منابع مشابه
Approximate String Matching with Ordered q-Grams
Approximate string matching with k differences is considered. Filtration of the text is a widely adopted technique to reduce the text area processed by dynamic programming. We present sublinear filtration algorithms based on the locations of q-grams in the pattern. Samples of q-grams are drawn from the text at fixed periods, and only if consecutive samples appear in the pattern approximately in...
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We develop bit-parallel algorithms for exact string matching. Our algorithms are variations of the BNDM and Shift-Or algorithms. At each alignment the algorithms read a q-gram before testing the state variable. In addition we apply reading a 2-gram in one instruction. Our experiments show that many of the new variations are substantially faster than any previous string matching algorithm on x86...
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Least square matching (LSM) is one of the most accurate image matching methods in photogrammetry and remote sensing. The main disadvantage of the LSM is its high computational complexity due to large size of observation equations. To address this problem, in this paper a novel method, called fast least square matching (FLSM) is being presented. The main idea of the proposed FLSM is decreasing t...
متن کاملParameterized matching with mismatches
The problem of approximate parameterized string searching consists of finding, for a given text t = t1t2 . . . tn and pattern p = p1p2 . . . pm over respective alphabets Σt and Σp , the injection πi from Σp to Σt maximizing the number of matches between πi(p) and ti ti+1 . . . ti+m−1 (i = 1,2, . . . , n −m + 1). We examine the special case where both strings are run-length encoded, and further ...
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We present a new index for approximate string matching. The index collects text q-samples, that is, disjoint text substrings of length q, at fixed intervals and stores their positions. At search time, part of the text is filtered out by noticing that any occurrence of the pattern must be reflected in the presence of some text q-samples that match approximately inside the pattern. Hence the inde...
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ژورنال
عنوان ژورنال: Journal of Discrete Algorithms
سال: 2008
ISSN: 1570-8667
DOI: 10.1016/j.jda.2007.11.001