DC014 Lecture Note & Tutorial

Examples of Biometric Technology














• Fingerprints






• Hand geometry






• Facial features






• Voice






• Signatures






• Eye patterns







–Iris






–Retinal

Examples of Biometric Technology















• A fingerprint reader, or scanner, captures





curves and indentations of a fingerprint.






• A face recognition system captures a live





face image and compares it with a stored





image to determine if the person is a





legitimate user.







• Biometric devices measure the shape and




size of a person’s hand using a hand





geometry system.

Examples of Biometric Technology















• A fingerprint reader, or scanner, captures





curves and indentations of a fingerprint.






• A face recognition system captures a live





face image and compares it with a stored





image to determine if the person is a





legitimate user.







• Biometric devices measure the shape and




size of a person’s hand using a hand





geometry system.

Examples of Biometric Technology















• A voice verification system compares a





person’s live speech with their stored voice





pattern.






• A signature verification system recognizes





the shape of your handwritten signature, as





well as measures the pressure exerted and





the motion used to write the signature.

Examples of Biometric Technology















• A voice verification system compares a





person’s live speech with their stored voice





pattern.






• A signature verification system recognizes





the shape of your handwritten signature, as





well as measures the pressure exerted and





the motion used to write the signature.

Examples of Biometric Technology















• The camera in an iris recognition system





uses iris recognition technology to read





patterns in the iris of the eye.






• Some organizations use retinal scanners,





which work similarly but instead scan





patterns of blood vessels in the back of the





retina.

Examples of Biometric Technology















• The camera in an iris recognition system





uses iris recognition technology to read





patterns in the iris of the eye.






• Some organizations use retinal scanners,





which work similarly but instead scan





patterns of blood vessels in the back of the





retina.

2.4 Output devices














Learning Outcomes:






• At the end of this lesson, students should be




able to:





• Identify the output devices





• Explains the functions of output devices





• Output devices





– display devices, printer, speaker,




headphones and ear buds, data



projectors, Interactive whiteboards, force-



feedback game controllers

2.4 Output devices














Learning Outcomes:






• At the end of this lesson, students should be




able to:





• Identify the output devices





• Explains the functions of output devices





• Output devices





– display devices, printer, speaker,




headphones and ear buds, data



projectors, Interactive whiteboards, force-



feedback game controllers

Introduction















• Output is data that has been processed into





a useful form.

Introduction















• Output is data that has been processed into





a useful form.

Output Devices















• An output device is any hardware





component that conveys information to





one or more people.

Output Devices















• An output device is any hardware





component that conveys information to





one or more people.

Output Devices














• Computer output comes in two (2) forms:




–hard-copy




• The most common hard-copy output devices are


printers and plotters.





• Hard-copy output is produced on a hard medium,


such as paper or film.












–soft-copy



• Soft-copy output is temporarily displayed on a


surface, typically a video screen.



• The terminal monitor can provide you with soft copy


of program output.

Output Devices














• Computer output comes in two (2) forms:




–hard-copy




• The most common hard-copy output devices are


printers and plotters.





• Hard-copy output is produced on a hard medium,


such as paper or film.












–soft-copy



• Soft-copy output is temporarily displayed on a


surface, typically a video screen.



• The terminal monitor can provide you with soft copy


of program output.

Seven (7) Types of Output Devices















1. Display Devices







2. Printer






3. Speaker







4. Headphones and Ear Buds







5. Data Projectors






6. Interactive Whiteboards







7. Force-Feedback Game Controllers

Seven (7) Types of Output Devices















1. Display Devices







2. Printer






3. Speaker







4. Headphones and Ear Buds







5. Data Projectors






6. Interactive Whiteboards







7. Force-Feedback Game Controllers

Display Devices















• A display device is an output device that





visually conveys text, graphics, and video





information.













• Two (2) types of display devices are:






1. CRT monitors






2. Flat-panel displays

Display Devices















• A display device is an output device that





visually conveys text, graphics, and video





information.













• Two (2) types of display devices are:






1. CRT monitors






2. Flat-panel displays

CRT Monitors















• It is a desktop monitor that contains a





cathode-ray tube (CRT).






• It is less expensive.







• It is the type of monitor that was first used in





television sets, takes up a lot of desk space,





and is now largely obsolete.

CRT Monitors















• It is a desktop monitor that contains a





cathode-ray tube (CRT).






• It is less expensive.







• It is the type of monitor that was first used in





television sets, takes up a lot of desk space,





and is now largely obsolete.

Flat-Panel Displays















• A flat-panel display is a lightweight display





device which means they have a shallow





depth and flat screen.











• Types of flat-panel displays include:






• LCD monitors





• Plasma monitors





• LED monitor

Flat-Panel Displays















• A flat-panel display is a lightweight display





device which means they have a shallow





depth and flat screen.











• Types of flat-panel displays include:






• LCD monitors





• Plasma monitors





• LED monitor

Types of Flat-panel Displays















• LCD Monitors






• It is a desktop monitor that uses a liquid





crystal display to produce images.





• It produces sharp and flicker free images.






• It was first used in laptops, type of





monitor produces an image using a liquid




crystal material made of large, easily





polarized molecules.

Types of Flat-panel Displays















• LCD Monitors






• It is a desktop monitor that uses a liquid





crystal display to produce images.





• It produces sharp and flicker free images.






• It was first used in laptops, type of





monitor produces an image using a liquid




crystal material made of large, easily





polarized molecules.

Types of Flat-panel Displays















• Plasma Monitors






• It is a display device that uses gas plasma





technology. It offers larger screen sizes




and high-quality display.






• This type of monitor provides high





contrast and high-quality color, is





expensive and heavy, and is generally only




available in large commercial sizes.

Types of Flat-panel Displays















• Plasma Monitors






• It is a display device that uses gas plasma





technology. It offers larger screen sizes




and high-quality display.






• This type of monitor provides high





contrast and high-quality color, is





expensive and heavy, and is generally only




available in large commercial sizes.

Types of Flat-panel Displays















• LED Monitors






• An LED display is a flat panel display,





which uses an array of light-emitting




diodes as a video display.






• This technology provides a better range





and accuracy of color and uses less power





than earlier technologies, and is generally




used to provide backlighting in a flat-





panel monitor.

Types of Flat-panel Displays















• LED Monitors






• An LED display is a flat panel display,





which uses an array of light-emitting




diodes as a video display.






• This technology provides a better range





and accuracy of color and uses less power





than earlier technologies, and is generally




used to provide backlighting in a flat-





panel monitor.

Printer















• A printer is an output device that produces





text and graphics on a physical medium





such as paper.

Printer















• A printer is an output device that produces





text and graphics on a physical medium





such as paper.

Printer














• Printed information, called hard copy, exists




physically and is a more permanent form of





output than that presented on a display





device (soft copy).







• Two (2) types of printer include:





1. Impact printers






2. Nonimpact printers

Printer














• Printed information, called hard copy, exists




physically and is a more permanent form of





output than that presented on a display





device (soft copy).







• Two (2) types of printer include:





1. Impact printers






2. Nonimpact printers

Impact Printers














• An impact printer forms characters and




graphics on a piece of paper by striking a




mechanism against an inked ribbon that




physically contacts the paper.










• Impact printers characteristically are noisy




because of this striking activity.

Impact Printers














• An impact printer forms characters and




graphics on a piece of paper by striking a




mechanism against an inked ribbon that




physically contacts the paper.










• Impact printers characteristically are noisy




because of this striking activity.

Impact Printers














• Impact printers are ideal for printing multipart




forms because they easily print through many



layers of paper.














• Factories, warehouses, and retail counters may




use impact printers because these printers




withstand dusty environments, vibrations, and




extreme temperatures.

Impact Printers














• Impact printers are ideal for printing multipart




forms because they easily print through many



layers of paper.














• Factories, warehouses, and retail counters may




use impact printers because these printers




withstand dusty environments, vibrations, and




extreme temperatures.

Impact Printers












• Two commonly used types of impact printers




are:













1. Dot-matrix printers





 A dot-matrix printer produces printed images when



tiny wire pins on a print head mechanism strike an


inked ribbon.









2. Line printers





 A line printer prints an entire line at a time.

Impact Printers












• Two commonly used types of impact printers




are:













1. Dot-matrix printers





 A dot-matrix printer produces printed images when



tiny wire pins on a print head mechanism strike an


inked ribbon.









2. Line printers





 A line printer prints an entire line at a time.

Nonimpact Printers














• A nonimpact printer forms characters and




graphics on a piece of paper without




actually contacting the paper.










• Some spray ink, while others use heat or




pressure to create images.

Nonimpact Printers














• A nonimpact printer forms characters and




graphics on a piece of paper without




actually contacting the paper.










• Some spray ink, while others use heat or




pressure to create images.

Nonimpact Printers
















• Commonly used nonimpact printers:






i. Ink-jet printers






ii. Laser printers





iii. Plotters

Nonimpact Printers
















• Commonly used nonimpact printers:






i. Ink-jet printers






ii. Laser printers





iii. Plotters

Nonimpact Printers












• Ink-jet printers






Spray tiny drops of liquid ink onto a piece of




paper.






Popular for the use in the home/personal





use.






Can print black / white and several different





colors.

Nonimpact Printers












• Ink-jet printers






Spray tiny drops of liquid ink onto a piece of




paper.






Popular for the use in the home/personal





use.






Can print black / white and several different





colors.

Nonimpact Printers












• Laser printers






Used a laser beam and powdered ink to




transfer images onto paper.






Usually use at office






Cost more than ink-jet printers





Print at faster speeds than ink-jet printers






Is a high-speed and high quality





nonimpact printer.

Nonimpact Printers












• Laser printers






Used a laser beam and powdered ink to




transfer images onto paper.






Usually use at office






Cost more than ink-jet printers





Print at faster speeds than ink-jet printers






Is a high-speed and high quality





nonimpact printer.

Nonimpact Printers











• Plotters






• Is a sophisticated printers used to produce





high-quality drawings such as blue-prints,




maps and circuit diagrams.






• Used in specialized fields such as





engineering and drafting and usually are




very costly.

Nonimpact Printers











• Plotters






• Is a sophisticated printers used to produce





high-quality drawings such as blue-prints,




maps and circuit diagrams.






• Used in specialized fields such as





engineering and drafting and usually are




very costly.

Nonimpact Printers











• They are also used alongside software





programs such as AutoCAD® and other




drafting and technical drawing programs.



















































Plotter