Rule-Based Classification

This example shows how to perform a single classification of pools and roofs through rule-based classification.

This project is called “rule_based_classification” and uses the Tow Down operators TerraAIDA_Baatz_Segmenter and Dummy Top Down, and the Bottom Up operator Generic Bottom Up.

The InterIMAGE interpretation project can be downloaded here: ?????

Start InterIMAGE, click on File, New Project, and type the fields according the following:

Now insert three nodes, namely pools, roofs and background. All these three nodes will have the Top Down operator TerraAIDA_Baatz_Segmenter, as showed below.

All nodes, including node Scene, will have the Bottom Up operator Generic Bottom Up, with the following rule:

To classify, we can use the attribute ratio for band 1, as the following:

• pools
  • ratio(band 1) < 0.3
• roofs
  • ratio(band 1) > 0.4
• background
  • ratio(band 1) >= 0.3 AND ratio(band 1) < = 0.4

Then we insert these rules in the three nodes, by clicking in TopDown Decision Rule. Note: Select the option No Merge, as the Lower-level Rule for all Top Down nodes.

After inserting the rules and starting the project, the resultant classification will show as the following: