Operation Manual

Intensify Contrast Quick Brush A type of Quick Brush adjustment that corrects the shadow
areas of the image that appear washed out by intensifying the contrast between pure
black and 50 percent gray in the area of the image the adjustment is brushed on. The
Intensify Contrast Quick Brush adjustment is equivalent to applying an Overlay blend.
See also adjustment, Brush HUD, contrast, Polarize Quick Brush, Quick Brushes, shadows.
International Color Consortium (ICC) An organization established to create the color
management standard known as the ICC profile. ICC profiles are universally accepted by
hardware and software vendors because they’re based on an open standard. See also
ICC profile.
IPTC Short for International Press Telecommunications Council. IPTC metadata is used by
photographers and media organizations to embed keywords (words describing the
characteristics of the image, including the photographer’s name) in the image files
themselves. Large publishers typically use image management systems to quickly identify
images based on the IPTC information embedded in the image. See also EXIF, metadata.
IPTC Core A defined set of metadata fields, primarily used by photographers and news
media, built on Adobe’s XMP technology. See also IPTC, metadata, XMP sidecar file.
iris See pupil.
ISO speed The relative sensitivity of film provided as a benchmark by the International
Standards Organization (ISO). In digital cameras, the minimum ISO rating is defined by
the sensitivity of the digital image sensor. When the ISO setting on the camera is increased,
allowing the photographer to shoot in low-light situations, the camera amplifies the
voltage received from the light-sensitive elements on the digital image sensor prior to
converting the voltage signals to digital values. See also digital image sensor, digital noise.
JPEG Short for Joint Photographic Experts Group, JPEG is a popular image file format that
lets you create highly compressed graphics files. The amount of compression used varies.
Less compression results in a higher-quality image. JPEG files usually have the .jpg
extension. See also format, RAW+JPEG image pair.
kelvin (K) A unit of measurement used to describe color values of light sources, based
on a temperature scale that begins at absolute zero. See also color temperature, White
Balance adjustment.
keywords Descriptive words about the subject in the image that are added to image
versions and saved as metadata. See also control bar, Keywords HUD, metadata.
Keywords HUD A floating window containing a library of keywords that can be applied
to an image selection. See also keywords, metadata.
lab plot A visual three-dimensional representation of the CIE Lab color space. See also
color space, ColorSync.
891Glossary