Apple Aperture 2 - Manual (Page 646)

646 Glossary
capture a. The process of taking the image received by the digital image sensor and
camera processor and storing that information on the memory card in the camera.
b. The process of recording an image in Aperture at the moment it is shot via a
tethered camera. See also
camera , digital image sensor , memory card , tethered
shooting .
center-weighted metering A type of metering that measures the light in the entire
viewfinder but gives extra emphasis to the center of the frame. Center-weighted
metering is the most common type of metering in consumer cameras. See also
evaluative metering , light meter , spot metering .
charge-coupled device (CCD) A type of digital image sensor that records the pixel
information row by row. See also
complementary metal oxide semiconductor (CMOS) ,
digital image sensor .
chromatic spread The extent of colors affected by the hue, saturation, and luminance
parameters in the Color adjustment. See also
adjustment , Color adjustment .
Clone brush A type of Retouch brush in Aperture used to correct and obscure
imperfections in an image by copying pixels from a similar-looking area of an image
and pasting them over the area with the pixels you want to replace. See also
Repair
brush , retouching , Retouch tool .
close-up An image in which the subject usually appears within 3 feet of the camera.
For example, head shots are often referred to as close-ups. A shot of an ant on a
flower’s petal, where the ant fills a majority of the frame, is also a close-up.
CMYK A working space used for print pieces combining cyan, magenta, and yellow
inks in different combinations to create a color that reflects the proper color of light.
Black ink (K) is added to the image last to generate pure black on the page. See also
subtractive color , working space .
Color adjustment An adjustment in Aperture used to adjust hue, saturation, and
luminance on a color-by-color basis, as well as chromatic range. See also
adjustment ,
chromatic spread , hue , luminance , saturation .
color cast An unnatural tint in an image due to a lack of color balance. Color casts
are often caused by artificial light sources such as interior lighting. Color casts in
images are commonly removed by adjusting levels, tint, or white balance. See also
White Balance adjustment .
color channels The individual channels into which color information for digital images
is divided. Each individual color channel represents one of the three individual primary
colors that combine to represent the final image. Each channel has a bit depth; most
digital image files have 8 bits per channel, meaning that there are 256 levels of color
for each channel. See also
bit depth , color depth .