dots per inch (dpi) | the number of dots, or pixels, for each inch of the original that |
| you scanned. See also resolution. |
driver | the program that handles the basic operations of the scanner. |
final scan | The very last scan you make of the original after you have |
| prescanned and adjusted other settings, such as brightness or |
| contrast. |
gamma curve
grayscale image
The line that represents the value of the tones of the original versus the value of the tones of the scanned image. A gamma value of 1 means no adjustment – the scanned image will look the same as the original. If you alter the gamma curve you can affect the middle range of tones without drastically altering the brightest or darkest parts of the image.
One of four possible image types. When you choose grayscale as the image type, your scanner will produce an image containing only shades of gray. Choose grayscale if the original you are scanning is a black and white photo, or if you want the scanned image to look like a black and white photo. See also color image, halftone image, line art image.
halftone image | One of four possible image types. When you choose halftone |
| as the image type, your scanner will mix black and white to give |
| the illusion of tone, just as in a newspaper photo. See also color |
| image, halftone image, line art image. |
highlight | the light areas of an image. |
image type | Refers to the kind of original you are scanning (e.g. text vs. |
| photo) or to the type of image you would like to produce. See |
| color image, grayscale image, halftone image, line art image. |
37
