Raster and random scan display technologies, Computer Graphics

Assignment Help:

Raster and Random Scan Display Technologies

For display or printing graphics objects, various technologies have been invented. Research and development is still on for getting refined and more advanced display technologies for achieving as much realism as possible in graphics display. Early graphics devices were line-oriented. This means the primitive operations were line drawing. For example, a plotter was based on sketching the figure through a pen using line segments approximating the graphics object. For complex objects, thousands of line segments were used to plot the object.

Such devices were called vector displays or random scan displays. In the present time raster graphics is a standard technology commonly used in most of the graphics devices. Raster graphics uses a raster which is a 2-dimensional grid of pixels (picture elements). Each pixel may be addressed and illuminated independently, just as in a graph paper, we are able to address every cell independently. Therefore the primitive operation is to draw a point which means to assign a color to a pixel. Everything else is built upon that. There are a variety of hardcopy and display devices based on raster graphics technology. The inkjet and laser printers are examples of hardcopy devices whereas CRT (cathode ray tube) and LCD (liquid crystal display) are well known examples of display devices based on raster graphics.


Related Discussions:- Raster and random scan display technologies

Buffer areas required for z-buffer algorithm, Buffer Areas Required For Z-B...

Buffer Areas Required For Z-Buffer Algorithm For applying z-buffer algorithm, we need two buffer areas or two 2-Dimentional arrays: 1) Depth-buffer [i,j], to sa

Output primitives and geometric transformations, Output Primitives and Geom...

Output Primitives and Geometric Transformations You learnt how some basic geometric objects such as line segments, circles, ellipses and other curves are processed for plotting

Important points for designing the animation sequence, Important Points for...

Important Points for Designing the Animation Sequence There are several applications which do not follow this sequence as, real time computer animations generated by vehicle dr

Acquire the perspective transformation, Acquire the perspective transformat...

Acquire the perspective transformation onto z = - 2 Plane, where (0, 0, 18) is the center of projection. Solution: Now centre of projection, C (a, b, c) = (0, 0, 18) ∴ (n 1

Dv encoder type 2, DV Encoder Type 2: Encoder Type 2 generates a VfW compa...

DV Encoder Type 2: Encoder Type 2 generates a VfW compatible AVI file format. Such file has separate streams for audio and video and it can also be processed through DirectShow. T

Panning and zooming a component, Panning and zooming Components (such as yo...

Panning and zooming Components (such as your Polybounce or Animation) is simply a matter of reFrameing the world window. To pan right or left horizontally, one shifts it in the pos

Scientific visualization, Scientific Visualization This is complex for...

Scientific Visualization This is complex for the human brain to create sense out of the large volume of numbers produced through a scientific computation. Statistical and nume

Important point about the de casteljeau algorithm, Important point about th...

Important point about the De casteljeau algorithm 1)      Bezier Curve: P (u) =    ................     (1) Here B n,i (u) = n c i u i (1 - u) n-i        ..

List out the merits of plasma panel display, List out the merits of Plasma ...

List out the merits of Plasma panel display?  Merits  Refreshing is not needed Produce a very steady image free of Flicker Less bulky than a CRT. Demerits

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd