<2> Do a scale search within the range specified by the upper and lower limits
For example, suppose that you teach the geometry shown in Fig.(i) and that the image captured by the camera shows the workpiece having the same geometry but expanded by 3%.
If you specify <1>, scale is ignored in the search. The tool pays attention only to the scale specified by the [Nom.] and finds those patterns that are not expanded like the one shown in Fig.(ii). Any deviation in scale is regarded as geometrical distortion, and the score is reduced as much.
If you specify <2>, a scale search is done within the range specified by the [Min.] and [Max.] limits. Therefore, a pattern like the one shown in Fig.(iii) can also be found as a fully matching pattern.
In the case of <3>, care must be taken because a pattern is not found if its scale is outside the range specified by the [Min.] and [Max.] limits, regardless of how slightly.
The time the location process takes is shorter in the case of <1> than <2>. If you specify <2>, the location process takes less time when the scale range is narrower.