Inputting Data In Other Ways

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Presentation transcript:

Inputting Data In Other Ways Chapter 2B Inputting Data In Other Ways

Devices for the Hand Pen based input Tablet PCs, PDA Pen used to write data The device is called stylus Pen used as a pointer as well like mouse Handwriting recognition Used to take notes Taking signature Teaching tip Microsoft has a demonstration of the tablet PC pen based input. Point your browser to http://www.microsoft.com/windowsxp/tabletpc/evaluation/tours/default.mspx and follow the tours.

Devices for the hand Touch screens Input allows the user to place a fingertip directly on screen Sensors determine where finger points Sensors create an X,Y coordinate Usually presents a menu to users More robust Easy to use ATM booth Discussion point Discuss the information kiosks at local malls. Many offer limited Internet access. Have students discuss what could happen to the computers if the malls were to provide keyboards to the mall shoppers.

Devices for the hand Game controllers Accepts input from user through controller Enhances gaming experience Provide custom input to the game Two categories: Joystick, Game pad Modern controllers offer feedback Teaching tip Microsoft’s Force Feedback joysticks vibrate. In driving games, when the player hits another car, the joystick will vibrate.

Optical Input Devices Scanners Handheld Flatbed Bar code readers commonly track sales in retail stores Bar code Reader or Scanner : handheld and flatbelt Image Scanner or Optical character recognition OMR (Optical Mark Reader) or Mark sense reader

Optical Input Devices - Scanner Image scanners Converts printed image into electronic form by shining light on the image Reflects light off of the image Sensors read the intensity Filters determine color depths Useful because can be stored in a computer Teaching tip Spend a few minutes here discussing computer screen colors. A good website to look at colors is http://www.radok.com/web-safe-colors_rgb.html. To demonstrate how computers generate color, use the custom color creator in Paint.

Optical Input Devices – Scanner (Cont.) Special software for scanner: Optical character recognition (OCR) Converts scanned text into editable text Each letter is scanned Letters are compared to known letters Best match is entered into document Rarely 100% accurate Teaching tip Many companies ask for a plaintext resume. This is a resume, typed in Courier or other easy to read font, with no formatting. The intent is to allow the company to scan the resume for future searching. OCR technology makes this possible. For more information, see the website http://www.quintcareers.com/scannable_resumes.html.

Optical Input Devices – OMR OMR (Optical Mark Reader) Excellent for large amount of MCQ type format such as in examinations, or survey questioner.

Audiovisual Input Devices Microphones Used to record speech Speech recognition “Understands” human speech Useful for audio and video conferencing Analog sound can be converted into digital code that computer can store and process. The process is called digitizing These files can be used in documents, web pages or email them to other people Insider information Two common products are IBM’s Via Voice and Scansoft Dragon NaturallySpeaking. More information for ViaVoice can be found at http://www-306.ibm.com/software/voice/viavoice/. More information regarding Dragon is located at http://www.scansoft.com/naturallyspeaking/.

Audiovisual Input Devices Musical Instrument Digital Interface MIDI Connects different musical instruments to computer Digital recording or playback of music Musicians can produce professional results

Audiovisual Input Devices Video Input A PC video camera captures video Used in presentation and on web pages where the viewers can start, stop and control it. A popular PC video camera is webcam Using video card other video devices can be connected with PC

Audiovisual Input Devices Digital cameras Captures images electronically No film is needed Image is stored as a JPG file Memory cards store the images Used in a variety of professions The image can be copied to a PC where it can be edited. printed

Chapter 2B End of Chapter