Autotek autocad raster design 2010 User Manual
parallax The apparent displacement of position of an object, caused by a shift
in the point of observation.
in the point of observation.
PCX A simple run-length encoded image format.
Pick < A ProdNameShort device for selecting points on the screen.
PICT An image format created by Apple Computer.
pixel A single dot on the screen. Pixels are the building blocks of raster images,
and are individually assigned different colors or shades of gray. Image pixel
size varies depending on the resolution of the image. A 2X2 pixel in a 400 dpi
image is one quarter the area of a 2X2 pixel in a 200 dpi image.
and are individually assigned different colors or shades of gray. Image pixel
size varies depending on the resolution of the image. A 2X2 pixel in a 400 dpi
image is one quarter the area of a 2X2 pixel in a 200 dpi image.
pixel size Image density expressed as the area of a pixel, typically used with
aerial photography and satellite imagery.
aerial photography and satellite imagery.
PNG Portable Network Graphics. A raster image format.
positive image An image in which the light and shade areas correspond to
the original image.
the original image.
PPI Pixels per inch. Also called dpi, or dots per inch. See also DPI.
projection Data devised by cartographers and mathematicians to depict
three-dimensional shapes (like the earth) on two-dimensional surfaces with
known distortion.
three-dimensional shapes (like the earth) on two-dimensional surfaces with
known distortion.
quad sheet A device for reducing image file size. Many maps are broken up
into quadrants, which are square and are called quad sheets. When a group
of quad sheets is inserted into a drawing, the drawing is considered to be tiled.
into quadrants, which are square and are called quad sheets. When a group
of quad sheets is inserted into a drawing, the drawing is considered to be tiled.
QuickBird TIFF A multispectral image format produced by DigitalGlobe from
its QuickBird satellite.
its QuickBird satellite.
raster data A series of dots, or pixels that form an image. This type of data is
produced when you scan a paper drawing, a blueprint, or a photograph. A
raster image is composed of pixels.
produced when you scan a paper drawing, a blueprint, or a photograph. A
raster image is composed of pixels.
raster entity A series of contiguous pixels that form a single entity such as a
line, rectangle, or circle. ProdNameShort can recognize such entities and create
vector entities or regions that can be more easily edited than the raster
originals.
line, rectangle, or circle. ProdNameShort can recognize such entities and create
vector entities or regions that can be more easily edited than the raster
originals.
raster entity manipulation (REM) An object-oriented method of editing
raster entities in bitonal, color, and grayscale images. REM handles raster
entities much like vector objects. There are three types of REM objects: region
objects, enhanced bitonal region objects, and primitive objects.
raster entities in bitonal, color, and grayscale images. REM handles raster
entities much like vector objects. There are three types of REM objects: region
objects, enhanced bitonal region objects, and primitive objects.
394 | Glossary