Calibration - A process of setting digital imaging components to standardized settings that will produce accurate and predictable results in the output.

Unsharp Masking (USM) - The sharpening of an image by creating contrast at contrasting edges of the element.

Focal length - The distance, usually measured in millimeters, between the lens and the focal plane in a camera. As the focal length increases, the field of view decreases.

Digital Printer - Any printing device that is capable of translating digital data into hardcopy output.

Aperture - This is the opening in the lens that controls how much light goes through to the film. Apertures are marked in f/stops. The smaller the number, the larger the aperture.

BPS (Bits Per Second) - A measurement of the speed of data transfer, used interchangeably with the term baud per second. In many image editing programs, this is the term describing a special effects filter that performs a specific function, such smoothing selective edges. In some cases, the image editing programs present the brushes as an icon that actually looks like a brush.

HDTV (High-Definition Television) - A television system that incorporates 1000 or more horizontal lines of resolution (twice current standards) along with a wider aspect ratio and digital quality audio.

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