Digitizer (Input Device)



DIGITIZER (Input Device)
A.    Definition and History of Digitizer 
Digitizer or some people called graphic tablet is a tool used to convert hand-drawn images into a format suitable for computer processing. Images are usually drawn onto a flat surface with a stylus and then appear on a computer monitor or screen.  Another definition digitizer is a computer input device that enables a user to hand-draw images, animations and graphics, similar to the way a person draws images with a pencil and paper. These tablets may also be used to capture data or handwritten signatures. It can also be used to trace an image from a piece of paper which is taped or otherwise secured to the surface. Capturing data in this way, by tracing or entering the corners of linear poly-lines or shapes, is called digitizing. The device consists of a flat surface upon which the user may "draw" or trace an image using an attached stylus, a pen-like drawing apparatus. The image is displayed on the computer monitor, although some graphics tablets also have a screen.



            Digitizers were popularized in the mid 1970s and early 1980s by the commercial success of the ID (Intelligent Digitizer) and BitPad manufactured by the Summagraphics Corp. These digitizers were used as the input device for many high-end CAD (Computer Aided Design) systems as well as bundled with PC's and PC based CAD software like AutoCAD.

B.     The Advantages of Digitizer
1.    Digitizers are automatically perform diagnostic self-tests on power-up. If a fault is detected, a distinctive alarm is set off. This feature assures proper operation and alerts the user to possible problems that could cause measurement inaccuracies.
2.    Digitizers are designed to be used in both office and industrial environments. The electronic signals used in digitizing are so minute that they won’t affect the data on floppy disks, yet the system is so sensitive that you can accurately digitize through a whole book of blueprints.
3.      Digitizers also very reliable cables and switches and their systems generate no heat or noise.
4.      Digitizers are easy to use by virtue of each system’s exclusive Super Set Menu.
5.      A digitizer is a faster and more accurate tool for doing takeoffs, especially when measuring areas or volumes.
6.   Many estimating programs allow the user to run the complete system from a “menu” on the digitizer instead of using the computer keyboard.
7.  A digitizer, in combination with on-screen graphics, can provide the estimator immediate verification of all takeoff input.
8.   Today’s modern technology and portable hardware allow the estimating system to be taken directly to the job site or plan room. Having the right tools on location increases productivity.
9.     A computerized estimating system with a digitizer will help enhance your professional image by providing a faster, more accurate and reliable method to estimate and bid on jobs.
10.  Computerized estimating system with a digitizer will help eliminate cost overruns and delays that often result from incorrect measurements, miscalculations and labor or material shortages

REFERENCES
1.      © GTCO CalComp Peripherals Inc, 2003.
2.      http://whatis.techtarget.com/definition/digitizer-tablet-digitizer-or-graphics-tablet
3.      http://en.wikipedia.org/wiki/Graphics_tablet
4.      https://www.youtube.com/watch?v=AxhJ4pm62Ho
5.      https://www.google.com/search?q=digitizers




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