Explorer)    Unstructured Pointset           LineScanSet           RangeImage         PolyLine ...

  • Page 63: Processing Of Data Sets

    11 Processing of Data Sets All processing functions are provided in the menu. Edit 11.1 Transform Data  To transform all loaded data sets, choose . The following submenu Edit Transform data appears: 11.1.1 Transform   Choose . The following dialog appears: Edit Transform data Transform...

  • Page 64: Transform To Nominal Points

     Use transformation file In this mode, you need to specify a transformation file. The rotation angles and the translation values are stored in this file.  Use given values In this mode, the rotation angles and the translation values to be applied need to be entered in the input fields.
  • Page 65 With the wizard, you can load, save and manually edit nominal point lists. The following functions are available: Input box: ID This input box defines the ID that will be assigned to the next point to be created. Input box: X | Y | Z These input boxes define the X, Y and Z components of a nominal point.
  • Page 66 With the right mouse button, you can exclude individual coordinate components of a point from the calculation. When you right-click the component of a point, its state changes from active to passive, and vice versa. Use this possibility if not all coordinates of a nominal point are known or are to be used.
  • Page 67 If no coordinate components were excluded, the correspondences between the measured points and the nominal points are determined automatically. If coordinate components were excluded, you need to define the correspondences manually through the ID, i.e. by measuring the points in the correct order. The following functions are available: Column: ID If coordinate components were excluded, the IDs of previously measured points are displayed.
  • Page 68 Measure When you click this button, the point you last selected in the table is measured with the T-Probe. If the measurement succeeded, the next point in the list is automatically selected. Note You can also start a measurement by clicking the right mouse button or pressing <M>. Delete Use this button to delete the coordinates of the currently selected points from the list.
  • Page 69 Columns: ID | X | Y | Z The first column of the table shows the ID, the other columns show the X, Y and Z coordinates. Three rows are displayed for each ID:  Nom: This row shows the nominal values as entered on the page of Edit the nominal points the wizard (if applicable, scaled by the nominal scaling factor).

  • Page 70: Planes Alignment

    By pressing the Back button, you can access the previous pages of the wizard and make modifications. If no coordinate components were excluded, the corresponding IDs that have been calculated automatically are now displayed as well. For example, you can exclude the ID that shows the maximum 3D deviation from the calculation by returning to the page and deselecting that specific point.
  • Page 71 Use the provided tools to select all reference planes one after the other and assign the respective point data to paraxial nominal planes. The following drawing tools are available: Shape of selection: rectangle, circle, ellipse Shape of selection: polygon Confirm the shape created with tool Discard an unconfirmed shape created with tool Drawing mode Viewing mode...
  • Page 72 As soon as you click one of the tools , you need to define the position of the plane in the following dialog: When you click OK, a plane fit is calculated based on the selected points, and plausibility checks are performed for planarity of data, angles to already created planes, etc. After successful completion of the best fit, the plane object is added to the list of reference objects.

  • Page 73: 3-2-1 Alignment

    Basically you can assign any number of reference planes to a main axis plane – also at different axis positions. You need to make sure, however, that you only select the data of a single plane and a single position in each step. Also be careful that no data from other areas is accidentally selected as well.
  • Page 74 The tools are grouped as follows: Functions and tools for the extraction of alignment elements (planes, vectors, points) from 3D data. Functions and tools for the calculation of alignment elements from existing alignment elements. Functions and tools for the manipulation of alignment elements. Functions and tools for 3D viewer control.
  • Page 75 click. To start the calculation of the best fit cylinder, press the <F2> key. Since not the cylinder but its axis will be used for the alignment, the cylinder axis is displayed as a vector after the fit has been performed. Tool for the calculation of the boundary planes of the 3D data for a selected area of the 3D data.
  • Page 76 Functions for the Manipulation of Alignment Elements This function is used to reverse the direction of all selected vectors in the scene explorer This function is used to reverse the direction of all selected planes in the scene explorer This function is used to translate all selected planes in the scene explorer in normal direction.

  • Page 77: Scale

    11.1.5 Scale   To scale all loaded data sets, choose . The following dialog Edit Transform data Scale appears: Enter the factor and start the calculation by pressing OK. 11.1.6 Mirror   To mirror all loaded data sets, choose .

  • Page 78: Decimating

    Strength of filter Determines the strength of the filter. Valid values are in the range of 0 (no filtering) to 1 (strong filtering). Weighting factor of edges Determines the weighting of object edges. Valid values are in the range of 0 (object edges will not be specially treated and will be filtered) to 1 (object edges will not be filtered).
  • Page 79 The current 3D view with all measurement data is displayed; each measurement is in a group and the first measurement is locked. You can now group or ungroup data sets, lock or unlock individual groups, and use or ignore them. When you have made the required settings, you can start the matching.
  • Page 80 All selected groups are used during matching. All selected groups are ignored during matching and will not influence the match result. When you press Start Matching, the optimization is started. The dialog will then look like this: After each iteration, key information about the matching process is shown in the list (center right) and in the text fields (bottom right): ...
  • Page 81 You can specify the interruption criteria for the iteration in the dialog for the surface matching parameters. These parameters are described in more detail in chapter 17.2. You can also set this parameter from this dialog by clicking the button to the right of Start Matching. You can also interrupt the iteration of the surface matching by pressing the Stop Matching button.
  • Page 82 the mouse. At this position, a small sphere is displayed for better orientation. It does not matter in which of the two windows you mark the point first. When the surface point is marked in both windows, the system automatically starts the surface matching.

  • Page 83: Tolerance Based Matching

    Note To simplify assessment of the match result, each group and each measurement are displayed in a different color. This makes it easier to identify how well the measurements overlap in the overlapping area. By pressing <Space Bar> (if the cursor is in one of the two 3D views), you can toggle the mode of operation for the two 3D views between point definition (cursor) and viewing mode (hand).
  • Page 84 In the main part of the dialog, a 3D viewer visualizes the measurement object. The table below it displays the match results . The size of the result table can be modified by placing the cursor over the dividing line between the 3D viewer and the result table. When the cursor changes to a vertical double-headed arrow, press and hold the left mouse button and resize the table.
  • Page 85 is active, only overlapping scans that are in separate groups are automatically colorized.  If you created groups with the Move Station wizard before starting tolerance based matching, and if the Groups checkbox is active, the value defines the Tie points distance the groups may be moved.

  • Page 86: Optimize Triangle Meshes

    Before you start matching, specify the required tolerance value. Then click the Start matching button. During matching, the standard deviation, mean value and convergence for each data set are displayed in the result table. The Constraints value indicates the distance by which each data set was moved from its original position.

  • Page 87: Remove Outliers

    A mesh – or part of it – is identified as isolated and thus removed if its triangle count is less than Minimum number of triangles per mesh 11.4.2 Remove Outliers Using this function, individual triangle mesh knots that protrude significantly from their environment can be moved towards the surrounding surface.

  • Page 88: Curvature Based Decimation

    11.4.4 Curvature Based Decimation This function is used for decimating triangle meshes in such a way that the resulting mesh does not differ from the original mesh by more than the specified tolerance, and the resulting edges of the triangle do not exceed the specified length. ...

  • Page 89: Post-Processing

    12 Post-Processing T-Scan Collect offers the possibility to automatically post-process the acquired 3D surface data in order to create a triangle mesh. To automatically post-process the data, click the Post-Processing icon in the standard toolbar  or choose . The following dialog appears:...
  • Page 90 To perform a data analysis, mark characteristic areas of the object by creating polygons on the object. First rotate the object to the desired viewing angle and change to the tool mode of the 3D viewer by using <Space Bar>. With a single left-click you define a polygon point, and with a double-click you end the polygon.
  • Page 91 Tolerance for smoothing This parameter can only be changed if is active. It defines the maximum Final mesh smoothing permissible shift of points in the triangle mesh relative to the original data. Total error of mesh calculation This value is calculated automatically and indicates the sum of the permissible tolerances of the individual steps.
  • Page 92 Execute post-processing in the background is sent to another instance of T-Scan Collect and processed there. In the meantime you can work normally in the main instance and, e.g., start new measurements. Enter a valid path into the field...

  • Page 93: Calculation Of Feature Lines

    13 Calculation of Feature Lines  For the calculation of feature lines, choose . The calculation of feature Edit Feature lines... lines only works on triangle meshes. The following dialog appears: In the left part of the window, the loaded triangle meshes are displayed. Below the 3D viewer, the status bar indicates how to use the individual tools.

  • Page 94: Calculation Of Feature Lines

    Functions and tools for the processing of polylines and triangle meshes Functions and tools for 3D viewer control In the project, the generated feature lines, V-lines and polylines are grouped as follows:  Theoretical_Intersections: Contains all objects that were generated from the section of planes ...
  • Page 95 For a better graphical orientation, the two points you clicked are displayed as small green spheres. At the first point, a cylinder of the length and with the Step Width specified is shown as a semi-transparent graphic. If the distance limit is Radius active, a disk with the radius from is also displayed.

  • Page 96: Calculation Of V-Lines

    Here, you determine whether only the theoretical intersections or the surface data or both are to be extracted. This tool is used to define the step width interactively in the 3D viewer. Click two points one after the other (preferably on the feature line) in a distance that corresponds to the step width.

  • Page 97: Interactive Generation Of Polylines

    Selection of any data objects (triangle meshes, feature lines, polylines, etc.) With this button, all displayed triangle meshes can be hidden and shown again later. At present, there are no global settings for the calculation of V-lines. This tool is used to define the step width interactively in the 3D viewer. Click two points one after the other (preferably on the V-line) in a distance that corresponds to the step width.

  • Page 98: Processing Of Polylines And Triangle Meshes

    Selection of any data objects (triangle meshes, feature lines, polylines, etc.) With this button, all displayed triangle meshes can be hidden and shown again later. At present, there are no global settings for the interactive generation of polylines. With this button, you can extend an existing polyline. First, select the polyline that is to be extended by clicking onto it in the 3D viewer.
  • Page 99 Please keep in mind that the smoothed line will be saved as a sampled polyline with the original number of nodes. Selection of any data objects (triangle meshes, feature lines, polylines, etc.) With this button, all displayed triangle meshes can be hidden and shown again later.

  • Page 100: Viewer Control

    With this button, you can fit the corner. As a result, you will get three polylines along the edges of the corner, with the corner point as the start of the polylines. Draw a polygon around each area of the object through which you want to fit a plane and which represents a boundary surface of the corner.

  • Page 101: Service

    14 Service Service functions are password protected and only accessible to service personnel.

  • Page 102: Tracking System

    15 Tracking System 15.1 Initialize To initialize the tracking system, open the Tracker menu and select . The tracking Initialize system will reference its axes and the status display of the tracking system changes to green or yellow. 15.2 Disconnect/Connect command can be used to disconnect the software from the emScon server to Disconnect allow other software to access the emScon server.

  • Page 103: Laser Control

    15.4 Laser Control In the Tracker menu select . The following dialog opens: Laser Control Laser On This will turn the laser on. Please note that for trackers before AT generation, turning on the laser will take a warm-up time of 15 - 20 minutes. Laser Off This will turn the laser off.

  • Page 104: Go Birdbath

    15.8 Go Zero Position This command sends the laser beam into a position in front of the Laser Tracker where the beam can be caught with a prism of the T-Scan or T-Probe. 15.9 Move Station The wizard for moving the station assists you when you need to (repeatedly) move the tracker, for example because of the size of the object.

  • Page 105: Measuring The Pass Points

    15.9.1 Measuring the Pass Points Start measuring the data as usual. After you have acquired all data from this tracker position  select Move Station from the standard toolbar or choose . A wizard will Tracker Move Station open. If the wizard is opened for the first time, the page will appear.

  • Page 106: Selection Of Pass Points

    Note You can also delete selected pass points by pressing <D> or <Del>. Delete All Use this button to delete all points in the list. Load / Save Opens a file selection dialog to load or save a pass point list. Note You need to acquire at least three pass points to be able to continue.

  • Page 107: Moving The Station

    The next time the wizard is started, the page is displayed. This page Select the pass points displays all the pass points you measured before and offers you the possibility to select points. The selected points will be measured in the next step of the wizard and used to calculate the transformation.

  • Page 108: Transformation Results

    15.9.5 Transformation Results The calculation of the transformation automatically determines which points correlate with each other. On completion of this calculation, the points acquired in the previous step Measure the pass points automatically obtain an ID. Points for which no correspondences could be determined, are not assigned an ID.

  • Page 109: Invoking Move Station Again

    Next because the reference points for the current tracker position have already been acquired during the last execution of the wizard. This also applies if you restart the T-Scan Collect application and load a file that involved working with the wizard.

  • Page 110: Release Motors

    15.10 Release Motors The Release Motors command unlocks the Tracker head if it was locked before, e.g. on a specific target. The user is now able to point the laser to another position by moving the Tracker head manually.

  • Page 111: Digitize

    16 Digitize 16.1 Start  To start a measurement, click the Start button in the standard toolbar or choose Digitize Start See chapter 7 for more detailed information on measuring. 16.2 Stop  To stop a measurement, click the Stop button in the standard toolbar or choose Digitize Stop 16.3 Information...
  • Page 112 column indicates the number of valid points of a data set. Some data types (e.g. Valid points RangeImages) may also contain invalid points. column shows the total number of points of a data set, including invalid points. Since All points invalid points take up memory, too, this column indicates the total amount of memory used by a data set.

  • Page 113: Settings

    17 Settings 17.1 Cross Sections  To open the dialog for configuring the cross section settings, choose Settings Cross Sections... The different fields have the following meanings: Filter cross sections Select this checkbox to smooth the point data of the cross section with a Gaussian filter. All points within the selectable are filtered.

  • Page 114: Matching

    Connect partial polygons Select this checkbox to connect cross section segments or point cloud segments of several data sets to a closed polyline. With , you specify the point Maximum distance of source points distance on the polyline to be created. Please enter a value that is greater than or equal to the point distance of the original data.
  • Page 115 The fields have the following meanings: Subsampling rate for point clouds Define the subsampling rate you want to use for matching. Since the data for the matching has to be duplicated and processed, the additionally required memory very much depends on the subsampling rate entered here.

  • Page 116: Viewer

    17.3 3D Viewer T-Scan Collect provides two different display modes. The static display mode describes the display of the still object. If the object is moved, e.g. by rotation or zooming, it is displayed in the dynamic display mode. You can set the visualization parameters separately for the two modes. Typically, a higher subsampling value is used in the dynamic mode to allow smooth rotation and zooming even for large objects.

  • Page 117: Surfaces

    17.3.3 Surfaces Subsampling This parameter influences the reduction of the data for visualization. A subsampling value of 4 means that only every 4 point in the row and column directions of the surface is displayed and, thus, detail resolution is reduced by the factor 16 in the visualization. Display mode Select whether you want to display the measured surface as a filled surface , as a surface...

  • Page 118: Other Settings

    If you uncheck is too small, it may Show isolated points Maximum scanline distance happen that no data is displayed even though there is data. Therefore, you should preferably always have this option checked. Aspect ratio Extremely acute-angled triangles are not displayed. Such triangles will be created, for example, if measurement data is acquired with the scanner across an object edge, because neighboring pixels will then lie on different planes.

  • Page 119: Dynamic Camera

    Backface color Sets the color for the back faces of surface objects in a color selection dialog. Please note that this color is only used if you have chosen special color Display mode for backface Mesh boundary color Sets the color for triangle mesh boundaries in a color selection dialog. 17.4 Dynamic Camera Typically, the scene in the 3D viewer is displayed statically while the wireframe of the scanner –...

  • Page 120: Coordinate Axes

    : The perspective is chosen in a way that you are always viewing the top, Isometric view, vertical left, rear side of the scanner. Camera mount : The view is fixed to the wireframe of the scanner; the scanner is Fixed camera mount displayed statically in the middle of the 3D viewer.

  • Page 121: Measurement

    17.8 Measurement  To change the measurement settings, choose . The dialog box that Settings Measurement appears is described in chapter 7.1. Please refer to that chapter for detailed information on the individual parameters. 17.9 Acoustic Feedback  Choose to assign sound files to specific states or events: Settings Acoustic feedback Use this button to toggle between three states: All entries are activated;...

  • Page 122: Materials

    A point acquired with the T-Probe is deleted Note Please note that the .wav file format allows a lot of different internal settings. T-Scan Collect does not support all of these versions, so it may happen that certain files cannot be used or played, although other media players can play them.

  • Page 123: Adjust Size Automatically

    a range from 0.25 to 5 ms) for bright objects and longer exposure times (up to 20 ms) for dark objects. If the exposure time is not adjusted to suit the object’s reflection properties, it may happen that no measurement data is generated or that there are gaps in the measured data. An optimum exposure time is the shortest time by which the acquired data is complete and independent of the scanner orientation and the distance to the object.

  • Page 124: Display T-Probe

    The start , middle and end of the scanner’s measurement range are indicated by lines. This is especially helpful for controlling the scanner’s distance to the object.  To toggle the display of the scanner position, choose Settings Display scanner 17.13 Display T-Probe This setting only applies to the 3D point mode and the static polyline mode.

  • Page 125: Keep On Top

    17.15 Keep On Top When is active, T-Scan Collect will always become the active application as soon as Keep on top the trigger button on the handle of the scanner is pressed.

  • Page 126: Extras

    18 Extras 18.1 Execute Macro  To execute macros, choose Extras Execute Macro... A file selection dialog appears where you can choose the macro to be executed. Click the Open button to execute the selected macro.

  • Page 127: Help

    19 Help You can open this manual by pressing <F1> in the T-Scan Collect application. The status bar and the tooltips in the application provide additional helpful information. 19.1 About T Scan Collect  About T-Scan Collect … To display information about T-Scan Collect, choose .
  • Page 128 Note When you receive the new license file, e.g. x-xxxxxxx.WibuCmRau, save this file and execute it – with the dongle connected – by double-clicking the file. The license will then be activated on the dongle.

  • Page 129: Appendix

    20 Appendix 20.1 DCOM Configuration The COM port of T-Scan Collect can be set to allow sharing over the network. This setting is necessary e.g. to execute post-processing on a network computer (“external post-processing”). The steps described in this chapter require experience in DCOM configuration and security policies. If you are unsure or if you cannot make these settings due local security policies, please ask your system administrator to do the DCOM configuration for you.
  • Page 130  Select the COM Security tab and click Edit Limits… under Access Permissions. Add the user Everyone and set all checkboxes to Allow.  On the COM Security tab, click Edit Limits… under Launch and Activation Permissions. Add the user Everyone and set all checkboxes to Allow. ...
  • Page 131  Switch to the Security tab and select Customize for both, the Launch and Activation Permissions and the Access Permissions.  Click Edit under Launch and Activation Permissions, add the user Everyone and set all checkboxes to Allow.  Click Edit under Access Permissions, add the user Everyone and set all checkboxes to Allow. ...

  • Page 132: T-Scan Collect Vs. T-Scan Interface

    20.2 T-Scan Collect vs. T-Scan Interface Collect 10.3x Interface 10.3x Toolbars Open Save Save as Import Export (AC only) Postprocessing Start Stop Move station Info Selection Clipping Accuracy Cross sections Fill holes Create bridges Smoothing Decimation Sharpening edges Alignment Measuring range...
  • Page 133 Export (AC only) Exit Edit Menu Transform data Transform Transform to nominal points 3 planes alignment 3-2-1- alignment Scale Mirror Optimize data Smoothing Decimation Matching Global matching Tolerance based matching Optimize triangle mesh Remove unassociated areas Remove outliers Noise reduction Curvature based decimation Smoothing Flip inside/outside...
  • Page 134 Sharpening edges Alignment Measuring range Reference points Data analysis Service Menu Adjust alignment Start data collection Contour filter Accuracy analysis Change password Activate/Deactivate View Menu Toolbar Statusbar Customize Reset Left <-> Right Tracker Menu Initialize Disconnect/Connect Environmental parameters Laser control Reflectors Information Go birdbath...
  • Page 135 Cross sections Matching 3d viewer Dynamic camera Coordinate axes Accuracy check Measuring mode Measurement Acoustic feedback Materials Adjust size automatically Display scanner Display T-Probe Display T-Probe coordinates Keep on top Extras Menu Execute macro ? Menu Help About T-Scan Collect/Interf.

  • Page 136: Index

    21 Index DCOM configuration ............ 123 Dynamic Polyline Mode ..........36 3 Planes Alignment ............67 3-2-1 Alignment ............70 3D Point mode .............. 34 Export ................59 Settings ..............30 Exposure time .............. 117 3D Viewer ................ 8 Settings ..............111 Feature lines ..............
  • Page 137 dynamic Polyline ............33 Settings 3D Point ..............31 Static Polyline ............31 3D Point mode ............30 Mirror ................74 3D Viewer ............... 111 Color ................. 24 Cross sections ............108 Nominal points .............. 62 dynamic Polyline ............33 Transformation result ..........
  • Page 138 Create bridges ............45 Curvature based decimation ........84 Viewer Decimation ............... 86 Axis rotation .............. 11 Flip inside/outside ............ 17 Center of rotation ............. 11 Noise reduction ............83 Illumination ............... 12 Remove outliers ............83 Orientation ............... 11 Remove unassociated areas ........
  • Page 139 Original text Published in Switzerland © 2017 Leica Geosystems AG, Heerbrugg, Switzerland Leica Geosystems AG Heinrich-Wild-Strasse CH-9435 Heerbrugg Switzerland Phone +41 71 727 31 31 www.leica-geosystems.com...

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