Fichas
Chapter 16
Fichas del conjunto (12)
- 1Bar CodesIntroduced in 1970, Enables rapid data transfer from print to digital formats, used on most product packaging, revolutionized the purchase and inventory control of many items.
- 2Uniform Product CodeOver see supermarkets and retail store bar codes. Assigns a unique numerical signature which identifies the specific grocery product and its manufacturer.
- 3International Standard Book Number (ISBN) SystemUsed in bookstores; this identifies the title, author, original price and the country that published it.
- 4Bar Code Reading HardwareUse two basic elements: the Reader and the code.
Use a laser that is reflected and read by the photodetector - 5Under-Counter ScannersThe laser scanning system is housed below a counter, with light passing through a sapphire optical window
- 6Rotating Mirror SystemsThe most common type of under- counter bar code reader uses a rotating multifaceted mirror.
- 7How do bar codes work?Bars = black rectangles
Spaces = white intervals between the bars
Both, bars and spaces are often denoted with the term elements. - 8Bar Code Structuretwo classes of bar codes:
1) delta codes
2) width codes. - 9What are Delta codes?Subdivide the available label into bits of equal width. Binary 1's are painted in black and form the bars, while binary 0's form the intervals or spaces
EAN-13 code (European Article Numbering) - 10What are Width codes?Wide elements to represent the 1 bits and narrow elements to represent the 0 bits, irrespective of color. Usually, a wide element has twice the width of a narrow element.
* is always/only used at beginning and end - 11Postal SortingMulti-Line Optical Character Readers (MLOCR) and Remote Barcoding Systems (RBCS) read handwritten labels and attach a QR code to the box.2
- 12QR CodesMore easily captured with a camera
Información
- Descripción
- Optics Test 3 Fichas sobre Chapter 16, creado por Matt Penny el 18/04/2018.
- Creado por
- Matt Penny
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- Creado por Matt Penny · 18 abr 2018
- Copiado por Matt Penny · 18 abr 2018
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