# Process a Pretrained Blue Read

Since the tool was trained on a common character size, you first need to adjust Feature Size parameter to match the size of the character in the images to which tool needs to be applied to. The Feature Size indicator graphic is displayed in the bottom left corner of the image (shown below).

You can move and resize the indicator graphic based on the characters in the image. You can resize the indicator by dragging the resize handle, displayed when hovering over the indicator. Changing the size of the indicator also change the Feature Size parameter.

Note: Contrary to the other tools, the Blue Read tool does not reset automatically when changing the Feature Size.

To process the newly created tool:

1. Set 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. in your images.

2. Set the size of the characters with the Feature Size parameter.

3. To process a single image, right-click in the image and select Process from the menu.

4. To process the entire training Training is the process that your tool, which is a neural network, is learning about the features (pixels) based on the labels you made. For example, a tool will learn the defect/normal pixels in each image based on the defect/normal labels you drew. The goal of the tool Training is learning enough to give the correct inspection results of whether an unseen image is defective or not. The key to training is to ensure that you include all possible variations within your training set, and that your images are accurately labeled. Training times vary by the application, tool setup and the GPU in the PC being used to train the network. set, click the Book icon.