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RSSSymagery Smart Image Capture: Auto-ID Scanning Equipment
August 26, 2009
•White Paper: Symagery Smart Image Capture
By Psion Teklogix
CaptureData Capture using Automatic Identification techniques is becoming more and more common both in business and everyday life. Much of the basic technology (abbreviated hereafter as AIDC) has been in existence in various forms for decades, but recent advances in electronics, optics, and miniaturization are fuelling the growth of a myriad of applications as capabilities increase at the same time that costs decrease.
Basic AIDC techniques include Bar Code, Radio Frequency Identification (RFID), Optical Character Recognition (OCR), Magnetic Stripe, and Machine Vision. If we expand the definition of AIDC to include technologies that involve an operator, we can also embrace other approaches such as Voice Recognition, Smart Cards, and Touch Memory.
The most prevalent AIDC technology today is Bar Code, which is inherently an optical technique. Originally developed in the 1930's, the beauty of Bar Code is that the information-bearing bar code symbol can be created directly on a variety of packaging, often as part of the existing printed labeling. When considering Bar Code, most people immediately think of an arrangement of varying width bars and spaces like the ubiquitous UPC symbol, however this is only one way to convey information in printed pattern of optical marks. "Conventional" bar code symbols (like UPC) encode information by varying the width of the bars and spaces in a pre-determined fashion (this is called "width modulation"), but it is also possible to vary the height of the bars. This is the approach taken in many large postal applications, and it is called "height modulation". If we broaden our definition of Bar Code still further to include tiered symbols and 2-D arrays of optical marks, the variety of possible symbol structures expands still further.
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