# Find Circle

The Find Circle tool allows you to determine the presence or absence of a circular edge. The Find Circle tool is able to identify circular edges much faster than the Find Pattern tool.

To add the Find Circle tool to your job:

1. Open the Inspect tool palette, expand the Presence/Absence tool group, and select the Find Circle tool.

2. The tool automatically finds circles on your image, and highlights them in cyan on the acquisition display screen. Click on a highlight to select it as the circle you want the tool to find.
3. Click OK.

To adjust the edge settings:

Use the Polarity setting to change the direction of edge finding between dark and light areas. The available options are black-to-white, white-to-black, and either. By default, the Polarity is set to either.

Adjust the Accept Threshold to change the amount of accordance needed for a passing result using the slider or by providing the numerical value in the Accept Threshold box. Lower the threshold to only accept higher percentage matches, or raise the threshold to accept lower percentage matches as well.

You can also enable advanced tool settings if your job requires more complex configuration. For more information on the advanced tool settings that are available, see Advanced Tool Settings.