User guide

Glossary 515
list view A Browser view that displays photos in a list by name, icon, and accompanying
metadata, such as rating, image dimensions, le size, and date, rather than as a row or grid of
thumbnails. See also Browser, lmstrip view, grid view, metadata, rating.
Loupe A tool in Aperture used to magnify the area of the photo you place it over.
luminance A value describing the brightness of all color channels combined in a pixel.
LZW compression A lossless data-compression algorithm developed by Abraham Lempel, Jakob
Ziv, and Terry Welch in 1984. LZW compression algorithms are typically used with JPEG and TIFF
graphics les to reduce the le size for archiving and transmission at a ratio of 2.8:1. See also
compression, JPEG, TIFF.
macro lens A type of lens used for extreme close-up photography. See also camera, lens, prime
lens, telephoto lens, wide-angle lens, zoom lens.
main Viewer For systems with multiple displays, the main Viewer is used for displaying the
Aperture application. See also display, secondary Viewer.
managed images Images whose originals are stored in the Aperture library. The locations of the
originals are managed by the Aperture database. Managed image les are always online. See also
library, oine, online, original, referenced images.
megapixel One million pixels. For example, 1,500,000 pixels equals 1.5 megapixels. See also
digital image sensor, pixel.
memory card The device in the camera where digital image les are stored. See also
camera, capture.
merging libraries The process of importing an Aperture library le and merging its contents
into the library that is currently open in Aperture. See also library.
metadata Data about data; metadata describes how data was collected and formatted.
Databases use metadata to track specic forms of data. Aperture supports both EXIF and IPTC
metadata. See also EXIF, IPTC.
meter The process of using a light meter to calculate the appropriate exposure. See also
light meter.
midtones The color values in an image between the highlights and shadows. See also contrast,
highlights, Highlights & Shadows adjustment, Levels adjustment, shadows.
mirroring The process of showing the same photo on two or more displays. See also extended
desktop mode.
Mirror setting A secondary Viewer setting that sets Aperture to present the same photo
selection on the main and secondary Viewer displays. See also display, mirroring, main Viewer,
photo selection, secondary Viewer.
moire pattern Refers to the type of visual pattern that is created by the interference of two grids
overlaid on top of one another. Moire patterns can occur in photos taken with digital cameras
when the linear pattern in the photo interferes with the linear pattern of the digital image sensor
pixel array. The moire pattern often results from a weak anti-aliasing lter employed by the
camera’s image processor. See also digital image sensor, RAW Fine Tuning adjustment.
monitor See display.
67% resize factor