# String Model

The string model is the simplest model to use and define; you simply define the minimum number of characters you expect to find, along with the angular variation of the characters from the horizontal boundary of the ROI that you expect to encounter in your images.

To use a string model, do the following:

1. After adding the tool, configuring the ROI and setting the character Feature Size, process the tool (press the Book icon).

2. To create your string model, from the Tool menu, select Edit Models, and from the Model Editor dialog, select String Model.

3. Enter the number of characters the string should contain in the Minimum Length field.
4. The tool will return the specified number of characters that are present in the ROI. The matched characters must lie along a single horizontal line, which is defined by using the Angle parameter, and is the allowable deviation from the horizontal axis of the ROI.
5. Close the dialog by pressing the X button in the top-right corner of the dialog.
6. The model will then be applied to the view that was open when the Model Editor was launched.
7. Process the tool (press the Book icon) to apply the model to the rest of the views.
8. Review the results. For more information, refer to the Working with Labels and Models topic.