# Author Archives: Arkay

## Raster Scan Display

Raster Scan Display The term ‘raster’ is a synonym for the term ‘matrix’. Therefore, a raster scan CRT scans a matrix with an electron beam. Raster scan CRT display is most commonly used in TVs. The various components of raster scan CRT are explained below: Electron Gun Control Electrode Focusing Electrode Deflection Yoke Phosphor Coated… Read More »

## Mid Point Circle Algorithm

Midpoint circle algorithm in an incremental scan conversion method that is similar to Bresenham’s algorithm. This algorithm uses the following function to test the spatial relationship between an arbitrary point (x, y) and a circle with radius r centered at origin. f(x, y) = x2 + y2 – r2 Any point (x, y) on the… Read More »

## Bresenham’s Circle Algorithm

Bresenham’s Circle Algorithm Bresenham’s circle algorithm is an efficient method of generating a circle as compared to polynomial or trigonometric method. It involves only integer addition, subtraction, and multiplication by 2.  It uses the decision parameter or variable to decide which pixels will fall on the circumference of the circle. The algorithm uses eight-way symmetry… Read More »

## Eight way Symmetry

Eight-way Symmetry A circle is a symmetrical figure. It possesses eight-way symmetry. It means when a circle is divided into eight part at 45° angle all eight parts have same shape. The circle generating algorithm takes advantage of the circle symmetry to plot eight points by calculating the coordinates of any one point. Thus, for… Read More »

## Bresenham’s Line Algorithm

Bresenham’s Line Algorithm is a  highly efficient incremental algorithm for scan converting lines. This algorithm was developed by Jack Elton Bresenham in 1962 at IBM. It is better than DDA algorithm as it produces mathematically accurate results using only incremental integer calculations. It avoids the “round-off” functions and uses only integer addition, subtraction and multiplication… Read More »

## Digital Differential Analyzer Algorithm (DDA)

Digital Differential Analyzer Algorithm (DDA) The digital differential analyzer (DDA) is an incremental scan conversion method that is based on calculating either Δx or Δy. This algorithm generates line from their differential equations. The name ‘DDA‘ comes from the mechanical device that is used to solve differential equations by numerical methods. It finds out successive… Read More »

## Components of CRT (Cathode Ray Tube) and its working

Components and Working of CRT (Cathode Ray Tube) A CRT is just like a vacuum glass bottle. The one end of the tube contains electron gun (i.e. the negatively charged cathode) and the other end of tube is a screen that is coated with pattern of dots (phosphor crystals). The electron gun emits the cathode… Read More »

## Computer Graphics and its types

Computer Graphics, Types of Computer Graphics, Applications of Computer Graphics Introduction Computer graphics is a field of computer science that deals with creation, manipulation and storage of pictures, images and drawing using a digital computer. Computer graphics provide an effective method to represent data in form of pictures and images such as graphs, charts thereby… Read More »

## Difference between Cryptocurrency and NFT’s

Difference between Cryptocurrency and NFT’s Cryptocurrency Cryptocurrency are digital assets created using computer networking software that enables secure trading and ownership. It is a digital payment system that doesn’t rely on banks to verify transactions. Cryptocurrencies run on a distributed public ledger called blockchain, a record of all transactions updated and held by currency holders.… Read More »

## Difference between Prokaryotes and Eukaryotes Cells

Difference between Prokaryotes and Eukaryotes Cells Prokaryotic Cells These organisms have primitive and incomplete cells. Thus, they contain prokaryotic cells in their body structure. Prokaryotic cells have all three basic structures of a typical cell but lack nuclear membranes around their genetic substances (DNA). Nuclear material of a prokaryotic cell consists of a single chromosome… Read More »