Setting Up the Pixel Count Presence/Absence Tool

Once the tool has been added, you will need to select the type of region and then configure it within the image to isolate your feature:

From the Region Type drop-down menu, select the type of region: Rectangle (default), Circle, Annulus or Polygon. Position the region over the feature and make sure that the boundaries of the region cover the feature. The boundaries should be configured so that they only enclose the feature you want to measure - if the region is larger than the feature, this may produce inaccurate results because the pixels in the background will be calculated, as well. To help the performance of the tool, create smaller regions; larger regions take longer to inspect. If you’re not using a fixture, ensure that the feature is present in roughly the same location in every image, or the region is large enough to account for the expected movement of the feature.

Note: After adding the tool, you can change the type of region by right-clicking the region in the image and selecting the desired shape from the Change Region to option.
Press the OK button to confirm the region (press the Cancel button to not add the tool to the job).
With the tool initially configured, load several images and adjust the tool's parameters, as needed, to compensate for your expected ranges of variations.
Finally, if desired, use the tool's Input/Output properties to share tool data between other tools and/or other external devices.