Autotek autocad raster design 2010 用户手册

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页码 424
true coordinate transform A type of coordinate transformation that can be
applied to images upon insertion. This option applies to each pixel of the
image, and produces the most accurate results. See also 3-point affine transform
and 4-point rubbersheet transform.
unembed To remove an embedded image from a drawing. The unembedded
image must be saved as an independent file. See also embed.
unload To remove image data from the display and the working memory of
a drawing. The image frame remains visible, and the image object remains in
the Image Manager toolspace tree. To reverse an unload operation, do a reload.
See also detach.
vector A mathematical object with precise direction and length, but without
specific location. Vector data is stored as XYZ coordinates that form points,
lines, areas, and volumes.
vectorize Converting a bitonal raster image to vector data. You can use the
ProdNameShort vectorization tools to vectorize a raster image. See also follower,
VTools.
VTools ProdNameShort vectorization tools used to manually convert bitonal
raster arcs, circles, lines, or rectangles to equivalent vector objects.
VTools Removal A setting on the VTools General tab of the Raster Design
Options dialog box that controls what happens to the underlying raster entity
when vectorization tools are used to vectorize the raster entity. Depending
on the Removal Method setting you choose, the raster entity can be rubbed
or REM deleted.
wavelet Multiple resolution image files compressed to a small fraction of their
original size.
world file A file that stores correlation information for an image, consisting
of scale, rotation, and insertion point. World files can be created by the Export
command to correlate an image in another graphics application. The world
file is in ASCII format that you can view using Notepad. World files are saved
in the folder where the image is located. Their extensions vary, depending on
file type, but always end in w. Examples:
BMP - bpw
GIF - gfw
IG4 - i4w
TIFF - tfw
400 | Glossary