Canon N650U - Manual (Page 59)

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Glossary
Auto Tone Correction
A function that uses brightness/contrast and gamma value settings to
automatically analyze and adjust images.
Bits/Bit Numbers
Each dot of a 1-bit image is assigned either black or white according to the
threshold brightness value, resulting in the image being reproduced in just
those two colors. Each dot of an 8-bit grayscale image can be assigned any one
of 256 tones of gray, ranging from pure white to black. Each dot of a 24-bit
color image can be assigned any one of 16.7 million colors since each of its
color channels (red, green and blue) can be expressed in 256 distinct color tones
(8 bits).
Black and White
An image mode used to reproduce images in two tones only: black and white.
The brightness level at which a dot is determined to be either black or white is
called the threshold value, which can be adjusted. See Threshold Value.
Black Eyedropper Tool
Tool used to the select the darkest portion of an image in the preview area.
Used with the Histogram function to adjust image brightness. When this tool is
clicked on the image, all areas that are darker are set to pure black.
Brightness
The intensity of light in a scanned image. Raising an image’s brightness
increases its overall brilliance, while decreasing it makes it darker.
Calibration
A scanner function that automatically adjusts the scanner’s white balance to
true white.
Color Balance
The function in that enables you to adjust the blend of colors in a color image.
You can adjust the color balance by altering the blend of the red, green and
blue color set or the cyan, magenta, yellow and black color set.