Omron FZ3 Series User Manual page 266

PT
Note
Basic selection flow
8
Search Speed
For processing items to perform search processing such as [Search] and [Classification], you can
specify the search processing speed by through the model parameter items "Stab.", "Prec.", and/or
"Skipping angle". If the value specified for "Stab." or "Prec." is small or if the value for "Skipping angle" is
large, the processing speed can be increased since the amount of information for the models will be
decreased during the search. In contrast, if the values specified for "Stab." or "Prec." are large or if the
value for "Skipping angle" is small, the processing speed is slow because search is performed without
the amount of model information being reduced. Specify appropriate values for "Stab.", "Prec.", and
"Skipping angle" according to the measurement conditions.
Correlation value
With processing items that use search processing, judgement is performed through correlation values.
Correlation values are used to check the consistency (degree of similarity) between actual measurement
images and reference model images. If portions of a measured image are missing or if shapes are
264 Measurement Mechanism
Measurement for locations where there is a high degree of similarity between the shape of the
model registration image and the input image is performed. Since measurement is based on shape
consistency (profile of model), positions can be measured accurately even if portions of the model
are missing in images.
When the rotation angle range is wide (such as full angle), a search that is faster than a "CR" search
can be performed.Note, however, that this method may be less reliable than a "CR" search if the
image has low contrast or blurred edges.
FZ3 User's Manual