Apple Aperture 2 Uživatelský manuál stáhnout pdf (Strana 646)

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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.

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