qnet

This program will create and edit control networks. To run qnet, you will need to create a text file containing a list of all cubes in the control network. There are 3 core windows used in this application.

qnet window

The main qnet window is similar to the qview application. You will see many of the same tools, such as "Band Selection", "Zoom", "Pan", "Stretch" and "Find" along the right border. The "Tie" tool is the last button along the right toolbar. It will be the default tool selected when "qnet" is launched.

In this window, select the "Open network" button or the open action (from File menu), and open the file containing the list of cubes in the network. You will then be prompted for the control network file. If you are editing an existing one, choose that file. If you are creating a new control network, choose the "Cancel" button.

Cubes may be opened in the main qnet window selected from the list in the Control Network Navigator window. Points on these cubes are color coded as follows:

      green "+" control point 

      magenta "+" ground point

      yellow "+" ignore point 

      red "+" point currently being edited (i.e. in Qnet Tool window) 
      
      window) 
    

When the "Tie" tool is activated, the mouse buttons have the following function in the cube viewports of the main qnet window:

      Left Button:  Modify the closest control point

      Middle Button:  Delete the closest control point 

      Right Button:  Create new control point
    

Control Network Navigator window

The Control Network Navigator displays a list of cubes or points in the control network. The user may choose to open cube(s) in the qnet window or filter the list on different attributes. Points - default list for the Control Network Navigator. With this selected, the user may click any of the following buttons:

      "View Cube(s)" to open all cubes containing the selected 
      point(s) 

      "Modify Point" (or double click list 
      item) to edit the point using the Qnet Tool 
      
      "Ignore Point(s)" to set selected points to "Ignore"
      
      "Delete Point(s)" to remove selected points from the 
      control network 
      
      "Filter" to list all points from the currently displayed
      list that meet the new filtering criteria selected.  **Note** If the 
      currently displayed list is already filtered, the new list will only 
      display points that meet the criteria of all filters previously chosen
      until the user resets the list.
      
      "Show All" to reset the displayed list to all points in 
      the network 
    

There are 9 filters for the points list which display the following:

      Error: points with bundle adjustment errors within the 
      user specified range 
      
      Point ID: points whose Point Id contains the user 
      specified string 
      
      Number of Measures: points that are contained in (at 
      least or no more than) the user specified number of images 
      
      Point Type: points that are of the user specified type 
      
      Range: points that lie within the user specified 
      latitudinal and longitudinal ranges 
      
      Distance: points that are within the user specified 
      distance of some other point in the control network 
      
      Measure Type(s): points that contain at least one measure 
      of selected type(s)  
      
      Goodness of Fit: points that contain at least one measure 
      whose Goodness of Fit is within the user specified range 

      Cube Name(s): points that contain at a measure whose 
      serial number matches that of the user chosen cube filename
    

Cubes - With this selected, the user may click any of the following buttons:

      "View Cube(s)" to open all selected cubes  
      
      "Filter" to list all cubes from the currently displayed
      list that meet the new filtering criteria selected.  **Note** If the 
      currently displayed list is already filtered, the new list will only 
      display cubes that meet the criteria of all filters previously chosen
      until the user resets the list.
      
      "Show All" to reset the list to all images in the network 
    

There are 3 filters for the cubes list which display the following:

      Cube Name: cubes whose file name contains the user 
      specified string 
      
      Number of Points: cubes containing (at least or no more 
      than) the user specified number of points 
      
      Distance: cubes that contain at least one pair of points 
      that are within the user specified distance from each other 
    

Qnet Tool window

This is the point editor window of qnet for modifying or creating a point. The window will display the cube that is the "Reference" cube on the left and the next cube in the control point on the right. Only the control measure on the right hand side can be moved. The measure can be adjusted by:

      move to the cursor position under the crosshair by clicking the left mouse button

      move 1 pixel at a time by using arrow keys on the keyboard 

      move 1 pixel at a time by using arrow buttons above the right view
    

Other point editor functions / options include the following:

      In the Options menu:
        Registration: Set or view and save registration 
        templates.
      
      Along the left border of the window:
        Geom:  Geom the right view to match the left view 
        
        Rotate:  Rotate the right view
    
      Below the left view:
        Blink controls:  Blink the left and right view in the
        left view window using the "Blink Start" button (with play icon) and 
        "Blink Stop" button (with stop icon).  The arrow keys above the right view 
        may be used to move the right view in order to update the blinking in real 
        time.
      
        Find:   Center the right view so that the same latitude / 
        longitude is under the crosshair as the left view. 
        
        Add Measure(s) to Point:  Add control measure(s) to the 
        current control point. 
      
      Below the right view:
        Register:  Sub-pixel register the the right view to
        the left view.
        
        Save Point:  Save the control measure under the right 
        view in the control network.