Apple Aperture 2 - Manual (Page 648)

648 Glossary
compare image In Aperture, an image set to remain onscreen while other images are
viewed against it. The compare image is indicated by a green border. See also
image .
complementary metal oxide semiconductor (CMOS) A type of digital image sensor
that is capable of recording the entire image provided by the light-sensitive elements
in parallel (essentially all at once), resulting in a higher rate of data transfer to the
storage device. Tiny colored microlenses are fitted on each light-sensitive element in a
CMOS sensor to increase its ability to interpret light. See also
charge-coupled device
(CCD) , digital image sensor .
compositing A process in which two or more digital images are combined into one.
See also
effects .
composition The arrangement of visual elements in a scene.
compression The process by which digital image files are reduced in size. Lossy
compression is the process of reducing digital image file sizes through the removal of
redundant or less important image data. Lossless compression reduces file sizes by
mathematically consolidating redundant image data without discarding it. See also
decompression , LZW compression .
cones A type of receptor in the eye capable of perceiving color. There are three types
of cone cells, each sensitive to a particular frequency range in the visible spectrum.
Cone cells are capable of seeing either red, green, or blue colors. See also
rods .
contact sheet Based on a print preset in Aperture, a printed selection of thumbnail-sized
images with or without associated metadata. Contact sheets in Aperture are similar in
appearance to contact prints made by exposing negatives or transparencies against
photographic paper.
contrast The difference between the brightness and color values in an image that
allows the viewer to distinguish between objects in an image. High-contrast images
have a large range of values, from the darkest shadow to the lightest highlight.
Low-contrast images have a more narrow range of values, resulting in a “flatter” look.
See also
Contrast parameter , density , flat .
Contrast parameter An Enhance adjustment parameter in Aperture used to adjust the
contrast in an image. See also
adjustment , contrast , Exposure adjustment .
control bar The control bar contains buttons and controls you can use to rotate,
rate, and navigate through images, as well as apply keywords to them. See also
keywords , rating .
copyright The legal right to exclusive publication, production, sale, or distribution of a
literary, musical, or artistic work. Typically, these rights are in effect for a specific period
of time.