Adept AdeptSight User Guide - Manual (Page 527)

Configuring Point Finder Properties - Advanced
The Advanced Properties section of the Point Finder tool interface provides access to
advanced Point Finder parameters and properties.
Connectivity
Connectivity is the minimum number of connected edges required to generate a point
hypothesis.
By default, Connectivity is disabled. When enabled, you can set the minimum number of con-
nected edges that are required to generate a point hypothesis.
Contrast Threshold Mode
Contrast Threshold defines how contrast threshold is set. Contrast threshold is the level of
sensitivity that is applied to the detection of edges in the input image. This threshold is
expressed in terms of a step in grey-level values. The contrast threshold can be either Adap-
tive or Fixed.
Adaptive thresholds set a sensitivity level based on image content. This provides flexibility to
variations in image lighting conditions and variations in contrast during the Search process.
l Adaptive Low Sensitivity uses a low sensitivity adaptive threshold for detecting edges.
It detects strongly defined edges and eliminates noise, at the risk of losing significant
edge segments.
l
Adaptive Normal Sensitivity sets a default sensitivity threshold for detecting edges.
l
Adaptive High Sensitivity detects a great amount of low-contrast edges and noise.
l Fixed Value sets an absolute value for the sensitivity to contrast. A typical situation for
the use of a fixed value is a setting in which there is little variance in lighting con-
ditions.
Fixed Value Contrast Threshold sets the minimum contrast needed for an edge to be
detected in an input image. The threshold value expresses the step in grey-level
values required to detect edges.
o Higher values reduce sensitivity to contrast. This reduces noise and the
amount of low-contrast edges.
o Lower values increase sensitivity and add a greater amount of edge at the
expense of adding more noise. This may generate false detections and/or slow
down the search process.
Interpolate Position
Interpolate Position sets the mode used by the tool to compute a point hypothesis. By
default, Interpolate Position is disabled. When Enabled, you can select one of the following
modes
Configuring Point Finder Properties - Advanced
AdeptSight User's Guide, Version 3.2.x, Updated: 8/23/2012
Page 527