ATI Technologies FIRE GL1 User's Guide download pdf (Page 54)

RAM

Random Access Memory - memory that can be read from and written to.

Rasterization

Rendering 3D images to a 2D screen is called rasterization. Real-time 3D graphics

cards take 3D coordinates from the CPU for a given frame of animation and render

them to the screen, calculating perspective, viewpoint, and visibility of objects as well

as rendering surfaces and textures on to surfaces.

RealColor

Normally designates a 15 bits per pixel or 16-bpp graphics mode, i.e. 32,768 or

65,536 colors.

Refresh rate

Vertical refresh rate in Hz indicates how many full images per second are displayed

on the monitor. The higher the refresh rate, the less the display will flicker.

Rendering

Process of displaying an object with shading effects to yield a more natural three-

dimensional appearance.

Resolution

Number of pixels displayed in horizontal and vertical direction on the monitor. The

higher the resolution, the crisper and sharper the images appear.

RGB8 Color

RGB8 color file types are 3 bit types in which each pixel can have one of 8 colors.

The RGB8 color images are automatically transformed into indexed 16 color images

whereby the 8 colors are retained but space for further 8 colors is created. It is not

possible to transform an existing file into an RGB8 color file type.

RGB Color Model

Monitors use additive mixing of the three basic colors red, green and blue to create

images on the screen with an infinite number of colors. Image data is therefore

processed via data for RGB color combinations. The combinations of the three basic

colors create a color model whose origin is the color black and the opposite value is

the color white.

RGB True Color

RGB stands for red - green - blue. All the colors that are used in this file are created

additively mixing parts of the three basic colors. The parts of the three basic colors

can be varied in 256 steps. If you mix all these colors together a total of 16.7 million

possible color combinations is attainable (3x8 bits = 24 bits, 2 to the power of 24 =

16.7 million). As the human eye can not tell the differences between color hues from

about this level, such an image is termed 'True Color', i.e. 'as in real life'.

ROM

Read Only Memory; memory space in your computer for storing permanent

operating instructions. It cannot be written to.

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ATI Technologies FIRE GL1 User's Guide Page 54