<P> Popular video games, such as Fez and The Talos Principle, have incorporated QR codes as story and / or gameplay elements . </P> <P> Unlike the older, one - dimensional barcodes that were designed to be mechanically scanned by a narrow beam of light, a QR code is detected by a 2 - dimensional digital image sensor and then digitally analyzed by a programmed processor . The processor locates the three distinctive squares at the corners of the QR code image, using a smaller square (or multiple squares) near the fourth corner to normalize the image for size, orientation, and angle of viewing . The small dots throughout the QR code are then converted to binary numbers and validated with an error - correcting algorithm . </P> <P> The amount of data that can be stored in the QR code symbol depends on the datatype (mode, or input character set), version (1,..., 40, indicating the overall dimensions of the symbol), and error correction level . The maximum storage capacities occur for 40 - L symbols (version 40, error correction level L): </P> <Table> Maximum character storage capacity (40 - L) character refers to individual values of the input mode / datatype <Tr> <Th> Input mode </Th> <Th> Max . characters </Th> <Th> Bits / char . </Th> <Th> Possible characters, default encoding </Th> </Tr> <Tr> <Th> Numeric only </Th> <Td> 7,089 </Td> <Td> 31⁄3 </Td> <Td> 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 </Td> </Tr> <Tr> <Th> Alphanumeric </Th> <Td> 4,296 </Td> <Td> 51⁄2 </Td> <Td> 0--9, A--Z (upper - case only), space, $,%, *, +, -, ., /,: </Td> </Tr> <Tr> <Th> Binary / byte </Th> <Td> 2,953 </Td> <Td> 8 </Td> <Td> ISO 8859 - 1 </Td> </Tr> <Tr> <Th> Kanji / kana </Th> <Td> 1,817 </Td> <Td> 13 </Td> <Td> Shift JIS X 0208 </Td> </Tr> </Table>

How much data can you fit in a qr code
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