Apple Aperture 3.5 - Manual (Page 508)

Glossary 508
digital A description of data that is stored or transmitted as a sequence of ones and zeros. Most
commonly, refers to binary data represented using electronic or electromagnetic signals. JPEG,
PNG, RAW, and TIFF files are all digital. See also digitization.
digital image sensor The computer chip located at the image plane inside the camera that
consists of millions of individual light-sensitive elements capable of capturing light. See
also camera, charge-coupled device (CCD), complementary metal oxide semiconductor (CMOS),
megapixel.
digital noise Misinterpreted pixels occurring as the result of high ISO settings; also known as
chrominance signal-to-noise ratio. Random bright pixels, especially in solid colors, are the result of
digital noise. See also ISO speed, noise reduction.
digital original file See original.
digital point-and-shoot camera A lightweight digital camera with a built-in autofocus feature,
aptly named for the two steps required of the photographer to shoot a photo. The lens, aperture,
and shutter are one assembly that is usually irremovable from the camera. See also camera,
digital single-lens reflex (DSLR) camera.
digital single-lens reflex (DSLR) camera An interchangeable-lens camera where the image
created by the lens is transmitted via a reflexing mirror through a prism to the viewfinder, and
the viewfinder image corresponds to the actual image area. The mirror reflexes, or moves up, so
as not to block the digital image sensor when the shutter is open. See also camera, digital point-
and-shoot camera.
digitization The process of converting an analog voltage value to a digital value.
digitize A term often used by photographers for converting photos captured on film to a digital
format, such as TIFF, using a film scanner.
disclosure triangle A small triangle you click to show or hide details in the Aperture interface.
display The computer’s monitor.
distort Performing an adjustment that changes the shape or composition of an image. See
also effects.
DNG A royalty-free RAW image format designed by Adobe Systems Incorporated. See also
format, RAW.
Dodge Quick Brush A type of Quick Brush adjustment that lightens the area of the image the
adjustment is brushed on. See also adjustment, Brush HUD, Burn Quick Brush, Quick Brushes.
dot gain A printing term used to describe the enlargement of halftone dots as ink is absorbed
into paper. Dot gain can affect the quality of an image’s appearance by reducing the amount of
white reflected off the paper.
dots per inch (dpi) A printer resolution measurement that refers to the maximum number of
dots within a square inch. See also print, resolution.
drift Changes in the way a device reproduces color over time. For example, the age of
inks and the type of paper can cause a printer’s color output to drift. See also device
characterization, gamut.
drop shadow An effect that creates an artificial shadow behind an image. Typically used on
websites and in photo albums to create the illusion of three dimensions.
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