A Line Profile Plot is made by drawing a
line on an image displayed in an
Image Window. There are several
options that determine the plotted data and its
appearance on the
Image Window. Options include using world coordinates
and centroiding on the endpoints. The following is an example of a
line profile plot:
Notice that the plot X AXIS shows distance rather
than coordinates. The line plot is generally drawn at an angle, so
it has no attachment to either column or row coordinates.
Line Profile Commands
This command can be operated from a Window Toolbar
or from a Menu extending from the button on the
Image Plot Toolbar.
Note that additional commands are available from
the drop button next to the button
on the main
Image Plot Toolbar.
Procedure for Creating a Line Profile:
Be sure the target Image Window is on top of the
Window Stack and has focus. Adjust image magnification and position
so you can see the region you want to plot.
Move the mouse pointer to the first image point
and click mouse down.
Drag the rubber band line to the final image
point and release the mouse button. The line profile plot appears
in a new
Plot Window.
To add an another plot series for the profile at
an offset position, enter move mode, grab the line, and move it to
a new location. The plot will add to the window where you release
the mouse button. This is described below. See
Adding Series to a Line Profile Plot.
Going Further: Adding Statistics to the Line Profile Plot
The Plot Window below shows further
processing by adding statistics for the plot series.
The illustration above was created using the
steps below. This procedure marks several plot series in the Plot
Window which are shown with different colors and line thicknesses.
These are specified as follows:
The series color and line thickness are
specified before making the plot in the
Image Plot Properties dialog.
The series color and line thickness may be
changed after making the plot using the
Plot Series Properties dialog.
Procedure:
Bring the target
Image Window to the top of the window stack.
Open the Line Profile Toolbar using the
button on the main toolbar or the Plot >
Line Profile Toolbar command in the main menu
On the Line Profile Toolbar, select
Marking mode and draw the first profile line on the
image.
On the toolbar, enter Move mode. Grab the
first profile line and move to a new location. Release the mouse at
the new location.
Repeat step 2 at a third location. Steps 2 and 3
have created a total of 3 plot series in the
Plot Window.
Select a statistic to compute for all plot
series: To open the statistics selection, either right-click the
on the
Plot Bar or use the the Measure
> Statistics Properties submenu from the main
Plot Window menu at the top of the Mira desktop. In
the
Statistics Properties dialog, select the
statistic and set its parameters as needed.
Click the button to
compute the statistics for all plot series. The Statistics pane
will open containing the measurements.
In the Statistics
pane, left-click on the statistic you want to draw in the plot
window. In this example, the median statistic was selected for
series # 2. The target grid cell is highlighted in green.
In the Statistics
pane, right-click on the series you want to mark, then select
Mark Statistic from the pop-up
menu.
To plot a different statistic, repeat steps 7
through 9.
Creating
a Line Profile
to enter Marking
mode.
on the
