# Create a Node Model in Blue Read

To use a node model A specific spatial arrangement of a set of features (Blue Locate and Blue Read tools only.) During a post-processing step, the Blue Locate and Blue Read tools can fit all of the features detected in an image to the models defined for the tool. The overall pose and identity of the model is then returned., do the following:

1. After adding the tool, configuring the ROI The Region of Interest (ROI) defines the area of operation for the tool. The ROI preserves the positions, angles, stretch and skew of the original image. () and setting the character Feature Size (), process the tool (press the Book icon).

2. Select all of the yellow found characters you want to include in the node model (shift-click or shift-drag to draw a box), then right-click over a selected character and select Create Model.

   Note: If you select Create Model with nothing selected, then the model will be created from all of the features found in the image.

3. Define your node model within the Model Editor dialog.

4. For each node within the model, you can refine the characteristics of the node, such as specifying if it should be a numeric digit or an uppercase letter character (the default is that the node can be any type of character).

   To specify characteristics of a node, select the node, which will open the Node settings for the selected instance.

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 A view of an image is a region of pixels in an image. Tool processing is limited to the pixels within the view. You can manually specify a view, or you can use the results of an upstream tool to generate a 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.