3D Registration

Instructions for use

The 3D Registration feature supports 3D registration of a single Model Dataest.

Function entrance

  • Start tab-> Data Processing-> Create New Registration-> 3D Registration.

Operation steps

New 3D Registration

  1. Registration Layer: Select the Model Dataest for which 3D Registration is required
    • Datasource: Select the Datasource where the target Model Dataest is located through the drop-down menu.
    • Dataset: Select the target Model Dataest from the drop-down menu.
  2. Reference Layer：Select Reference Data。
    • Dataset: Check the Dataset radio box, and then Select the Reference Data set and its Datasource from the drop-down menus of Datasource and Dataset respectively.
    • Tile Layer: Check the Tile Layer radio box to select the reference Tile Data in the pop-up Browse Folder through the selection button on the right.
  3. After data selection, click the OK button to complete the wizard operation of New 3D Registration and enter the 3D Registration Window, as shown in the following figure:

Add a control point

Add a registration control point at the feature point position of the Registration Layer, and at the same time, find the homonymous point of the point at the corresponding feature position of the Reference Layer. The essence of this process is to identify a series of control points to link the location of the registered Dataset with the location of the Reference Data. A control point is a location that can be accurately identified in the registered Dataset and actual coordinates.

Currently, it is supported to add control points through manual prick points and Import Control Points. The specific operation steps are as follows.

  1. Manual puncture point
    • On the 3D Registration tab, in the Control Point Settings group, click the Prick Point button and move the mouse to the scene to make a stab.
      • Locate the control point
    • in the Registration Layer, and click the left mouse button to complete a puncturing operation of the Registration Layer. After puncturing, the layer will identify the control points with numbers, automatically add control point information in the control point list, and display their coordinate values in the control point list, that is, the contents in the source point X and source point Y columns.
      • Click the left mouse button
    • at the same name point of Reference Layer to complete a pricking operation of Reference Layer. After puncturing, the layer will identify the control points with numbers, automatically add control point information in the control point list, and display their coordinate values in the control point list, that is, the contents in the source point X and source point Y columns.
    • Repeat the operation process of 2-3 steps to complete the pricking operation of multiple control points.
  2. Import Control Points
    • On the 3D Registration tab-> Control Point Settings group-> Import button, on the Import Control Points dialog, set the following parameters:
      • Registration point: Set the Dataset where the registration point is located.
      • Reference Point: Sets the Dataset where the reference point is located.
    • Click the OK button to import the specified control point into the current Scene.
    • Repeat the above process to import multiple control points.

Calculate Error

Calculate Error will calculate the error information between the registration control point and the reference control point according to the selected configuration algorithm. The smaller the error is, the better the registration effect is, and vice versa. Registration Info can be used to determine whether to modify the selection of control points to achieve better configuration results.

  1. Select a registration algorithm in the 3D Registration tab-> Operation group. Four common algorithms are available here: Linear Registration, Quadratic Polynomial Registration, Rectangular Registration and Offset Registration. You can select the appropriate algorithm according to your actual needs. Different algorithms have different requirements for the number of registration control points. For the registration algorithm, please refer to Introduction to Registration Algorithm .
  2. In the Calculate group on the 3D Registration tab, click the Calculate Error button to perform error calculation and list the error of each control point in the control point list. These errors include the X residual, the Y residual, and the RMSE. For the specific meaning of registration error, please refer to Introduction to Registration Error .

Perform registration

The Registration button in the Operation group of the 3D Registration tab is used to execute the 3D Registration function. The Registration button is available only when the number of control points in the control point list meets the minimum number of control points required by the current registration algorithm.

  1. On the 3D Registration tab, in the Operation group, click the Registration button to bring up the Registration Result Setting: dialog.
  2. In the dialog box, you can set the Datasource and Dataset Information stored in the registration Result Data.
  3. Click the OK button in the dialog box to perform data registration.

Import and Export Registration Info films

Registration File (*.drfu) stores registration algorithm information and control point information. Each control point information node contains the X coordinate and Y coordinate information of the source point and the X coordinate and Y coordinate information of the target point.

Support the registration of layers in the Registration Window by using the existing control point information. Users only need to import the Registration File (*.drfu) of the existing control points. The operation steps are as follows:

  1. Click the Import button in the 3D Registration tab-> Registration Info group;
  2. Select the *.drfu file in the Import Configuration Information File dialog box;
  3. Click OK in the dialog box to import the control point information into the control point list;

In addition, it is also supported to export the control point information of the Registration Window as a *.drfu file, so as to facilitate the use of the control point information in the same area or Rapid Registration file. The function entry of Export Registration File is 3D Registration tab-> Registration Info group-> Export button.