The URL information contained in this QR code is obtained, employing a process opposite to the generation stage. Thus, a QR image carrying information is formed.ĭuring recognition, a user scans a QR image to identify black dots, white dots and their positional relationship. For example, the first binary character in the string can be expressed by the dot in the first row and the first column, while the second binary character in this string can be expressed by the dot in the first row and the second column. ![]() Furthermore, the positional relationship among different dots in a QR image is used to express the sequence relationship among different binary characters. For example, a black dot may express binary “1”, and a white dot express binary “0”. The principle can be described as follows:ĭuring generation, a URL is encoded into a binary string, and each binary character is expressed by a dot in a QR image. ![]() ![]() ![]() Generally, the QR process contains two stages: generation and recognition. QR codes have been used widely and deeply affect people's lifestyles.
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