S. Höc.

Specify the range of semi-major axis length values for judging the blob to match the model. If the semi-major axis length of the found blob is within the range specified by [Min.] and [Max.], the location succeeds. If [Enable] is uncheck the box, the semi-major axis length will not be checked.
When the minimum rectangle is selected in the Angle Calc Method, the semi-major axis length means the radius of the minimum rectangle.

Specify it when you checked [Calculate Angle].