Glossary
page 46
LaCie photon20visionII
User’s Manual
Midtones -
The parts of an image between the lighter and darker areas, at around 50% gray.
Moiré -
An undesirable pattern in color printing that results from incorrect screen angles of overprinting halftones. Moires
usually result when you scan a halftone or when you scan images taken directly from a magazine (instead of scanning a
photographic original or a transparency).
Pixel -
A picture element, or a single unit of a graphic image used by the computer to represent image information in a
digital format. An image file, for instance, is simply a representation of hundreds (or thousands) of pixels arranged closely
together in a grid so that they appear to form a picture.
Refresh rate -
The number of times that the image on the monitor display is drawn each second. If the monitor has a refresh
rate of 75 Hz, all the pixels from top to bottom are cycled at 75 times a second. Refresh rates are important because they
control flicker, and higher refresh rates are better to eliminate eye strain and headaches that result from low refresh rates and
flickering.
Resolution –
The number of pixels that are contained on a monitor display, referenced by the number of pixels on the vertical
and horizontal axes.
Reflective media -
Media capable of reflecting light; e.g., photographs, magazine prints.
RGB (Red, Green, Blue) -
A color model in which every color is composed of a varying amount of the colors red, green, and
blue.
Saturation -
The intensity of a color, or the degree of color in a particular hue. For example, the green leaves in a tree will
appear "more green" if the color is saturated.
Shadows -
The darkest areas of an image.