A P P E N D I C E S
Glossary
12-bit grayscale image
An image which can display 4,096 gradations over the range of white, gray, and black. However, there is no difference in appearance between a
24-bit color image
An image which can display 256 gradations (8 bits x 3) for each RGB color for a total of 16.7 million colors (256 x 256 x 256).
An image which can display 4,096 gradations (12 bits x 3) for each RGB color for a total of 67.8 billion colors (4096 x 4096 x 4096).
An image which can display 256 gradations over the range of white, gray, and black.
Dot
The fundamental element of a letter, object or image. The number of dots per inch (dpi) determines the resolution (or density) of a letter, object or image.
Gamma Correction
The process whereby variations in color tones from the output of monitors, printers and other output devices are made consistent with the source (input) document. With
Image File
A computer file generated by scanning an image or by creating an image with an image editing software program, such as Photoshop. An image file is generally comprised of bitmap data, a collection of color information corresponding to each dot of an image. There are many formats for image files, including the TIFF, PICT and BMP formats.
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