Contex SD One+ - Page 65

Service Guide SD One+ 65
TWAIN:
A standard method of communications that programs can use to send instructions to hardware (such as scanners)
and receive data back from them (such as pictures).
UCR:
Under Color Removal. A color separation setting used on color photographs where cyan, magenta and yellow inks
are removed from dark, neutral areas and substituted by black ink. The advantages are a reduction in overall ink
usage. See also GCR.
Vector Drawing:
Also called Vector File. Consists of mathematically defined elements, such as “Line from A to B”, “Circle with centre
and radius”, etc. CAD systems use vector drawings because of their accuracy, relatively low memory requirement
and data-file sizes compared to raster images.
Vector File:
Also called Vector Drawing. Consists of mathematically defined elements such as: Line from A to B, Circle with centre
and radius etc. CAD systems use vector drawings because of their accuracy and relatively low memory and data file
sizes compared to raster images.
Vectorization:
Also called raster-to-vector conversion (RTV). The process of automatically converting a raster (bit-mapped) image
into a vector (CAD) drawing.
White Level:
White Level is a setting in scan programs used if one has an original with a background that is not completely white.
To get the background to appear as pure white one can set the White Level to a lower value.
White Point Adjustment
An adjustment made that will determine the amount of highlight detail in an image. The white point should be set so
that the lightest part of an image will only just have zero detail.
XYZ
The CIE system is based on the description of color as a brightness (luminance) component Y (as described above),
and two additional components X and Z. The spectral weighting curves of X and Z have been standardized by the
CIE, based on statistics from experiments involving human observers. XYZ tri-stimulus values can describe any color.
Zoom:
The ability to enlarge or shrink the view of the picture in a window. Zoom does not alter the size of the final scanned
picture; it only provides a better view while creating a selection border on the screen.