Initializing a supervised classification

Like unsupervised classification, supervised classification is initialized as a session. The initialization procedure also helps you manage subsequent classifications on the same files without re-initializing a new session each time.

Focus automatically assigns red, green, and blue (RGB) values to the first three channels. You can select the exact combination of channels by assigning the color channels that define the reference image for collecting your training sites and for doing any post-classification analysis.

From the Analysis menu, click Image Classification and then click Supervised.
In the File Selector window, locate and select an image file you want to classify.
Click Open.
In the Session Selection window, click New Session.
In the Session Configuration window, type a name for your classification in the Description box.
Note: When naming classification sessions, enter a name in the Description text field that will distinguish your current classification from others you create.