Quantization, Ra-4, Red-eye – Apple Aperture User Manual
Page 447: Rating, Reject
Glossary
447
quantization The process of converting a value derived from an analog source into a
discrete digital value. See also
QuickTime A cross-platform multimedia technology developed by Apple. Widely used
for editing, compositing, web video, and more.
RA-4 A type of professional printer capable of printing digital files on traditional
photographic paper. RA-4 printers use a series of colored lights to expose the paper;
the colors blend together to produce continuous-tone prints. See also
.
RAID Short for Redundant Array of Independent Disks. A method of providing
photographers who have large image libraries many gigabytes of high-performance
data storage by formatting a group of hard disks to act as a single drive volume. The
performance of a group of hard disks striped together as a RAID can be much higher
than that of the individual drives.
RAM Short for random-access memory. A computer’s memory capacity, measured in
megabytes (MB) or gigabytes (GB), which determines the amount of data the computer
can process and temporarily store at any moment.
rangefinder An apparatus found on many cameras used to help focus the image. See
also
.
raster image processor (RIP) A specialized printer driver that replaces the driver that
comes with your printer. It takes input from applications and converts, or rasterizes, the
information into data that the printer understands so that it can put dots on a page.
Software RIPs typically offer features not found in standard printer drivers.
rating In Aperture, the process of adding a value to an image to indicate its quality in
relation to other images in a selection. See also
.
RAW The original bit-for-bit digital image file captured by the camera.
reciprocity The relationship between the aperture and the shutter that allows for
correct exposures as a result of multiple shutter speed and aperture setting
combinations. An increase in aperture and decrease in shutter speed creates the same
exposure as the previous aperture and shutter combination, and vice versa. See also
.
red-eye The phenomenon that gives people glowing red eyes in photographs. Red-
eye is caused by the close proximity of the flash to the lens (especially built-in flash). In
Aperture, Red Eye is an adjustment that replaces red pixels with black, eliminating the
red-eye effect. See also
Reject In Aperture, a negative rating applied to an image as part of the photo editing
process. See also