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  2. Wikipedia:WikiProject QRpedia/user guide - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:WikiProject...

    Click on the QR code image and save it. Import the QR code image into a word processor programme or graphics package. (Optionally) Add text labels. Print. Print the code a minimum of 1 inch (2.5 cm) across, where possible 2 inches (5 cm). Alternatively, open the downloaded images in a program that can print several images at once, as thumbnails ...

  3. QR code - Wikipedia

    en.wikipedia.org/wiki/QR_Code

    The QR code system was invented in 1994, at the Denso Wave automotive products company, in Japan. [5] [6] [7] The initial alternating-square design presented by the team of researchers, headed by Masahiro Hara, was influenced by the black counters and the white counters played on a Go board; [8] the pattern of position detection was found and determined by applying the least-used ratio (1:1:3 ...

  4. Reed–Solomon error correction - Wikipedia

    en.wikipedia.org/wiki/Reed–Solomon_error...

    The first element of a CIRC decoder is a relatively weak inner (32,28) Reed–Solomon code, shortened from a (255,251) code with 8-bit symbols. This code can correct up to 2 byte errors per 32-byte block. More importantly, it flags as erasures any uncorrectable blocks, i.e., blocks with more than 2 byte errors.

  5. World file - Wikipedia

    en.wikipedia.org/wiki/World_file

    Definition. Graphical view of world files parameters and computed values of the four first upper left pixels of an image. The generic meaning of the six parameters in a world file (as defined by Esri [ 1]) is: Line 1: A: pixel size in the x -direction in map units/pixel. Line 2: D: rotation about y -axis.

  6. Lempel–Ziv–Welch - Wikipedia

    en.wikipedia.org/wiki/Lempel–Ziv–Welch

    For such a reduced alphabet, the full 12-bit codes yielded poor compression unless the image was large, so the idea of a variable-width code was introduced: codes typically start one bit wider than the symbols being encoded, and as each code size is used up, the code width increases by 1 bit, up to some prescribed maximum (typically 12 bits ...

  7. Word (computer architecture) - Wikipedia

    en.wikipedia.org/wiki/Word_(computer_architecture)

    In computing, a word is the natural unit of data used by a particular processor design. A word is a fixed-sized datum handled as a unit by the instruction set or the hardware of the processor. The number of bits or digits [ a ] in a word (the word size, word width, or word length) is an important characteristic of any specific processor design ...

  8. PDF417 - Wikipedia

    en.wikipedia.org/wiki/PDF417

    PDF417 is a stacked linear barcode format used in a variety of applications such as transport, identification cards, and inventory management. "PDF" stands for Portable Data File. The "417" signifies that each pattern in the code consists of 4 bars and spaces in a pattern that is 17 units (modules) long.

  9. Help:Pictures - Wikipedia

    en.wikipedia.org/wiki/Help:Pictures

    For guidance on the syntax for doing this, see Help:Infobox picture. In very brief summary, one hurdle that trips up many people when attempting to add an image to an infobox template is that most internally provide the wiki code that "wraps" the image. Accordingly, you do not usually add the brackets, number of pixels, and other code details ...

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