Editing Marks in Image Window

Creating and editing marks in the image are done by using a mouse in the image windows. The basic marking methods are summarized below:

• Creating a new point in the Photo4D database: clicking the left button at location (i,j) of image P does three things: First, it creates a new point in the Photo4D database; second, it puts a mark for the new point at the location of (i,j) in image P; and third, it sets the point as the current point.
• Selecting a current point: clicking the left button on a mark moves the current point to that mark. For example, if you move the cursor to a mark of "Point X" in an image window and click the left mouse button, this mark and the corresponding "Point X" mark in other images will be highlighted with a purple outline.
• Deleting a point: double clicking the left button on a mark deletes the point of this mark.
• Adding a mark to the current point: clicking the right button at location (p,q) of image P adds a second mark at location (p,q) of image P to the current point.
• Deleting a mark from a point: double clicking the right button on a mark deletes the mark. Corresponding marks in other images are not affected. If the point has no other corresponding mark, then the point is deleted.
• Merging two points: clicking the right button on a mark that corresponds to the current point merges that mark to the current point.
• Editing the location of marks: Press the key and use the right mouse button to drag a mark to a new location. Specifically,
  1. Move the cursor to a mark
  2. Press key and then the right mouse button, but do not release;
  3. Move the cursor with the right button pressed. This drags the mark wherever the cursor moves;
  4. Release the key and the right mouse button. This leaves the mark at the location where the button is released

It is easy to remember the editing actions according to the mouse buttons.