Autotek autocad raster design 2010 用户手册

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NOTE If you want to match the image rotation, use the Deskew option. If
you want to move or scale the image as well as rotate the image, use the
Match option. For more information, see 
 (page
82) and 
 (page 28).
Quick Reference
Menu
Image  ➤  Correlate  ➤  Scale
Raster Design Toolbar
Command Line
iscale
Rubbersheeting an Image
You can transform an image to correct distortions in distance and shape.
Image distortions can sometimes prevent you from aligning an image in your
drawing. For example, correlation by scanning or matching may not work on
aerial photographs that include distortions caused by parallax, unevenness of
terrain, or lens distortion. In these cases, you can use rubbersheeting to
permanently correct most of the distortions in an image.
Rubbersheeting uses a set of matched control points, consisting of source
points in the image and destination points in the drawing. You can specify
these points by picking them directly in the drawing, or by establishing a grid
of destination points, to which you match source points. Once these control
points are established, the image is transformed so that the points align as
closely as possible.
NOTE If you are using AutoCAD Land Desktop, you can substitute COGO points
by typing .p, .g, or .n when ProdNameShort prompts you to enter destination
points. For more information, see 
 (page 82).
Rubbersheeting an Image | 31