Step 8 – The data is used by the device / softwareįinally software on the device processes the QR code data as required (such as opening up an URL in a web browsers if opening a QR code on your phone). This stage is where the version, format and timing data are used. Your phone should focus in on the QR code after a brief moment. Once read the error detection and correction algorithms are applied. 1 Tap the Camera app icon, which resembles a black camera on a grey background. Now the data can be read from the QR code, line by line in a zig-zag manner, until all the data is read. Step 7 – The data is read from the QR code Altering the contrast and exposure of the image so that it can be decoded.Warping the image so that any distortion is removed.Rotating the QR code so that it is the correct way up.This is the stage where the position and alignment data is used. The scanner now processes the image, using image recognition and manipulation software. There are basically three ways to be able to read a QR code on a PDF file using a camera phone, upload it on an app, or print and scan it with your laptop camera. Step 6 – The image is processed by the scanner QR Code Desktop Reader will allow you to see the information in a QR code directly on the screen or in an image file. Once the download and installation are complete, open ShareX, and it should run in the Windows system tray. You can see our full ShareX review, as well. The installation process is the same as the installation of every other Windows program. The digital signals are combined into a matrix of digital values, creating a digital version of the QR code. But not many people know that you can also read QR codes from your computer with the free QR Code Desktop Reader application. Download and install ShareX on your Windows computer. Step 5 – The scanner combines the digital data into an image The electrical signals from the cells are passed onto an Analogue to Digital Convertor, which convert the signal into digital form. Step 4 – The electrical signals are converted to digital by the ADC Each cell varies the electrical signals that it outputs depending on the amount of light that hits the cell. The CCD is a 2 dimensional array of millions of photo sensitive cells. The returning light arrives at the scanner lens where the light is focused onto a CCD. Step 3 – The returning light hits the lens in the scanner and is focused onto the surface of a Charge Coupled Device The emitted light hits the image, with the darker parts of the image absorbing more light. CodeTwo QR Code Desktop Reader & Generator is a free tool that will let you quickly scan any QR Code from your screen be it a part of the website, email, banner or a document. A QR code with content type text or URL will show text/URL as a result box. Scan Now How to read the scanned results The scanned results are usually easy to understand. The scanning results will pop up in the results tab. Step 2 – The light hits the image and then bounces back Now show and align your QR code into the scanner frame. On some devices this is done using an infrared light, however if you are scanning a QR code using your smartphone then it may use the in-built flash, or simply rely on ambient light. The first step in the process is where the QR code is illuminated.
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