Apple Aperture 3.5 - Manual (Page 504)

Glossary 504
candid shot Refers to a photograph of a person that appears to have been taken informally and
unposed, without the subject’s knowledge. See also composition.
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 a photo in Aperture at the moment it is shot via a tethered camera. See also camera,
digital image sensor, image, 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 Aberration adjustment An adjustment in Aperture that corrects chromatic
aberration, produced by certain lenses when the photo was shot. Some lenses refract light at
specific focal lengths, resulting in a rainbow effect in the image. See also adjustment, image, light.
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 image, pixel, Repair brush, Retouch
adjustment, retouching.
close-up A photo 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 photo last to generate pure black on the page. See also subtractive color,
working space.
codec Short for compressor/decompressor or encode/decode. A software component used to
translate video or audio from its analog uncompressed form to the digital compressed form in
which it is stored on a computer’s hard disk. Also referred to as a compressor. See also audio file,
video file.
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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