Divisão de Observação da Terra e Geoinformática

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====== Multiresolution Segmentation ======

This example shows how to perform multiple segmentation in the image, using coarse and fine resolutions. We use three methods for segmentation currently available in InterIMAGE, namely //Region Growing//, //Baatz// and //Checkerboard//. 

===== Download =====
{{:interimage:examples:ta_interimage_examples_multiresolution_segmentation.zip}}

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

Create a new project called "multiresolution_segmentation".

Afterwards create a structure to perform segmentation. We initially create a node called "coarse_segmentation" which applies the //TA_Region_Growing_Segmentation// operator. We also create three child nodes, called "fine_segmentation", "fine_checkerboard", and "background" with //TA_Baatz_Segmentation//, //TA_Checkerboard_segmentation// and "Dummy Top Down" operators respectively. The node "background" will be associated to the remaining elements.

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

The segmentation parameters used were:
  * //coarse_segmentation// (TA_Region_Growing_Segmenter)
    * Euclidean Distance threshold: 40
    * minimum segment size: 200
    * //fine_segmentation// (TA_Baatz_Segmenter)
      * Compactness weight: 0.5
      * Color weight: 0.5
      * Scale parameter: 20
      * Decision rule:
        * mean('b1') < 240 AND mean('b2') < 240 AND mean('b3') < 240 
    * //fine_checkerboard// (TA_CheckerBoard)
      * Number of grid lines: 10
      * Number of grid columns: 10
      * Decision rule:
        * ratio('b1') > 0.4
    * //background// (Dummy TopDown)

Insert these rules in the 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:new_fine_segmentation_multiresolution_segmentation.png?400}}

After running your project, the result should look as the following figure:

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