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Chapter
3
Explanation of
Technical Terms
n Element
Elements refer to data consisting of points (vertices), polygons and color images
*1
.
When data acquired by the VIVID (VI) series digitizer is loaded to this software, it will always be displayed as a
polygon mesh element. In addition, use of the Edit – Dene command allows you to dene a part of an existing ele-
ment as a new element. Names of elements loaded to this software and those that are newly dened are displayed in
the element list located at the right edge of the screen.
*1 Some polygon mesh elements do not have color images.
For instance, a polygon mesh element created by the Edit – Dene command without “Copy image( s)”
selected does not have color images.
n Scene
A scene refers to information such as currently opened element, its view information (zoom setting, viewing direc-
tion, Shades/Lines display mode), camera
*2
, point of interest
*3
and light
*4
. When a scene is saved using the File –
Save – Scene command, all this information will be saved.
*2 The camera indicates direction in which the image displayed in a “Isometric” or “Perspective” element
view window is viewed. (The image displayed in “Isometric” or “Perspective” element view window is the
image of the object viewed from the camera position.)
The camera position can be moved using the View – Camera – Settings or View – Orbit command.
*3 The point of interest shows the direction in which the camera views the image. By moving the point of in-
terest using the View – Camera – Settings command, the viewing direction of the camera can be changed.
*4 The light provides shadow for “Shades” element view windows, and two kinds of light are available: point
light source and environmental light.
With the default settings, the point light source is located behind and to the right of the camera. Position of
the point light can be moved by the View – Move Light command.
In the SHADING display mode, the intensity of the environmental light, color of the light and material of
elements (highlight, object’s color) are determined automatically.
n Camera Data File
A camera data le contains data (i.e. the data before conversion to element data) acquired by the digitizer. It is pos-
sible to set the resolution for the range image, ll holes (i.e., areas where no data exists) with points automatically
and merge more than one data acquired at different angles using the optional turntable.
n Element File
An element le contains data for a single element.
n Scene File
A scene le contains data for a scene.
n Dynamic Range Expansion Function
This function expands the measurement range when the VIVID 9i (VI-9i) or VIVID 910 (VI-910) performs scanning.
The laser beam of three different intensity levels (high, middle, low) is emitted to the object, and the rays reected
from the object are captured by the CCD. Among the reected rays, the data within the CCD’s measurement range
are used to expand the entire measurement range.