Autotek autocad raster design 2010 用户手册

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NOTE You can define enhanced bitonal region objects only in bitonal images.

An enhanced bitonal region is defined by the selection method you choose,
based either on smart objects or connected objects.

Use this type of object to select complete raster entities such as lines, arcs,
circles, polygons, or text characters in a region. You can define the region by
drawing a rectangular window or a polygon. Use a crossing window or polygon
if you want to include entities that cross the region boundary. You can also
draw a smart polyline or fence to select entities that touch the fence. For
further information, including illustrated examples of smart object selection,
see the following Glossary links: smart crossing polygon, smart crossing window,

 (page 397), 

 (page 397), smart window polygon.

Use this type of object to select complete raster entities based on how they
are connected to each other. This approach makes it easier to either select or
exclude a connected series of entities. You can select entities that are connected
to an entity you select or to a region you define. You can define the region
by drawing a rectangular window or a polygon. Use a crossing window or
polygon if you want to include entities that cross the region boundary or are
connected to such entities. You can also draw a connected polyline or fence
to select entities that touch the fence and all entities connected to these
entities. For further information, including illustrated examples of connected
object selection, see the following Glossary links: connected crossing polygon,
connected crossing window, 

 (page 385), 

 (page

385), 

 (page 386), connected window polygon.

A REM enhanced bitonal region object has four grips, one at each vertex.
Select a grip to move the object.

Defining REM Enhanced Bitonal Regions | 177