Canon scanner CanoScan FB 630UI User Manual

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Glossary
Black-point
The darkest portion of an image scanned as Color or Grayscale.
When you click on the image with the Black-point eyedropper, all
tones darker than the selected sample tone are adjusted to black.
See also Mid-point, White-point.
Brightness
The overall amount of lightness or darkness in an image. An
image with maximum brightness tends toward white; an image
with minimum brightness tends toward black. While contrast
refers to the range and number of...

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Canon ImageTrust
CanonÕs process of converting grayscale image (8 bits per pixel) to
a black and white image (1 bit per pixel) to yield a more effective
scan for optical character recognition (OCR) applications.
Channel
See Color Channels.
Clear button
The button that removes the current image from the Preview
Area.
CMY
An acronym for cyan, magenta, and yellow, the color
complements to red, green, and blue.
CMYK
An acronym for cyan, magenta, yellow, and...

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Color Matching
The range of colors your scanner can see may not match the range
of colors your video monitor can produce. Color matching lets
your system display colors so that the color on your monitor and
printer matches the colors scanned. See also Canon ColorGear
Color Matching.
Complementary colors
Red, green, and blue can be thought of as complementary colors
to cyan, magenta, and yellow. These colors cancel each other out
when combined in equal...

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Curve file
A file containing Special Tone Curve settings. (Tone sheet-Special
Tone Curves)
Custom curves
A user-defined Special Tone Curve that may be saved in a file.
(Tone sheet-Special Tone Curves)
Custom Resolutions
The Custom Resolutions dialog box lets you create a scan
resolution not found in the preset list, but supported by the input
device.
Default
The preset factory settings on hardware or software.
Digitizing
The process of converting an image...

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End points
The points at each end of a preset or custom tone curve. The curve
end points cannot be deleted. If they are dragged to or past an
edge, they remain on the edge. Add points to the curve by clicking
anywhere in the curve box. (Tone sheet - Special Tone Curves)
Exective
A U.S. standard paper size measuring width x height:7.25 x 10.5 in.
(184.2 x 266.7 mm)
Eyedropper
A Histogram tool used to sample the Black-point, Mid-point, and
White-point areas in...

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Grayscale
Grayscale refers to a single-channel image made up of 256 shades
of gray, ranging from white to black, that represent all tones in an
image.
Height
The Height text box contains the height of the current selection,
or, if there is no selection, the maximum vertical output size,
based on the currently selected Paper Size.
Histogram Tool
The Histogram displays the distribution of bright and dark pixels
for each color channel in the previewed image. The...

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Low contrast
An image that has low contrast does not have many distinct
differences between tones.
Mid-point
The midtone portion of the image scanned as Color or Grayscale.
When you click on the image with the Mid-point eyedropper, all
tones between the black-point and the white-point are adjusted
in relation to the mid-point setting.
Mid-tone
Mid-tones are the middle range of tones in an image, between
highlights and shadows. Midtones can be adjusted for...

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OCR (Optical Character Recognition)
OCR (Optical Character Recognition) software converts text images
into actual text characters readable by a word-processing program
or similar application. The Text Enhanced scan setting sharpens
black and white contrast to assist in the accurate recognition of
characters in OCR software.
Optical resolution
A scannerÕs resolution capability. See also dpi, Resolution.
Output Dimensions
The final dimensions of the scanned...

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Pixel
An acronym for Òpicture element,Ó a pixel is the smallest element
used to create a screen image. It can contain up to 24 bits of color
information.
Platen
The scannerÕs document glass, where originals are placed for
scanning.
Preset Curves
A set of curves designed to fix common photographic image
problems such as underexposure, overexposure, or low contrast.
Preview Area
The area located to the left of the ScanGear CS main window
where the image is...

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Resolution
The degree of detail, translated into the number of pixels or dpi,
which a device such as a scanner, video monitor, printer, or other
image-displaying device, can display or reproduce. See also dpi,
Pixel, Scan Resolution.
RGB
RGB is an acronym for red, green, and blue, the onscreen color
complements to print colors cyan, magenta, and yellow.
Rotate Left
The Rotate Left tool rotates the preview display 90 degrees
counterclockwise. If the Preview...