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Application of IoT Smart Home and Bar Code Recognition Technology

- May 16, 2018 -

Application of IoT Smart Home and Bar Code Recognition Technology


Reading: Bar Code - Birth Certificate of the Internet of Things In today's society, almost all of the goods on the packaging, there is a set of gray and white striped labels This is the bar code we referred to bar code.

[What is a barcode, the origin of the Internet of Things barcode]

Bar Code - Birth Certificate of Internet of Things In today's society, almost all of the goods on the packaging, there is a set of gray and white stripes of the label This is the barcode we abbreviated bar code. It is the “common language” for goods passing through the international market. It is the passport for the entry of goods into the international market and supermarkets. It is one of the most important identifiers in the global unified identity system and general business language. Barcode technology first appeared in the 1920s when an inventor named John Kermode “wishfully” wanted to automate the sorting of postal documents. His idea is to put a barcode on the envelope and the information in the barcode is the address of the recipient, just like today's zip code invented the earliest barcode symbol for this Ker-mode.

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Internet of Things Smart Home and Bar Code Recognition Technology Application

Internet of Things barcode

[What is a 1D barcode, 2D barcode, 3D barcode]

The current bar code refers to an identifier consisting of a set of regularly arranged bars, spaces, and their corresponding characters, used to represent the symbols of certain product information. Among them, dark bars are used for scanning reading of barcode reading devices (infrared or photoelectric sensors, etc.). The corresponding English characters are composed of a group of numbers to provide us with direct recognition and reading or input of the data we want to the computer through the keyboard, and the information represented by this group of blank spaces and corresponding characters is the same.

A one-dimensional bar code only expresses related information in one direction (usually the horizontal direction) and does not express any information in the vertical direction. Its height is usually to facilitate the alignment of the reader. It is characterized by the fact that the error rate recorded by people who record information at a time is low, but the data capacity is small and the bar code cannot be read after it is damaged. Barcodes that store information in two dimensions, horizontal and vertical, are called two-dimensional barcodes.

Internet of Things Smart Home and Bar Code Recognition Technology Application

Commonly used one-dimensional barcode

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The emergence of two-dimensional barcodes compensates for the inadequacies of one-dimensional barcodes, which are characterized by high information density and large capacity, which can not only prevent mistakes but also correct mistakes. Even if the bar code is partially damaged, it can restore the correct information to a variety of reading devices. Read it.

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Commonly used 2D barcode

A three-dimensional bar code consists of 24 colors, and the information that can be carried is 0. The capacity of 6MB to 1.8MB is enough to get the next MP3 or a small video. Currently, there are color bar codes introduced and their applications in related multimedia fields; the introduction of high-capacity color bar code three-dimensional matrix bar codes; China has also made considerable breakthroughs in the field of three-dimensional color bar code. Now arbitrary three-dimensional bar code is A high-quality color bar code stores a large amount of information. Three-dimensional barcodes increase the amount of information stored by adding color or grayscale, and increase the density of information storage per unit area.

Internet of Things Smart Home and Bar Code Recognition Technology Application

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Common 3D barcode

[The difference between the advantages and disadvantages of the barcode type]

Therefore, it has obvious advantages over one-dimensional and two-dimensional barcodes. The amount of stored information is large. The encoding of high-quality barcodes follows the principle of uniqueness to ensure that commodity barcodes do not repeat around the world. That is, a commodity item can only have one code or A code can only identify one product item. In different specifications, different packaging, different varieties, different prices, different colors of goods can only use different commodity codes. Barcode technology is widely used in many fields such as commerce, books, postal services, warehouses, industry, agriculture, and transportation. It still occupies an important position in today's automatic identification technology.

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