Chapter
4
Reference Manual
IVC-2D
88
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SICK AG • Advanced Industrial Sensors • www.sick.com • All rights reserved
Edge
Find Subpixel Edge
This tool scans the gray values along a user defined line and detects a change of gray
values that is at least of the amount of a user defined threshold. Evaluation begins at the
start point of line and returns the coordinates of the first found edge with subpixel resoluti-
on. All evaluation types use a relative threshold and Cartesian coordinates for start and
end point of the line.
Double-clicking on the input field for
Threshold
and double-clicking again on the button that
appears opens a larger image. In this new window you can set the threshold for the requi-
red relative changes of gray values by using a slider on the left side. The first found edge
along the line is marked with a green dot in the image.
Input Parameters
01 = Source bank
Image bank containing the image to be processed.
02 = Type
Always set to
Cartesian
.
03 = Start point X
X coordinate for start point of line.
04 = Start point Y
Y coordinate for start point of line.
05 = End point X,
width, L
X coordinate for end point of line, delta X, distance.
06 = End point Y,
height, angle
Y coordinate for end point of line, delta Y, angle.
07 = Threshold
Threshold for required relative change of gray value to
detect an edge.
08 = Destination Bank
Image bank in which to draw the line that was searched
along, and lines for the returned X and Y coordinates.
Returned Values
01 = X transition
X coordinate of the found edge with subpixel resolution.
02 = Y transition
Y coordinate of the found edge with subpixel resolution.