Glossary | 555
PNG (Portable Network Graphics)
A graphic file format designed for use in online viewing. This format can import 24-bit color graphics.
pressure-sensitive pen
A stylus that you can use to access commands and draw your images. To use with Corel PHOTO-PAINT, you must install the pressure-sensitive
pen, along with a pressure-sensitive tablet and its corresponding drivers.
process color
In commercial printing, colors that are produced from a blend of cyan, magenta, yellow, and black. This is different from a spot color, which
is a solid ink color printed individually (one printing plate is required for each spot color).
progressive
In JPEG images, a method of having the image appear on screen in its entirety, at a low, blocky resolution. As the image data loads, the
image quality progressively improves.
protected area
An area that prevents paint and effects from being applied to the underlying pixels.
See also mask and editable area.
R
radius
As applied to orbits, sets the distance between the center of the brushstroke and the nibs that travel around the center of the brushstroke
when you paint with orbits. Increasing this value increases the size of the brushstroke.
As applied to the Dust & Scratch filter, sets the number of pixels surrounding the damaged area that are used to apply the filter.
range sensitivity
A paletted color mode option that lets you specify a focus color for the paletted conversion. You can adjust the color and specify its
importance to guide converting.
rasterized image
An image that has been rendered into pixels. When you convert vector graphic files to bitmap files, you create rasterized images.
render
To capture a two-dimensional image from a three-dimensional model.
resample
To change the resolution and dimensions of a bitmap. Upsampling increases the size of the image; downsampling decreases the size of
the image. Resampling with fixed resolution lets you maintain the resolution of the image by adding or subtracting pixels while varying the
image size. Resampling with variable resolution keeps the number of pixels unchanged while changing the image size, resulting in lower or
higher resolution than that of the original image.
resolution
The amount of detail that an image file contains, or that an input, output, or display device is capable of producing. Resolution is measured
in dpi (dots per inch) or ppi (pixels per inch). Low resolutions can result in a grainy appearance; high resolutions can produce higher quality
images but result in larger file sizes.
RGB
A color mode in which the three colors of light (red, green, and blue) are combined in varying intensities to produce all other colors. A value
between 0 and 255 is assigned to each channel of red, green, and blue. Monitors, scanners, and the human eye use RGB to produce or
detect color.
rollover
An interactive object or group of objects that changes its appearance when you click or point to it.
