Epson 5 - Manual (Page 144)

Roughness Result
Roughness Result
Applies To
Vision Objects: Blob
Description
Returns the roughness of a blob.
Usage
VGet Sequence.Object.Roughness [(result)], 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 Real variable that will contain the value of the result.
result Optional integer result number from 1 to the NumberToFind property. If omitted, the result
number is the CurrentResult.
Values
Minimum value is 1.0.
Remarks
Roughness is a measure of the unevenness or irregularity of a blob's surface. It is the ratio of the true
perimeter to the convex perimeter of a blob. The convex perimeter is the length of a line connecting all the
extremities of the blob directly, while the true perimeter is the length of a line connecting every pixel along
the blob's edge. Smooth convex blobs have a roughness of 1.0 (the minimum), whereas rough blobs have a
higher value because their true perimeter is bigger than their convex perimeter.
See Also
Compactness Result, Holes Result, Perimeter Result
130 Vision Guide 5.0 Reference (Ver.5.3) Rev.1