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DetailLevel Property
DetailLevel Property
Applies To
Geometric
Description
Selects the level at which an edge is considered found during the geometric search.
Usage
VGet Sequence.Object.DetailLevel, var
Sequence Name of a sequence or string variable containing a sequence name.
Object Name of an object or string variable containing an object name. The object must exist in the
specified sequence.
var Integer variable that will contain the value of the property.
Values
1 - Medium
2 - High
3 - Very High
Default: 1 - Medium
Remarks
The DetailLevel property determines what is considered an edge during the search. Edges are defined by
the transition in grayscale value between adjacent pixels. The default level (Medium) offers a robust
detection of active edges from images with contrast variation, noise, and non-uniform illumination.
Nevertheless, in cases where objects of interest have a very low contrast compared to high contrast areas in
the image, some low contrast edges can be missed.
If your images contain low-contrast objects, a detail level setting of High should be used to ensure the
detection of all important edges in the image. The Very High setting performs an exhaustive edge
extraction, including very low contrast edges. However, it should be noted that this mode is very sensitive
to noise.
The Smoothness property also affects how edges are extracted.
See Also
Geometric Object, Smoothness Property
Vision Guide 5.0 Reference (Ver.5.3) Rev.1 43