Method 1: You need to scan the QR code on the resume of 58 cities with your mobile phone. The commonly used method to quickly print the QR code of WeChat is to enter the settings of WeChat, enter personal information, click my QR code, click the menu button in the upper right corner, and select Save to your mobile phone from the pop-up menu. Then, you can find your own QR code from the photos of your mobile phone, connect your mobile phone with your computer with a data cable, and copy it to other places.

Method 2: Take a direct screenshot of the QR code on 58 resumes in the same city, but the clarity may be discounted. Use the screenshot function of QQ and some browser plug-ins, turn the page to the part containing the QR code, click "Screenshot", select the QR code area, and click "Save".

Method 3: Use the function of "Save the webpage as a picture" in non-IE browsers such as Sogou browser, Firefox browser, Google browser and Window of the World browser, click the file (QR code on the resume of 58 cities), and then click "Save as a picture". After saving the picture, use the picture editing software (drawing, etc. ) to intercept the QR code. For example, painting, resizing the window, just keep the QR code.

Second, two types of QR codes:

The QR code has 40 dimensions. The official name is version. Version 1 is the matrix of 2 1 x 2 1, version 2 is the matrix of 25 x 25, and version 3 is the size of 29. With each version added, the size of 4 will increase. The formula is: (V- 1)*4+2 1(V is the version number) is the highest. (40-1) * 4+21=177, so the highest square is 177 x 177.

2D barcode/QR code can be divided into stacked 2D barcode and matrix 2D barcode.

The stacked/row-arranged two-dimensional bar code is formed by stacking a plurality of rows of chopped one-dimensional bar codes;

Matrix Two-dimensional barcode consists of a matrix, in which binary "1" is represented by dot, binary "0" is represented by empty, and the coding consists of the arrangement of dot and empty.

Stacking:

Stacked/line 2D barcode (also called stacked 2D barcode or layered 2D barcode), its coding principle is based on one-dimensional barcode and stacked into two or more lines as required. It inherits some characteristics of one-dimensional bar code in coding design, checking principle and reading mode, and the reading equipment is compatible with bar code printing and one-dimensional bar code technology. However, due to the increase of the number of lines, it is necessary to judge the number of lines, and its decoding algorithm and software are not exactly the same as those of one-dimensional bar code. Representative two-dimensional bar codes are: Code 16K, Code 49, PDF4 17, etc.

Matrix:

Short array two-dimensional bar code (also called chessboard two-dimensional bar code) is coded in rectangular space by the different distribution of black and white pixels in the matrix. In the position of the corresponding element in the matrix, the binary "1" is represented by the appearance of points (squares, points or other shapes), and the binary "0" is represented by the absence of points. The arrangement and combination of points determine the meaning represented by matrix two-dimensional bar code. Matrix two-dimensional bar code is a new coding system based on computer image processing technology and combined coding principle, which can automatically read and process graphic symbols. Representative matrix two-dimensional codes include: code one, Maxi code, two-dimensional code, data matrix and so on.

At present, among dozens of QR codes, the commonly used code systems are: PDF4 17 QR code, Datamatrix QR code, Maxicode QR code, Code 49, Code 16K, Code one and so on. In addition to these common 2D barcodes, there are Vericode barcode, CP barcode, Codablock F barcode, Tian Zi barcode, Ultracode barcode and so on. To detect the quality of bar code, a bar code detector is needed. Because the market capacity is not large, this kind of detector is relatively rare. Only datalgic, HHP, LIVS and webscan are doing it. Trucheck system of webscan Company is the most cost-effective system that can detect dataMatrix. But webscan has not set up an office in China.