Distance measurement
Measures distance between two points. Click the left mouse button, move to the end point, and release the mouse. Click on the top menu bar or press ESC when finished.
Before making distance measurements, the image can be calibrated as described in Sec.8.9. This will cause the results to be in known units (such as centimeters) rather than pixels.
If the image has been calibrated in a ``2D'' mode, calibrated values are presented for both the x and y dimensions.
Clicking the ``Clear'' button removes the results from the list. The list items can be edited by clicking on the item.
Angle between 2 lines
Measure the angle between 2 lines. Same as distance measurement except it is necessary to click and drag twice. The angle is always given as the most acute of the two angles between the two lines.
Angle of 1 line
Calculates the angle of a line in degrees from horizontal.
Length of segmented curve
Measures total distance along a curve comprised of short segments. After selecting this option, create a segmented curve by clicking at several points along the path to be measured. The program will place a small box at each point, and will connect the boxes with line segments. These boxes can be moved to different positions by dragging them with the mouse at any time.
When you are finished creating and positioning a curve, press the space bar. This will erase the boxes and line segments, and present the total length in a dialog box. The Information box will then reappear, allowing you to select another curve. When finished, click the Cancel button to end measurement mode. A message box is then displayed asking whether to save the list contents in an ASCII file.
Before making distance measurements, the image can be calibrated as described in Sec.8.9. This will cause the results to be in known units (such as centimeters) rather than pixels.
If the image has been calibrated in a ``2D'' mode, total lengths are presented for both the x and y dimensions (this is not terribly useful).
Points
Creates a list of points. This consists of 7 columns:
Shift
The shift function moves an image left/right or up/down within its image buffer. This is useful for multiframe images, to align individual frames that may have been pasted inaccurately.