Score Threshold

Specify the threshold for how much contrast (difference between light and dark) is required in the image to identify something as a feature. A pattern in the image is not found if its average contrast is lower than the specified threshold. The specifiable contrast threshold value range is 10 to 255. The default value is 50.

To determine the threshold, repeat the find test while changing the position and orientation of the workpiece in the image. Identify the lowest contrast, and set the value obtained by subtracting 10 or so from that lowest contrast.

Contrast depends on whether ambient light is present. Test whether ambient light is present.
A higher contrast threshold leads to a shorter location process. If you set the contrast threshold to lower than 20 for the find test, check the following.