Summarizes the basic concepts of computer graphics

Refresh type CRT: rapid control of the electron beam is repeatedly redrawn to maintain the image brightness of the phosphor in the art.

Refresh rate: CRT screen on the repetition frequency is called the refresh rate of the paint, as may be appreciated that the display can display pixel number.

Resolution: CRT display without overlapping points up law called resolution.

Inches: 1 inch equals 2.54 cm.

Raster scanning system of: electron beam swept across the screen, one line, sequentially from the top to low, referred to as a scan line for each row, when the electron beam moves along each row, changing the intensity of the electron beam, so as to establish a composition highlights pattern. Rasterization scanning system has a storage capacity for each point on the screen intensity,

Pixel: Each electron beam may be illuminated screen dots are called pixels.

Color Buffer: pattern definition is stored in a storage area called the refresh buffer or frame buffer, since the refresh buffer for storing color values ​​of the screen, thus also referred to as color buffer.

Frame buffer: In addition to color, other information is also stored in the pixel buffer, and therefore something different buffer areas referred to as "frame buffer."

A video display aspect ratio: number of columns of pixels divided by the system can display the number of rows. The aspect ratio may also be used on a ratio of the number of screen pixels in the horizontal and vertical directions is the same as the desired length of the segment.

Depth buffer: each pixel on the screen is called a frame buffer depth buffer bits.

Bitmap: per pixel frame buffer is called a bitmap.

FIG pixels: number of pixels per frame is called a pixel buffer in FIG.

The reason the image gap adjacent screen: 24 frames per second or less, we feel there is a gap between the adjacent image.

Electron beam penetration method: A method for displaying a color image is coated with multiple layers of different phosphors on the screen, it determines the color depth of the electron beam emitted from the fluorescent layer penetrated. But only display two colors red and green and red and green color in the middle of the transition.

Shadow masking: the grating system used, because the range of colors it can produce much more than the penetration method, this method is based on the familiar red, green, and blue combination principle, known as the RGB color model.

Element: graphics package used to describe a function of the various graphical elements.

Geometry: geometric primitive objects described output element.

Bounding box: minimum / maximum, the region forming the object coordinate (local coordinate system) of the x, y, z, called bounding box.

Enclosing rectangle: for two-dimensional graphics, x, y is the minimum, maximum, area formed referred enclosing rectangle.

  

   

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