Autotek autocad raster design 2010 用户手册
rubbersheet To match points in an image to known reference points in a
coordinate system by warping the image using a triangular or polynomial
transformation.
coordinate system by warping the image using a triangular or polynomial
transformation.
run-length coding A data compression method that replaces a run or sequence
of identical data units (such as pixels) with a single unit and the length of the
run.
of identical data units (such as pixels) with a single unit and the length of the
run.
saved path The image file name saved in the drawing. It can be a simple file
name, a local path, a network path, or an Internet address.
name, a local path, a network path, or an Internet address.
scale The defined dimensional relationship between units of linear
measurement on the earth’s surface and those on a map or aerial photo.
measurement on the earth’s surface and those on a map or aerial photo.
scaling A method of proportionally changing the size of a raster image in
reference to existing raster or vector entities without rotating it.
reference to existing raster or vector entities without rotating it.
shading The use of marking made within outlines to suggest
three-dimensionality, shadow, or degrees of light and dark in a picture or
drawing. Example: You can use the sharpening filters on grayscale images to
make differences in shading more distinct. It may be necessary to use
sharpening filters to extract the highest amount of useful data from a low-
resolution scan.
three-dimensionality, shadow, or degrees of light and dark in a picture or
drawing. Example: You can use the sharpening filters on grayscale images to
make differences in shading more distinct. It may be necessary to use
sharpening filters to extract the highest amount of useful data from a low-
resolution scan.
sharpening filters A device for enhancing details in images. Sharpening filters,
with the exception of the matched filters, use spatial filtering with a 3x3-pixel
kernel.
with the exception of the matched filters, use spatial filtering with a 3x3-pixel
kernel.
Show Image Frame(s) An option on the Image Mask tab of the Raster Design
Options dialog box. Shows the frames of the images that are hidden or
unloaded.
Options dialog box. Shows the frames of the images that are hidden or
unloaded.
SID (MrSID) Multiresolution Seamless Image Database. A highly-compressed
image format from LizardTech, Inc.
image format from LizardTech, Inc.
Single Image Optimization A ProdNameShort feature that automatically
selects your image when you run a ProdNameShort command that requires
an image to be selected. You are prompted to select an image only if you are
working with multiple images.
selects your image when you run a ProdNameShort command that requires
an image to be selected. You are prompted to select an image only if you are
working with multiple images.
smart crossing polygon A selection method for enhanced bitonal region
objects. This method selects all raster entities that lie within or cross into the
polygon you draw. If any part of the entity crosses the polygon boundary, the
entire entity is selected. In the following example, note that the horizontal
lines and the circle are selected because they cross the polygon boundary.
objects. This method selects all raster entities that lie within or cross into the
polygon you draw. If any part of the entity crosses the polygon boundary, the
entire entity is selected. In the following example, note that the horizontal
lines and the circle are selected because they cross the polygon boundary.
396 | Glossary