Operation Manual

densitometer An instrument designed to measure the optical density of photographs.
See also device characterization.
density The ability of an image to reproduce distinct dark colors. An image with high
definition in the darker colors is referred to as dense. See also contrast, flat.
depth of field The area of the image that appears in focus from the foreground to the
background. Depth of field is determined by a combination of the opening of the aperture
and the focal length of the lens. See also aperture, background, focal length, foreground.
desaturate To remove color from an image. Complete desaturation results in a grayscale
image. See also Black & White adjustment, grayscale, saturation.
Desktop setting A secondary Viewer setting that turns off the dual-display function. See
also display, secondary Viewer.
destination profile The working-space profile that defines the results of a color conversion
from a source profile. See also profile.
Detect Edges A Brush HUD setting in Aperture that examines differences in pixel values
to determine possible hard edges and then restricts the brush from affecting pixels beyond
those edges, making it easier to paint adjustments into specific areas of the photo. See
also Brush HUD.
device characterization The process of creating a unique, custom profile for a device
such as a display or printer. Characterizing a device involves specialized dedicated
hardware and software to determine the exact gamut of the device. See also calibration,
gamut.
device dependent Describes color values that are contingent upon the ability of a device
to reproduce those colors. For example, some colors produced by displays cannot be
reproduced on paper by a printer. The colors produced by the display are outside the
gamut of the printer. Therefore, those colors are considered to be device dependent. See
also gamut.
device independent Describes standard color spaces, such as CIE Lab and XYZ, where
the interpretation of a color is not dependent on a specific device. See also color space,
Commission Internationale de l’Eclairage (CIE).
Devignette adjustment An adjustment in Aperture used to correct unwanted vignetting
applied to the image at the time it was captured. See also Vignette adjustment, vignetting.
diffused lighting A type of light that is scattered across the subject or scene. Diffused
lighting results in an image with low contrast and detail, as seen in images captured
outdoors on an overcast day. See also contrast, flat.
883Glossary