.. toctree::
    :maxdepth: 1
	
Generating Subset Collection for 2D Subset-DIC
===============================================

* Open the :doc:`../components/gui/preprocessor`
* Set the "Camera Mode" DropDown List to "Camera 1" (optional)
* In the :doc:`../components/gui/impanel` , load the first image in the image sequence you want to analyze.
* Open the :doc:`../components/gui/tools/subsetedit`
* In the :doc:`../components/gui/tools/subsetedit` choose **Add Subsets**.

The :doc:`../components/gui/tools/subset/addsubset` appears and ask for some parameters of the subsets to be added.

.. image:: ../components/gui/tools/subset/imgs/addsubset.png
	:alt: alternate text
	:align: center

For a 2D subset DIC-analysis you may define:
	* The size of the subset (default = 20)
	* Wether the initial subset location should be optimized or not. If you are tracking a checkerboard pattern, you may here choose **Corner Finder**. Otherwise, choose **No Optimization**. 

When the "OK"-buttin is pressed in the :doc:`../components/gui/tools/subset/addsubset` an action called **Click to define center of subset** will be active in the current view.

* Click on the image to define subsets. Each mouse-click during this action will add a subset to the subset collection.

In the image below a single subset has been added at the tip of a projectile.

.. image:: imgs/subsetadded.png
	:alt: alternate text
	:align: center

.. hint::
	The subset tracking analysis assumes small deformations/movements of the subset(s) between succeeding images (same as for standard DIC with mesh). To overcome large "jumps" in displacement bewteen
	succeeding images, it is possible to define a :doc:`subsetvelocityvector` to the subsets. 

* When you are happy with the subset collection, you can save it as a file (*scol).

.. image:: imgs/savescol.png
	:alt: alternate text
	:align: center
	:width: 250

.. hint:: 
	It is not required, but you may want to save the subset collection in a subfolder under the image folder, where you also save the input file (in the next step).
	
You are now done making the subset collection for a 2D Subset-DIC analysis.

* Remember where you saved the subset collection file (*.scol) and close the :doc:`../components/gui/preprocessor`