Score Threshold

Specify the score threshold for a pattern to be found. A pattern in the image is not found if its score is lower than the specified threshold. The default value is 70 points.

To determine the threshold, repeat the find test while changing the position and orientation of the workpiece in the image. Identify the worst score, and set the value obtained by subtracting 5 to 10 points from that worst score.

Lowering the [Score Threshold] forces the GPM Locator Tool to examine many parts of the image where a pattern can potentially be found, thus resulting in a longer location process. Conversely, raising the [Score Threshold] lets the tool narrow down the parts to examine, leading to a shorter location time.

If you need to set the [Score Threshold] to lower than 60, the lens setup or lighting is often inadequate. Before setting a low threshold, check the following: