25-02-2013, 04:26 PM
MC1704 Computer Graphics and Multimedia System 2 Marks Questions
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1. What is scan conversion?
A major task of the display processor is digitizing a picture definition
given in an application program into a set of pixel-intensity values for storage in
the frame buffer. This digitization process is called scan conversion.
2. Write the properties of video display devices?
Properties of video display devices are persistence, resolution, and aspect
ratio.
3. What is rasterization?
The process of determining the appropriate pixels for representing picture
or graphics object is known as rasterization.
4. Define Computer graphics.
Computer graphics remains one of the most existing and rapidly growing
computer fields. Computer graphics may be defined as a pictorial representation
or graphical representation of objects in a computer.
5. Name any four input devices.
Four input devices are keyboard, mouse, image scanners, and trackball.
6. Write the two techniques for producing color displays with a CRT?
Beam penetration method, shadow mask method
7. What is vertical retrace of the electron beam?
In raster scan display, at the end of one frame, the electron beam returns to the
left top corner of the screen to start the next frame, is called vertical retrace of the
electron beam.
8. Short notes on video controller?
Video controller is used to control the operation of the display device. A fixed
area of the system is reserved for the frame buffer, and the video controller is
given direct access to the frame buffer memory.
9. What is bitmap?
Some system has only one bit per pixel; the frame buffer is often referred to as
bitmap.
10. Differentiate plasma panel display and thin film electro luminescent display?
In plasma panel display, the region between two glass plates is filled with
neon gas. In thin film electro luminescent display, the region between two glasses
plates are filled with phosphor, such as zinc sulphide doped with manganese.