# Region

Creates a fixtured Region structure.

## Region Inputs

Parameter | Description
Image | This argument must reference a spreadsheet cell that contains a valid Image data structure. By default, the cell referenced is $A$0, which contains the image data structure returned by .
Fixture | Specifies the image coordinate system in which the region is defined.
Row | The row offset.
Column | The column offset.
Theta | The orientation.
Region | Specifies the position, size, rotation, and curvature. Regions are always defined within the coordinate system of a Fixture.
X | The X-offset of the origin, in fixture coordinates.
Y | The Y-offset of the origin, in fixture coordinates.
High | The dimension along the X-axis of the region.
Wide | The dimension along the Y-axis of the region.
Angle | The orientation, in fixture coordinates.
Curve | The angular deviation between the X-axis of the region and the opposing boundary line.
Show | Specifies the display mode for the Region graphic overlay on the image.
0 = hide all (default) | The region structure graphic is hidden unless the cell containing the Region function is highlighted in the spreadsheet.
2 = input graphics only | The region structure graphic is always displayed.

Note: The Fixture and Region parameters must be defined within the bounds of the image. Otherwise, the function returns #ERR.

## Region Outputs

Returns | A region data structure, or #ERR if any of the input parameters are invalid.
Results | When Region is initially inserted into a cell, the following Structures Vision Data Access functions are automatically inserted into the spreadsheet to create a result table:
Label | Function | Description
X | GetX(Region) | The X-coordicate of the origin of the region, in image coordinates.
Y | GetY(Region) | The Y-coordicate of the origin of the region, in image coordinates.
Height | GetHeight(Region) | The height value.
Width | GetWidth(Region) | The width value.
Angle | GetAngle(Region) | The orientation, in image coordinates.
Curve | GetCurve(Region) | The angular deviation between the X-axis of the region and the opposing boundary line.