User Guide

Glossary
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filter Program that can apply an effect to an image, such as an embossed
appearance or a sepia tone.
fisheye distortion In fisheye distortion, the photo appears to bulge outwards from the
center, as if the photo were wrapped around a sphere.
footer Comment or description added to the bottom of an image. Some-
times called a caption.
frame Single still image in a film or video.
frame rate Speed at which a film or video displays frames. Frame rate is mea-
sured in frames per second (FPS).
gamma Range of color values a monitor, scanner, or printer can display.
Adjusting this value increases or decreases the intensity of the light
spectrum. A gamma corrected image simulates the adjusted display
value when it is saved.
grayscale image Image composed of different shades of gray.
header Comment or description added to the top of an image. Also referred
to as a caption.
highlights Highlights are the brightest or whitest parts of an image.
histogram A histogram is a bar graph that displays the dynamic range of shad-
ows and highlights in an image.
HSL An acronym for hue, saturation, and lightness.
hue Predominant color in an image.
image editor Program that you can use to create and edit images. ACD Photo Edi-
tor is an image editor.
image optimizer Program you can use to make your images more suitable for the
Internet. ACD RealOptimizer is an image optimizer.
image resolution Quality of image details and colors. Also used to describe the qual-
ity of monitors and printer output.
image viewer Program that displays images. ACDSee and ACD Photo Editor are
image viewers.