Glossary

Address: A number that identifies the memory location of a peripheral device.
Brightness: The setting that determines the overall whiteness of the image for scanning
Contrast: A comparison between the lightest and darkest part of an image. Low contrast indicates a very gray image, while high contrast represents highly defined differences between light and dark.
Dithering: Creating dots of different patterns and sizes that fool the eye into seeing various shades of gray.
DPI: Dots Per Inch, a measurement of resolution.
Gray Scale: A range of grays with regular density intervals from white to black. A gray scale image is an image that contains various levels (or shades) of gray.
Halftone: The method of making a black and white image appears to have shades of gray.
Highlight: The brightest area in an original or an image represented in a halftone by the smallest dots or the absence of dots.
Histogram: Graphs the gray scale values distribution of a scanned image.
Image: The bitmapped result of scanning an original.
B/W: An image consisting only of black and white pixels.
Original: The pictorial source in its original form, for example, artwork, a photograph or a transparency.
Pixel: A single dot on a computer monitor or digital image.
Preview Size: A control used to limit the length of previewed image in the scan area. Reducing the length of the preview image saves time.
Preview Window: The view area in the Scanner dialog box, representing the glass plate of the scanner.
Photo/Document Image Type: A scanning mode used to scan non-transparent pictures, graphics and so on.
Resolution: A measure of the fineness of detail that a device can record or produce. The higher the resolution, the finer the detail.
Shadow: The darkest area in an original or an image represented in a halftone by the largest dots.
TIFF: An industry standard image file format supported by many applications.
Transparency Adapter: An adapter installed on a scanner to scan slides, film, and X-rays.
Transparency Scanner Type: A scanning mode used to scan transparency pictures or graphics such as slides, films, and X-ray films.
TWAIN: A protocol developed by leading imaging hardware and software companies to make it easier to integrate input peripherals and applications.

 

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