Operation Manual

referenced images Images whose masters are stored outside of the Aperture library. See
also library, managed images, offline, online.
Reject rating In Aperture, a negative rating applied to an image as part of the photo
editing process. See also photo edit, rating, Select rating.
relative colorimetric A rendering intent suitable for printing photographic images. It
compares the highlight values of the source color space to that of the destination color
space and shifts out-of-gamut colors to the closest reproducible color in the destination
color space. This render intent can cause two colors, which appear different in the source
color space, to be the same in the target color space, also known as clipping. See also
gamut, perceptual, rendering intent.
rendering intent The method by which colors that are out of gamut for a selected output
device are mapped to that device’s reproducible gamut. See also gamut, perceptual,
relative colorimetric.
Repair 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. In addition to overwriting
the pixels, the Repair brush resamples the pasted pixels to match the color, texture, and
luminance of the pixels you replaced. See also Clone brush, retouching, Retouch
adjustment.
resolution The amount of information a digital image is capable of conveying. Resolution
is determined by the combination of file size (number of pixels), bit depth (pixel depth),
and dots per inch (dpi). See also bit depth, dots per inch (dpi), pixel.
Retouch adjustment In Aperture, an adjustment used to correct or obscure imperfections
in an image. Used in conjunction with the Retouch HUD, which provides a Clone brush
and a Repair brush. See also adjustment, Clone brush, Repair brush.
retouching The process of altering an image to add or remove details. See also Clone
brush, compositing, effects, filters, Repair brush, Retouch adjustment.
RGB Short for Red, Green, Blue. A color space commonly used on computers, in which
each color is described by the strength of its red, green, and blue components. This color
space directly translates to the red, green, and blue elements used in computer displays.
The RGB color space has a very large gamut, meaning it can reproduce a wide range of
colors. This range is typically larger than the range that printers can reproduce. See also
additive color.
rods A type of receptor in the eye capable of perceiving luminance. Rods do not perceive
color, but only levels of brightness. See also cones.
900 Glossary