Column Profile Plot Column Profile Plot
A Column Profile plots the pixel values along a line parallel to the image columns. The column(s) to be plotted are located using the Image Cursor. This type of plot shows changes in image luminance, or pixel value, in the vertical direction.
You can also create a column profile plot using the Line Profile tool to draw precisely along a single column.
This command plots the following types of profiles:
Single Column
Averaged Column. Various methods are available for combining the columns; see Plot Averaging Mode.
Range of Columns showing multiple rows on the same graph.
If the Image Window has 2 or more images in an Image Set, Mira can make the above types of plots for the entire image set or dfor only the top image; this is controlled by the state of the Graph Image Set mode.
The Window Caption describes the type of plot that is displayed:
An Average Column Profile plot has the suffix [ACP] in the window caption.
A simple Column Profile of one column has the suffix [CP] in the window caption.
Making a column profile plot involves two steps
Adjusting the image cursor to cover the desired pixels, and
Clicking the plotting button or executing the menu command to create the plot.
Set the command mode to Cursor Mode.
Click the mouse on the image to position the Image Cursor.
Adjust the corners or edges of the Image Cursor until it defines the region you wish to average. Combine moving and sizing operations to get the image cursor where you want it.
Execute the Plot > Column command in
the menu or click the 
button to make the
plot.
Mira can combine the neighboring columns and plot the result as a single line of data. Mira provides different options for combining the adjacent lines to create the plot; see Plot Averaging Mode.
Set the command mode to Cursor Mode. If the image cursor is a rectangle, it outlines the region to be averaged into a single column. If it is a crosshair, the averaged region is the number of columns spanned by the crosshair. In both cases, the same number of columns will be averaged.
Combine moving and sizing operations to get the image cursor where you want it. Click the mouse on the image to position the cursor and adjust the corners or edges until it defines the range of columns to average.
Select the column combining method by choosing
an option in the Combine Mode submenu of the buttons' drop menu or use the image Plot menu or
Image Context
Menu. The name in the menu adjusts to the selected method.
Execute the particular [Combined Column] command in the menu. The plot title depends on the currently selected Averaging Mode. Also see Plotting an Averaged Line.
Set the command mode to Cursor Mode. If the image cursor is a rectangle, it outlines the region of columns to be plotted. If it is a crosshair, the span of the crosshair defines the number of columns to be plotted. In both cases, the same number of columns will be plotted.
Combine moving and sizing operations to get the image cursor where you want it. Click the mouse on the image to position the cursor and adjust the corners or edges until it defines the range of columns to plot.
In the plotting menu set the Plot Series Mode to Overplot and then use the Range of Rows command. You can later change the Plot Series Mode from the Plot Window using its Context Menu.
After you have made the plot, the attributes can be changed using the Plot Attributes dialog. This includes properties such as the minimum and maximum extent of the axes, the tick marks, axis labels, fonts, colors, and more.
Row Profile Plot, Line Profile Plot, Plot Animation Toolbar, Plot Coordinate Systems, Plot Attributes, Copy and Paste Commands for Plots, Plotting an Averaged Line