Edge PresencePlus P4, User Manual, Page: 83 / 182

01/05
P/N 120413
75
User’s Manual Edge Tool Setup
Banner Engineering Corp. • Minneapolis, MN USA
www.bannerengineering.com • Tel: 763.544.3164
ROI Width
-------------------------------------------------------------------------------------------------------
-------------------------------------------------------------------------------------------------------
Example:
The images below show how a narrow ROI could miss the part if the part shifts up or down.
------------------------------------------------------------------------------
------------------------------------------------------------------------------
---------------------------------------------------------
Widening the ROI, as shown below, makes it wide enough to always detect the thin bars. This wider line results in the tool
consistently finding one edge every time.
----------------------------------------------------------------------
-------------------------------------------------------------------------------------
More About Widened ROIs
If the width of the ROI is greater than 1, the gray scale levels of the pixels are averaged along the width of the ROI. The
averaged value helps smooth out jagged edges.
---------------------------------------------------------------
ROI Width (default: 1)
-
Width can be increased in increments of 4 pixels (1, 5, 9, 13, ...) up to the total FOV size.
- Narrow ROIs execute faster but could miss the part (see below).
- Wide ROIs are more consistent but don’t execute as fast.
- A high filter number may miss the edge of a narrow line.