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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.
Download QR code; Print/export Download as PDF; Printable version; Appearance. move to sidebar hide. From Wikipedia, the free encyclopedia ... Redirect to: Code word ...
If used as a binary code (which it usually is), the dimensions refer to the length of the codeword as defined above. The theory of coding uses the N -dimensional sphere model. For example, how many pennies can be packed into a circle on a tabletop or in 3 dimensions, how many marbles can be packed into a globe.
For a fixed length n, the Hamming distance is a metric on the set of the words of length n (also known as a Hamming space ), as it fulfills the conditions of non-negativity, symmetry, the Hamming distance of two words is 0 if and only if the two words are identical, and it satisfies the triangle inequality as well: [ 2] Indeed, if we fix three ...
Code word, an element of a codebook designed so that the meaning of the code word is opaque without the code book Code name , a clandestine name or cryptonym used to identify sensitive information password , passcode, codeword, countersign; a word that is a special code for access, to pass a challenge of a sentry
In computer vision, the bag-of-words model (BoW model) sometimes called bag-of-visual-words model [1] [2] can be applied to image classification or retrieval, by treating image features as words. In document classification, a bag of words is a sparse vector of occurrence counts of words; that is, a sparse histogram over the vocabulary.
A code over an alphabet Q of size |Q| = q is called q-ary R-covering code of length n if for every word there is a codeword such that the Hamming distance (,). In other words, the spheres (or balls or rook-domains) of radius R with respect to the Hamming metric around the codewords of C have to exhaust the finite metric space Q n {\displaystyle ...