Calibration Registration

Function Description

Calibration Registration is used to calibrate video shot at rest and is applicable to video shot at a fixed camera position. By adding control points, Calibration Registration uses the X, y coordinate information of the control points to link the position of the registered Dataset with the position of the Reference Data, and registers the spatial position of the registered Dataset to the spatial position of the Reference Data.

Function entrance

  • Video Map tab-> Video Registration-> Registration Mode
  • Video Registration tab-> Display Mode-> Registration Mode

Operating instructions

  1. Create New Registration： Find Registration Mode

    through the two function entries provided and click the Change button to pop up a dialog box for selecting a Reference map. Select Dataset or a map is supported as a reference. Then click the OK button to complete the new Video Calibration Registration.

    Caution:
    The reference Map Coordinate System selected when the

    video enters the Registration Mode must be consistent with the Video Dataset.

  2. Rotation angle: Since shooting can be carried out from the camera point to 360 ° around during shooting, the direction of the obtained video in the Video Map is not consistent with the direction of the Reference map, and the direction of the Reference map is generally defaulted as up north and down south. In order to better display the position of the corresponding control point in the registration process, the Application provides the Rotation Angle function, which can adjust the angle of the Reference map to obtain the same angle of view as the registered video.
  3. Punctures and Modifications:
    • Prick point: Click Video Registration tab-& gt Calibration Registration group-& gt Prick button, Move Stop by Mouse to select the control point in the Video Registration window, and then select the control point at the same position in the Reference map. You can select all the control points in the Video Registration window first, and then select the points of the same name in the Reference map, or select them in the Reference map first, regardless of the order of selection. Make sure that the homonyms of the Registration Map and Reference Map are the same as the control point information.
      • To
    • modify a prick point: To modify the position of a prick point in the Reference map, select the record of the prick point in the prick point list at the bottom of the window and click the Video Registration tab-& gt; Calibration Registration group-& gt Modify button to reselect the prick point location in the Reference map. To delete a thorn point, right click after selecting it, and click Delete in the Context Menu.
    Caution:

    If the video is not a rotating video, the control point only needs to be marked at the 0th second; If it is a rotating video, you need to add the parameters of different moments in the Video Parameters of the Video Layer Properties panel , and then mark the control points of different angles or moments respectively.

  4. Terrain Data: In order to improve the accuracy of measuring points, the Terrain Data function is provided. You only need to select DEM Data in this function, and the elevation value will be automatically obtained when puncturing points.

    Caution:
      In the process of selecting
    • control points, the selected control points should be displayed as "trapezoid" in the Reference map as far as possible, which indicates that the selected control points have high precision. However, if the control point contains an elevation value, it will not be displayed as a "trapezoid" and will not affect the registration effect.
      • In the
    • video, if the Visible Bounds are large and far away (such as the existence of skyline information), You need to set Maximum Y: and Maximum X: in Video Valid Bounds of Video Layer Properties Panel to make the video Visible Bounds: smaller, thereby reducing the degree of video deformation. Improves the Video Registration effect.

  5. Registration Parameters: if known camera parameters can be Input Parameter before Perform registration, it will be matched with the selected control points to improve the registration accuracy. For details of Registration Parameters, please refer to the Registration Parameters description page.
  6. Perform registration: After selecting the control point, click Video registration-> Calibration registration-> Perform registration. The Video Dataset is registered. After registration, the Video Dataset can be overlaid with the map with the same coordinate system, as shown in the following figure.

Related content

Registration Parameters

Video Layer Properties panel

Camera Parameter Registration

Camera Parameter Registration Instance

Calibration Registration instance

SuperMap UAV Survey Video Registration