Epson 5 - Manual (Page 65)

Extrema Result
Extrema Result
Runtime only
Applies To
Vision Objects: Blob
Description
Returns the blob extrema coordinates.
Usage
VGet Sequence.Object.Extrema [(result)], varMinX, varMaxX, varMinY, varMaxY
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.
varMinX Real variable containing minimum X position of the blob's Extrema.
varMaxX Real variable containing maximum X position of the blob's Extrema.
varMinY Real variable containing minimum Y position of the blob's Extrema.
varMaxY Real variable containing maximum Y position of the blob's Extrema.
result Optional result number. If omitted, the result number is the CurrentResult. Used for objects
that return multiple results.
Values
The values returned are always in pixels and may be from 1 - video height.
Remarks
The MinX, MaxX, MinY, and MaxY results together define a blob's smallest enclosing rectangle that is
aligned with the coordinate axes and completely encloses the blob. This rectangle is known as the extrema.
The Extrema result enables you to retrieve all four coordinates in one command.
The Extrema value can be fractional. For example, 100.5 would be between the 100 and 101 pixels.
See Also
Area Result, MinX Result, MaxX Result, MaxY Result, MinY Result, Object Tab
Vision Guide 5.0 Reference (Ver.5.3) Rev.1 51