1.Define Computer graphics

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Computer Graphics involves technology to access. The Process transforms and presents information in a visual form. The role of computer graphics is insensible. Computer Graphics is the creation of pictures with the help of a computer. The end product of computer graphics is a picture it may be a business graph, drawing, and engineering.

2. What are the representative uses of computer graphics?

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Representative Uses of Computer Graphics
• User interfaces: GUI, etc.
• Business, science, and technology: histograms, bar and pie charts, etc.
• Office automation and electronic publishing: text, tables, graphs, hypermedia systems, etc.
• Computer-aided design (CAD): building structures, automobile bodies, etc.
• Simulation and animation for scientific visualization and entertainment: flight simulation, games, movies, virtual reality, etc.
• Art and commerce: terminals in public places such as museums, etc.
• Cartography: map making

3. What are the types of computer graphics?

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Computer graphics can be separated into two categories: Raster graphics and Vector graphics.

4. What is a coordinate system?

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A coordinate system is a system that uses one or more numbers, or coordinates, to uniquely determine the position of a point. It also determines the other geometric elements on a manifold in Euclid's space

5.In a coordinate system how do represent points?

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In a co-ordinate system, any position of a point is denoted as (x,y,z), where x denotes the perpendicular distance of the point from the x-axis. Hence x is the X coordinate and y denotes the perpendicular distance of the point from the y-axis. Hence y is the Y coordinate and z denotes the perpendicular distance of the point from the z-axis. Hence z is the Z coordinate.

6. What is Scan conversion?

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The Scan Converting rate is a technique that is used in video processing. In this technique, we can change the horizontal and vertical frequency for many different purposes. We use a scan converter to perform scan conversions.

7. What are the methods of Scan Conversion?

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We can perform scan conversion by using two methods.
● Analog Method
● Digital Method
Analog Method: It is the best method for analog videos. A large number of delay cells perform the analog method. The Analog approach is also known as the “Non-retentive, memory-less, or real-time method.”
Digital Method: Digital method is also known as a “retentive or buffered method.” In the digital method, there is a concept of n1and n2 speed. We can save (Store) the picture in line or frame buffer with n1 speed. The image can be read with n2 speed.

8. What are the advantages and disadvantages of scan conversion?

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Advantages of Scan Conversion
1. The scan conversion technique is used for various purposes, such as video projectors, TV, HDTV, Video capture card, LCD monitor, etc.
2. The Scan Conversion technique has wide applications.
3. We can efficiently perform scan conversion using high-speed integrated circuits.
Disadvantages of Scan Conversion
1. We can only apply scan conversion with LSI and VLSI integrated circuits.
2. In the digital scan conversion, the analog video signal has changed into digital data.

9.What is the basic difference between Rasterization and Rendering?

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Rendering is a broad term that generally means transforming computer-readable information, for example, objects in a 3d scene, into one or more images. Rasterization is a more specific term that typically means the process of transforming a vector (curve-based) image into a rasterized (pixel-based) image

10. What are the examples of scan converted objects?

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We can apply the conversion to the following objects.
● Line
● Point
● Polygon
● Rectangle
● Filled Region
● Arc
● Character
● Sector
● Ellipse