Registering Reconstruction

Source file: register-photogrammetric-reconstruction.htm

You only need to register a photogrammetric reconstruction if registration from GPS coordinates is unsatisfactory or unavailable. To do so, click on the Register Reconstruction button on the Photogrammetry ribbon tab, then follow the steps below.

1. Select the required sparse point cloud in the project explorer. It will be automatically added to the Sparse point cloud field.

2. Choose the registration method:

   • Pick ground control points to register to specific survey points.

   • Register to existing data to register to existing scans.

3. Click Next >.

4. Expand below according to the chosen method:

   Pick ground control points

   

   1. Choose an image.

   2. Identify a survey point in the project data and drag its container into the Survey points container field.

      Note:  If there is no a suitable survey point you will need to create one. See Creating Survey Points.

   3. If asked to apply a new coordinate system, click Yes.

   4. Select the corresponding point on several images.

      Tip:  Select Only show likely images to filter out images that the software determines don't include the survey point.

   5. Repeat for other survey points.

   Register to existing data

   

   1. Drag suitable registered scans into the Fixed reference data field.

   2. Select the appropriate Sampling level and Quality of fit. The higher these settings, the more accurate the results will be, but the longer the registration will take.

   3. Select Perform rigid registration with non-rigid initialisation to register using settings to help prevent the scale of the result being blown out of proportion at the expense of speed and accuracy.

5. Click Next >

6. When the registration has completed, check that the registration is correct in the display.

7. Repeat the registration process as many times as necessary to achieve a satisfactory result, adjusting settings each time.

8. Click Finish.