Autotek autocad raster design 2010 用户手册

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Create an enhanced bitonal region object to select one or more raster
entities. For more information, see 
(page 176).
To remove part of a region object
Select the region object you want to modify.
Right-click, click Remove, and select a removal method. For more
information on the methods, see 
(page 176).
Define the area that you want to remove from the first REM object.
Quick Reference
Menu
Image  ➤  Raster Entity Manipulation  ➤  Remove Data From Region
REM Toolbar
Object Shortcut Menu
Right-click REM region ➤ Remove ➤ (select removal method)
Command Line
iremove
Defining REM Enhanced Bitonal Regions
Define a REM enhanced bitonal region when you want to select complete
raster entities within a bitonal image.
For example, you might be working with an image of a mechanical drawing
that contains a plan view of a cylinder. You want to scale the size of the
cylinder hole to make it larger. You can accomplish this by selecting the
cylinder as an enhanced bitonal region object. You can then use this object
to quickly scale the size of the cylinder, without touching any other part of
the image.
176 | Chapter 7   Raster Entity Manipulation