====== 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 Top Down operators //TA_Baatz_Segmenter// and //Dummy Top Down//, and the Bottom Up operator //Generic Bottom Up//. 

===== Download =====

{{:interimage:examples:ta_interimage_examples_rule_based_classification.zip}}

===== Step-by-step =====

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

{{:interimage:examples:new_project_rule_based_classification.png?400}}

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

{{:interimage:examples:nodes_rule_based_classification.png?600}}

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

{{:interimage:examples:rule_based_classification_bottomups.png?400}}

To classify, one can use the attribute //ratio// for band 1, as follows:

  * //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 one inserts 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.

{{:interimage:examples:rule_based_classification_background_rules.png?400}}

After inserting the rules and starting the project, the resulting classification will look as follows:

{{:interimage:examples:result_rule_based_classification.png?600}}