What is raster scan processor?

The raster scan system is a combination of some processing units. It consists of the control processing unit (CPU) and a particular processor called a display controller. Display Controller controls the operation of the display device. It is also called a video controller.

What is the display processor?

Display Processor is the interpreter or a hardware that converts display processor code into picture. The Display Processor converts the digital information from CPU to analog values. The main purpose of the Digital Processor is to free the CPU from most of the graphic chores.

How does raster scanning work?

In a raster scan system, the electron beam is swept across the screen, one row at a time from top to bottom. As the electron beam moves across each row, the beam intensity is turned on and off to create a pattern of illuminated spots. This memory area holds the set of intensity values for all the screen points.

Why raster scan systems have a special purpose processor called video display controller?

1 Raster-scan system In addition to the central processing unit a special purpose processor called the video controller or display controller is used to control the operation of the display device. Graphics commands in the program are translated by the graphics package into a display file stored in the system memory.

What do you mean by raster scan random scan?

Raster scan and random scan are the mechanisms used in displays for rendering the picture of an object on the screen of the monitor .

What are the characteristics of raster scan system?

Raster Scan Displays are most common type of graphics monitor which employs CRT. It is based on television technology. In raster scan system electron beam sweeps across the screen, from top to bottom covering one row at a time.A pattern of illuminated pattern of spots is created by turning beam intensity on and off as it moves across each row.

What is raster scanning process?

A raster scan is a method of constructing an image through the use of horizontal lines. The lines can be analog representations of the image, or they can be a sequence of pixels in which each dot represents a tiny rectangular area of the image.

What is raster scan display in computer graphics?

Raster-scan display sample. A raster scan, or raster scanning, is the rectangular pattern of image capture and reconstruction in television. By analogy, the term is used for raster graphics, the pattern of image storage and transmission used in most computer bitmap image systems.