ParameterDescriptionRaster(Required)The input raster for which the identified zones are to be shrunk.It must be of integer type.Number Of CellsThe number of cells by which to shrink each specified zone.The value must be integer, and can be 1 or greater.Zone Values(Required)The list of zones to shrink.The zone values must be integer, and they can be in any order.To specify multiple zones, use a space to separate the zone values.

The specified zone values are considered foreground zones, while the remaining zone values are considered background zones. With this tool, cells in the foreground zones are allowed to be replaced by cells in the background zones.

NoData has the same priority as any valid value to invade areas vacated by shrinking selected values. Therefore, if a selected value is adjacent to NoData, it may become NoData after shrinking.