Canon CanoScan N1240U User Manual page 102

Glossary
Contents
Troubleshooting
Glossary
Index
TWAIN
TWAIN refers to an industry standard for transferring information from
devices (such as a scanner or digital camera) to your computer. One
interpretation of the acronym is "Technology Without An Interesting
Name."
Underexposed
A dark photographic image that was exposed to too little light when it was
photographed.
Unsharp Mask
Sharpens an image, like a photograph that is slightly out of focus, by
emphasizing the contrast to make outlines more clear.
USB
An abbreviation of Universal Serial Bus, an interface for external devices
connected to a computer and easilly used simply by plugging and
unplugging the USB cable while the computer is switched on.
White-point
The lightest portion of the image scanned as Color or Grayscale. When you
click on the image with the White-point eyedropper, all tones lighter than
the selected sample tone are adjusted to white.
Width
The Width text box contains the width of the current selection or, if there is
no selection, the maximum horizontal output size, based on the currently
selected paper size.
Width-Height ratio
Proportion of the image. To keep the width-height ratio intact, click the
Keep Proportions button before changing the width or height values.
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