2d line segment generation - 2d shape primitives, Computer Graphics

Assignment Help:

2D Line Segment Generation 

A digitally plotted line is basically an approximation of infinite number of points on an abstract line segment by only a finite number of points on a computer display.  This is needed because the display devices can only plot a finite number of points, however large the resolution of the device may be.  So, the key concept of any line drawing algorithm is to provide an efficient way of mapping a continuous abstract line into a discrete plane of computer display. 

This process is called rasterization or scan conversion.  These algorithms basically approximate a real valued line by calculating pixel coordinates to provide an illusion of line segment.  Since the pixels are sufficiently small, the approximation gives a good illusion of a continuous line segment to the human eyes.  To understand what is meant by rasterization, we plot a line segment on a pixel grid as shown in Fig (a).  The segment points are scan converted and approximated by a single shaded pixel as shown in Fig (b). Here we have shown a pixel by a square, but you know that a pixel actually has a disc shape with the boundary marked as the visible portion of the dot formed by the striking electron gun. The pixel shown here is the bounding rectangle of that dot.


Related Discussions:- 2d line segment generation - 2d shape primitives

Web-based services, Web-based Services: Commonly utilized software is: ...

Web-based Services: Commonly utilized software is: Protected Area Archive characteristics: Image display, roam, zoom and Image enhancement. Simple image processing.

Photo editing, Photo Editing Photo-editing programs are paint programs...

Photo Editing Photo-editing programs are paint programs: it just like they comprise several sophisticated functions for altering images and for scheming aspects of the image,

Bezier curves - 2d shape primitives, Bezier curves: Theses are special...

Bezier curves: Theses are special polynomial curves expressed using Bernstein polynomials. Spline curves are simple extensions of Bézier curves composed of two or more polynom

Uncompressed and common audio format, Uncompressed / Common Audio Format ...

Uncompressed / Common Audio Format There is one main uncompressed audio format: PCM. It is generally stored like a .wav on Windows. WAV is file format which is flexible and des

Understanding the concept of hypertext and hypermedia, Understanding the Co...

Understanding the Concept of hypertext and hypermedia: For know the principle of Hypertext and Hypermedia we will look at how the human memory works.

Briefly explain modes and switches, Question 1 Write a note on: Audio Spec...

Question 1 Write a note on: Audio Spectrum & Audio Waveform Question 2 What is high dynamic range color? Explain gradient color Question 3 Describe Time-Remapping

Drawing program with object- oriented design, For this assignment, you will...

For this assignment, you will add to the drawing program new features that are similar to features that you already have. Apply object-oriented design concepts such as inheritance

High level techniques - motion specification, High Level Techniques (Motion...

High Level Techniques (Motion Generalized) These are techniques utilized to explain the general motion behavior of any type of graphic object. Such techniques are algorithms o

Soft image and strata studio - computer animation, Soft Image and Strata ...

Soft Image and Strata Studio - Computer Animation SoftImage It is the one of most well known computer animation software packages. It is used in several top production

Raster scan display processor, Draw the block diagram of raster scan displa...

Draw the block diagram of raster scan display processor.

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