Autotek autocad raster design 2010 Benutzerhandbuch

Seite von 424
bounding outline The visible element (usually a dotted rectangle) that is
displayed when you select a region. Also called bounding box.
brightness The luminance of pixels in an image. A higher brightness value
makes all the pixels lighter.
CAD Overlay GSX and CAD Overlay ESP Previous releases of ProdNameShort.
CALS Acronym for the raster image format Computer Aided Acquisition
Logistics and Support. CALS files are black and white images used by the US
Government as part of the transition to electronic media. CALS images are
Fax Group IV compressed and are therefore a good way to store black and
white line drawings and scans.
channel A red, green, or blue color signal. Each ProdNameShort color image
is composed of one or more color channels. In a single-band 8-bit image, the
color palette translates the index triplet for each color into a value for each
color channel, with a limit of 256 total colors for any pixel. In a true color,
or 24-bit image, separate red, green, and blue data bands provide color values
to each channel, and each pixel can represent a value from 0 through 255 in
each of the three channels.
The Band Assignment color map for multispectral images assigns image bands
to color channels.
clipped image An image that has been cropped or reduced in area. The regions
of the image that are outside the clip boundary are hidden from view. You
can turn off the clip or you can delete the clip to redisplay all of the image.
Unlike a crop, a clip is a display-only feature that you can use for viewing and
plotting purposes. It does not permanently change image data.
color depth The amount of information stored with each pixel to define its
color or shade. Common color depths are as follows:
Available Color(s)
Type of Image
Color Depth
1 color
Bitonal
1 bit
256 shades of gray
Grayscale
8 bit
16 colors
Color
4 bit
256 colors
Color
8 bit
65,536 shades of gray
Grayscale
16 bit
Glossary | 383