Scan line algorithm and seed fill algorithm, Computer Graphics

Assignment Help:

Scan line algorithm and seed fill algorithm

Two basic approaches are followed in area filling on raster systems.  In the first approach overlap intervals for scan lines that cross the area are determined per scan line.  Remember that a scan line is a horizontal line of pixels that can be plotted on the display device when the electron beam traverses the display area horizontally during one horizontal retrace. Second approach begins with an interior point and fills the area moving outward from this point until the boundary condition is reached.  An algorithm following the first approach is classified as scan line algorithm and that falling under second class is called seed fill algorithm.  Simple objects such as polygons, circles etc. are efficiently filled with scan line fill algorithms and more complex regions use the seed fill method. The scan line algorithm is mostly used in general graphics packages.

1326_scan line algorithm and seed fill algorithm.png

Let us begin with scan line polygon fill algorithm.  Notice that polygons can be as simple as a triangle and could be as complicated as the one shown in Figure below.

2399_scan line algorithm and seed fill algorithm 1.png

These are self intersecting polygons.  We broadly keep the polygons in one of the three categories (i) convex (ii) concave (iii) self intersecting.  Mathematically, a self intersecting polygon is concave.  You will deal with such polygons in greater details for the purpose of area filling.


Related Discussions:- Scan line algorithm and seed fill algorithm

Scripting systems- computer animation, Scripting Systems- Computer Animatio...

Scripting Systems- Computer Animation Scripting Systems are the earliest type of motion control systems. Scripting systems permit object specifications and animation sequenc

Scancode, what is mean by scan code

what is mean by scan code

Describe the wiggler function in animation help, Question 1: (a) Descri...

Question 1: (a) Describe the term Mask Path and give brief steps how you could change a rectangle into a triangle with respect to time in AE CS3. (b) Expressions are ve

Common steps of designing the animation sequence, Common Steps of Designing...

Common Steps of Designing the Animation Sequence Common Steps of designing the animation sequence are as given: 1) Layout of Storyboard: Storyboard layout is the action ou

What is multimedia, What is Multimedia: People only remember 20 percent of...

What is Multimedia: People only remember 20 percent of what they see and 30 percent of what they hear. But they keep in mind 50 percent of what they see and hear and as much as 80

Advantages of jpeg images, Advantages of JPEG Images Huge compressi...

Advantages of JPEG Images Huge compression ratios mean sooner download speeds. JPEG produces outstanding results for main photographs and complicated images. JPEG s

Adobe premiere - softwares for computer animation, Adobe Premiere - Softwar...

Adobe Premiere - Softwares for computer animation It just like the name as is generated by Adobe. This is a tool used to composite digitized video, stills and applies a variet

Fill in the blanks, a__________of a scene is apart of a scene by which rela...

a__________of a scene is apart of a scene by which relate one part of the scene with the other parts of the scene

What is graphics, What is Graphics It is a term that refers to any com...

What is Graphics It is a term that refers to any computer device or program which makes a computer able of displaying and manipulating pictures. The name also refers to the im

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