The Combine Classes function provides an alternative method for classification generalization. Similar classes can be combined to form one or more generalized classes.
1. From the ENVI Classic main menu bar, select Classification > Post Classification > Combine Classes or review the pre-calculated results of classifying the image by opening the can_comb.img file in the can_tm directory. The Classification Input File dialog appears.
2. Select the can_sam.img file and click OK. The Combine Classes Parameters dialog appears.
3. Select Region #3 from the Select Input Class field, click Unclassified from the Select Output Class field, click Add Combination, then click OK. The Combine Classes Output dialog appears.
4. Click the Output Result to Memory radio button then click OK. The image is loaded into the Available Bands List.
5. Using image linking and dynamic overlays, compare the combined class image to the classified images and the generalized classification image.