Instruction
Manual
SCS1
Series
41
Step 4 – Locator selection
Locators track objects with respect to the template position and compensates for translation and
rotation.
Figure 19
This step requires only the selection of the locator. The graph positioning is carried-out in a
successive phase.
The selection is made clicking on the icon of the Wizard panel, using the description supplied.
Click on “Next” to continue.
Blob locator
What is a Blob?
A group of adjacent pixels of the same colour, white or black.
Description
: The
Blob locator
tracks inside a specific area the largest blob.
Blob locators
basically
carry-out two functions: an initial binarization and a successive blob identification. Binarization
allows the user to pass from a grey-tone image to a black and white image. Same-coloured pixel
groups are gathered together and form blobs. The locator is represented graphically by a rectangle,
that forms the ROI
(Region of Interest)
where the blobs are tracked. After the selection of the blob
type to isolate, the locator tracks inside the ROI the largest blob, locating its barycentre coordinates,
to be used in the successive steps as relative reference system’s origin.
Pattern match locator
Pattern match consists in checking the similarity between a template and a target-object. The
Pattern match locator
tracks a target-object inside a specific area and sets the position. The locator
is represented graphically by two rectangles, one inside the other that respectively form the tracking
area (external one marked in blue) and the target-object (internal one marked in orange). During
inspection, the locator tracks inside the blue rectangle an image similar to the target-object in the
orange rectangle.
Measurement location
Location is carried-out by a
Composite locator
. The
Composite locator
isolates the position of
rectangular-shaped objects that have a specific contrast with the background. The tool has also a
rectangular shape and has to be positioned enclosing the object to be tracked. For correct
functioning, the locator must be slightly bigger that the target-object.
Phone: 800.894.0412 - Fax: 208.368.0415 - Web: www.ctiautomation.net - e.mail: [email protected]
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: [email protected]
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: [email protected]
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: [email protected]