Autotek autocad raster design 2010 用户手册
AutoReplace A ProdNameShort option that replaces the image path of a
previously inserted image by matching the drawing name.
previously inserted image by matching the drawing name.
Autorub A ProdNameShort command that removes raster objects as you trace
them with the vectorization tools. This option uses the Rub/Crop line width
to determine the width of the raster that is removed.
them with the vectorization tools. This option uses the Rub/Crop line width
to determine the width of the raster that is removed.
base point A point used for relative distance and angle when moving, copying,
or rotating objects. Example: On the image, select the base point that you
want to move to the destination point.
or rotating objects. Example: On the image, select the base point that you
want to move to the destination point.
bias The ratio of image width to image height, also called aspect ratio. You
can change the bias of an image by using the ProdNameShort ibias command.
can change the bias of an image by using the ProdNameShort ibias command.
bicubic A pixel resampling method that computes the value for a new pixel
based on interpolation of the values in a 4x4 block of surrounding pixels. This
method provides a good compromise between accuracy and speed for most
images.
based on interpolation of the values in a 4x4 block of surrounding pixels. This
method provides a good compromise between accuracy and speed for most
images.
bilinear A pixel resampling method that computes the value for a new pixel
based on linear interpolation of the values in a 2x2 block of surrounding
pixels.
based on linear interpolation of the values in a 2x2 block of surrounding
pixels.
binary image See bitonal image.
bitmap (BMP) An image format. It can be compressed or uncompressed.
Uncompressed BMP files contain raw data on a boundary of 4 bytes per raster.
Compressed files are similar to the run length encoded PCX files, with minor
variations. Only 4- and 8-bit files can be compressed.
Uncompressed BMP files contain raw data on a boundary of 4 bytes per raster.
Compressed files are similar to the run length encoded PCX files, with minor
variations. Only 4- and 8-bit files can be compressed.
bitonal image A two-color, 1-bit image, usually a line drawing such as a
floorplan or parcel map. This image type is also called binary. The background
color of a bitonal image can be transparent or solid. The foreground color can
be any color.
floorplan or parcel map. This image type is also called binary. The background
color of a bitonal image can be transparent or solid. The foreground color can
be any color.
blank distance The distance between dashes in a dashed line.
blurring In ProdNameShort, a method for evenly weighing all pixels in the
kernel, including the target. This filter, while similar to Low Pass #2, gives
slightly brighter results.
kernel, including the target. This filter, while similar to Low Pass #2, gives
slightly brighter results.
blurring artifacts A loss of image detail that can occur with image compression
and resampling techniques. The symptoms include excessive smoothness
where different colors meet, color bleeding, and a loss of color texture.
and resampling techniques. The symptoms include excessive smoothness
where different colors meet, color bleeding, and a loss of color texture.
boundary See frame, image frame.
382 | Glossary