558 | Corel PHOTO-PAINT X8 User Guide
tint
In photo editing, a tint often refers to a semitransparent color applied over an image. Also called a color cast.
In printing, a tint refers to a lighter shade of a color created with halftone screening — for example, a spot color.
See also halftone.
tonal range
The distribution of pixels in a bitmap image from dark (a value of zero, indicating no brightness) to light (a value of 255, indicating full
brightness). Pixels in the first third of the range are considered shadows, pixels in the middle third of the range are considered midtones,
and pixels in the last third of the range are considered highlights. Ideally, the pixels in an image should be distributed across the entire tonal
range. A histogram is an excellent tool for viewing and evaluating the tonal range of images.
tone
The variations in a color or the range of grays between black and white.
transparency
The quality of an object that makes it easy to see through. Setting lower levels of transparency causes higher levels of opacity and less
visibility of the underlying items or image.
See also opacity.
true color
A term that refers to digital RGB color that is composed of 24 bits, or 16.7 million colors.
TWAIN
By using the TWAIN driver supplied by the manufacturer of the imaging hardware, Corel graphics applications can acquire images directly
from a digital camera or scanner.
U
uniform fill
A type of fill used to apply one solid color to your image.
See also fill.
Unicode
A character encoding standard that defines character sets for all written languages in the world by using a 16-bit code set and more than
65, 000 characters. Unicode lets you handle text effectively regardless of the language of the text, your operating system, or the application
you are using.
URL (Uniform Resource Locator)
A unique address that defines where a webpage is located on the Internet.
V
vector graphic
An image generated from mathematical descriptions that determine the position, length, and direction in which lines are drawn. Vector
graphics are created as collections of lines rather than as patterns of individual dots or pixels.
See also bitmap.
W
watermark
A small amount of random noise added to the luminance component of the image pixels which carries information about the image. This
information survives normal editing, printing, and scanning.
white point
The measurement of white on a color monitor that influences how highlights and contrast appear.
