Refining 3D Model

You can refine the 3D model to improve the reconstruction.

This task shows you how to:

Before you begin: Reconstruct a 3D model from images.

Refining 3D Model in Canonic Views Mode

In canonic views mode, you can use the manipulators to resize the 3D model top and bottom sections.

  1. From the Reconstruction section of the action bar, click Front/Side Creation .
    Important: This command is only available if you reconstruct a 3D model from canonic views.
  2. To resize the top and bottom sections, use the manipulators in the 3D area.

The 3D model is automatically updated.

Refining 3D Model in Multiple Perspective Views Mode

In multiple perspective views mode, you can refine points to improve the system result in terms of retroprojection error.

Note: The refining process can only be done on 2D images after a first 3D reconstruction.

  1. From the Reconstruction section of the action bar, click Display Diagnostic .
  2. In the Image Gallery, click to display the details of the images.
  3. Review the following information:
    • The color status of each image.
    • The retroprojection error information of each image.

    Notes:
    • The retroprojection error information provides the distance between the projected 3D point in image plane (the captor of the camera) and the pixel point corresponding to this 3D point.
    • Retroprojection error of the last update appears as a dashed circle.

  4. In the Image Board, refine the point where a retroprojection error, symbolized by a solid red circle, is detected:

    1. Move the point as close as possible to the red circle center.

      Note: The center of the red circle shows where the 3D point is projected on the image.

      Retroprojection errors for each point are computed according to the modification:
      • If the retroprojection error is lower than the previous one, the red circle disappears.
      • If the retroprojection error is higher than the previous one, a warning appears. It means that the current modification might be better on this image but it increases errors in the global system.
    2. Optional: If the result of the move is not satisfying, undo the modifications done in Step a.