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Image Enhancement How To….


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.