Podcast
Questions and Answers
Which of the following best describes computer graphics?
Which of the following best describes computer graphics?
- The design of computer operating systems.
- The analysis of network protocols.
- The study of computer hardware components.
- The use of programming to display images on computer screens. (correct)
Which of the following is not a typical function of computer graphics?
Which of the following is not a typical function of computer graphics?
- Transformation and animation of objects.
- Managing operating system updates. (correct)
- Rendering and finalizing images.
- Imaging and drawing 2D images.
Lighting is most closely associated with which aspect of computer graphics?
Lighting is most closely associated with which aspect of computer graphics?
- Coloring (correct)
- Clipping
- Viewing
- Transformation
Which of the following application is least related to computer graphics?
Which of the following application is least related to computer graphics?
Which discipline is least directly involved in the interdisciplinary field of computer graphics?
Which discipline is least directly involved in the interdisciplinary field of computer graphics?
Which of the following software is not primarily used for graphics?
Which of the following software is not primarily used for graphics?
What does the term 'free' mean in the context of Blender software?
What does the term 'free' mean in the context of Blender software?
Which operating systems support Blender?
Which operating systems support Blender?
In a computer graphics system, what is the role of the frame buffer?
In a computer graphics system, what is the role of the frame buffer?
How would you calculate the memory required in MB for a frame buffer with a resolution of 1920x1080 and a bit depth of 24 bits per pixel?
How would you calculate the memory required in MB for a frame buffer with a resolution of 1920x1080 and a bit depth of 24 bits per pixel?
In a monochrome display, how many levels of intensity are typically available for each pixel?
In a monochrome display, how many levels of intensity are typically available for each pixel?
Consider a 3-bit color display system. Which of the following is the correct number of distinct colors that can be displayed?
Consider a 3-bit color display system. Which of the following is the correct number of distinct colors that can be displayed?
Which list contains only input devices used in computer graphics?
Which list contains only input devices used in computer graphics?
What is the primary function of an output device in a graphics system?
What is the primary function of an output device in a graphics system?
What characteristic defines calligraphic CRT?
What characteristic defines calligraphic CRT?
Which of the following is characteristic of raster-scan displays?
Which of the following is characteristic of raster-scan displays?
What does 'display resolution' refer to in the context of computer displays?
What does 'display resolution' refer to in the context of computer displays?
What is the unit 'Hertz (Hz)' used to measure in computer displays?
What is the unit 'Hertz (Hz)' used to measure in computer displays?
What is the purpose of having a high refresh rate on a display?
What is the purpose of having a high refresh rate on a display?
If a display is capable of showing 16.7 million colors, approximately what is its color depth?
If a display is capable of showing 16.7 million colors, approximately what is its color depth?
What is the working principle behind 'Thin/Slim CRT' technology?
What is the working principle behind 'Thin/Slim CRT' technology?
What is the functional role of the polarizers in an LCD?
What is the functional role of the polarizers in an LCD?
How are pixels addressed in an LCD screen?
How are pixels addressed in an LCD screen?
In plasma panel technology, what role does neon gas play?
In plasma panel technology, what role does neon gas play?
Which of the following is an advantage of plasma displays over LCDs?
Which of the following is an advantage of plasma displays over LCDs?
Which of the following is considered a three-dimensional viewing device?
Which of the following is considered a three-dimensional viewing device?
What is the primary function of shutter glasses in a stereoscopic viewing system?
What is the primary function of shutter glasses in a stereoscopic viewing system?
Which factor does not contribute directly to a computer display standard?
Which factor does not contribute directly to a computer display standard?
On a graphics display, what is the effect of increasing the bits per pixel (bpp)?
On a graphics display, what is the effect of increasing the bits per pixel (bpp)?
What is the main purpose of the deflection apparatus in a CRT?
What is the main purpose of the deflection apparatus in a CRT?
In LCD technology, what happens when the polarizers are aligned perpendicular to each other and no electric field is applied?
In LCD technology, what happens when the polarizers are aligned perpendicular to each other and no electric field is applied?
Which statement accurately describes the refresh rate and flicker perception?
Which statement accurately describes the refresh rate and flicker perception?
What best describes the technological goal of stereoscopic 3D viewing devices?
What best describes the technological goal of stereoscopic 3D viewing devices?
Flashcards
Computer Graphics
Computer Graphics
The field of how to draw pictures on computer screens with programming.
Computer Graphics Capabilities
Computer Graphics Capabilities
Creating images, Coloring, Viewing with Cameras, Clipping, Rendering Process, Transformation & animation
Frame Buffer
Frame Buffer
Video memory that holds the image displayed on the screen.
Input Devices
Input Devices
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Output Devices
Output Devices
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Cathode-Ray Tube (CRT)
Cathode-Ray Tube (CRT)
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Refresh Rate
Refresh Rate
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Computer Display Standards
Computer Display Standards
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LCD (Liquid Crystal Display)
LCD (Liquid Crystal Display)
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Plasma Panel
Plasma Panel
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Raster Scan
Raster Scan
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Study Notes
- Computer graphics is drawing pictures on computer screens through programming.
Computer Graphics Capabilities
- Imaging involves the creation of 2D images.
- Coloring includes lighting effects.
- Viewing involves camera and stereo camera perspectives.
- Clipping is used.
- Rendering ia a finalization process.
- Transformation and animation simulates change over time.
Computer Graphics Applications
- GUIs: Graphical User Interfaces
- Weather Maps: Provide real-time mapping.
- Satellite imaging: Generates geodesic images.
- Medical imaging is an application.
- Engineering drawings, especially mechanical ones, utilize this.
- Architecture, art, and training programs use computer graphics.
- Flight simulators provide training.
- Movies and games utilize computer graphics for entertainment.
- Simulation and modeling (e.g., Parachute trainer)
- Cell phones display graphics.
Graphics Software Programs
- Categories include: Unity, Open GL, AutoCAD, Autodesk 3ds Max, Inkscape, GIMP, Maya, Blender, Scratch, Adobe Illustrator, Adobe Indesign, and Adobe Flash.
Blender
- A free and open-source 3D creation tool.
- The software is "free as in freedom", granting rights to use the program for any purpose
- Users have rights to modify the program, access source codes, copy, distribute, improve, and release own versions.
Installing Blender
- Download the latest version from www.Blender.org
- It is available on Windows, macOS, and Linux.
Computer Graphics System
- It consists of both software tools alongside the hardware
- Hardware includes Input, Output, and memory
Input and Output Devices
- Users communicate with interactive graphics systems through input devices
- Examples of input devices: keyboard, mouse, joystick, light pen, graphics tablet (digitizer), touch panels, voice systems, and scanners.
- A primary output device in a graphics system is a video monitor.
- Examples of video monitors are: Cathode Ray Tube (CRT) and Liquid Crystal Display (LCD).
- Hard-copy output can be obtained from slides film, printers, and plotters.
Output Devices
- Cathode-ray tube (CRT) is the dominant type of display.
- Electrons strike the phosphor coating on the tube, and light is emitted.
- The beam is controlled by deflection plates.
- The digital output is converted to analog voltage for the deflection plates via a digital-to-analog converter.
- Random-scan (calligraphic) CRT: the beam moves directly from one position to another.
Raster Scan Displays
- Involve horizontal and vertical retrace.
Random Scan Displays
- Also known as Vector-Scan Displays
Computer Display Standards
- Display standards or display modes are a combination of: Display resolution (width and height in pixels), color depth (in bits), and refresh rate (in Hertz).
Computer Display Standard - Additional Bits
- Each additional bit doubles the number of colors available. -A 2 bpp image has 4 colors. -A 3 bpp image has 8 colors. -8 bpp has 256 colors. -16 bpp has 65,536 colors (Highcolor). -24 bpp ≈ 16.7 million colors (Truecolor).
Thin/Slim CRT
- These are produced by bending a normal CRT in the middle.
- Deflection apparatus is modified to steer electron beams by 90 degrees to focus on the screen.
LCD (Liquid Cristal Display)
- LCD consists of a layer of liquid crystal, sandwiched between two polarized plates.
- Polarizers are aligned so light will be blocked.
- LCD displays are addressed in a matrix fashion.
- Rows and Columns are defined by a thin layer of vertical transparent conductors
- Intersection of the conductors defines the pixel position.
Three-Dimensional Viewing Devices
- Vibrating flexible mirror devices
- Stereoscopic and virtual devices like reality systems, shutter glasses (with tracking), headset with tracking, and other VR devices
- Holograms
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