FREAK algorithm is a ICCV 2012 on the feature point detection and matching of the paper "Freak:fast Retina KeyPoint" proposed, from the article title can be seen that the algorithm is characterized by a rapid, Another feature is that the algorithm is inspired by the principle of human eye recognition objects.I've seen
figure G is a two-point figure.Match: A collection of edges without a common point (you can imagine the word marriage).Number of matches: the number of edges in the edge setMaximum match: Match the maximum number of matches.1-1, Show is a two-part diagram: The bold line represents a matching method of the dichotomy, it is not difficult to find that the match is now the maximum match.How can I get a maximum match for a binary graph? Use a simple enume
This article provides the idea and complete code for the Hungarian algorithm to find the maximum matching of a bipartite graph, and gives some comments on several small issues in algorithm learning. First, name the two sides of the Bipartite Graph as side A and side B. A key term for the Hungarian
"The algorithms on the books are often very complex, and I plan to use a humorous example to describe the process of the algorithm."The Hungarian algorithm was proposed by the Hungarian mathematician Edmonds in 1965, hence the name. The Hungarian algorithm is based on the idea of sufficiency proof in Hall theorem, it i
Simple String Matching algorithm descriptionThe most common scenario for a string matching algorithm is to find the specified text from a document. The text you need to find is called a pattern string, and the string from which you want to find the pattern string is called the find string.To better understand the KMP
of finding an augmented path is O (m), which is increased by up to N times, and DFS is more concise in its actual implementation. The basic mode of the Hungarian algorithm: 1, the initial maximum match is empty 2, while (find the augmented path) 3, do Add the augmented path to the maximum match. If the left half of the binary graph has n points, up to n increments, if there are M-bars in the graph, each augmented path iterates through the edges, so
Http://hi.baidu.com/l6834279/item/d6ef651684dda4fcddeecae3
First, briefly describe some basic concepts about the BM algorithm.
The BM algorithm is an exact string matching algorithm (different from fuzzy match ).
The BM algorithm
I. Restatement of the issueThe existing string S1, S1 the part that matches the string S2 exactly, for example:S1 = "ABABAABABC"S2 = "ABABC"Then the result of the match is 5 (the position of "ababc" in S1), of course, if there is more than one S2 in S1 is OK, can find the first one can find the second one.-------The easiest way to think of the method is naturally double-loop bitwise alignment (BF algorithm), but in the worst case the time complexity o
the running time and memory usage of several submitted programs:
ID
Date
Author
Problem
Language
JudgementResult
ExecutionTime
MemoryUsed
2612947
19:52:41 20 May 2009
Skyivben
1102
C ++
Accepted
0.062
121 KB
2612930
19:44:58 20 May 2009
Skyivben
1102
C #
Accepted
0.125
10 561 KB
2612807
17:17:31 20 May 2009
Skyivben
1102
C #
Accepted
0.718
Article Starter: http://pjf.name/post-122.html
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First of all, D.e.knuth,j.h.morris and V.r.pratt, the three old-timers salute, invented this efficient al
The so-called dichotomy chart: refers to the same part without edges, then this graph is a binary graph.Note: The following transfer from http://blog.csdn.net/dark_scope/article/details/8880547The Hungarian algorithm was proposed by the Hungarian mathematician Edmonds in 1965, hence the name. The Hungarian algorithm is based on the idea of sufficiency proof in Ha
think of, as mentioned earlier, encountering new characters, and using the auxiliary array π to constantly change the state. or record the pseudo-code:Kmp-match (s,p) n The key to the problem, then, is to compute the auxiliary arrayπ, that is, how the state is transferred, Kmp-compute-prefix (P). As mentioned above, the difference with automata is whether the jump is with a new character, review the Automaton State Migration f (q,a) = g (PQA), then the KMP isπ (q) =g (Pq). And here KMP calculat
problem
3 How to locate the results of our search
Next, I'll post the code I implemented.
/** Using KMP algorithm to implement string matching search method* The function of this program is to search the contents of all the files under this directory and whether it is related to the given* String match, if match, output file name: The line containing the
Last blog: Multi-condition greedy Matching Algorithm for SQL like statements.
Directly join the question.
The previous blog only implements multiple keywords "as many matches as possible ".
However, in practical applications, as many matches as possible are not necessarily reasonable.
Take the phrase "how to register a user on a csdn Website" as an example. It is divided into three words: "csd
edges that belong to the matching m, it is said that VI is an open point.Staggered RailSet P is a track of Figure g, if any of P's two adjacent edges must be one of the M and the other does not belong to M, it is called P is staggered rail.Augmented orbit (augmented path)The two endpoints are jagged tracks that are non-covered points, called an augmented orbit.The properties of an augmented orbit:The path length of the 1:p must be odd, and the last e
The Hungarian algorithm solves the binary graph matching"The algorithms in the book are often very complex, and my friends and I plan to use some simple examples to describe the process of the algorithm."The Hungarian algorithm was proposed by the Hungarian mathematician Edmonds in 1965, hence the
= REHASH (y [j], y [j + m], hy );
++ J;
}
}
As we can see, the KR algorithm has an O (m) Complexity preprocessing process, and it always feels that its preprocessing does not reflect the characteristics of the pattern itself, as a result, the search process is still O (Mn) complex, but it is generally not reflected. Search for "aaaaaaaaaaaaaaaaaaaaaaaaa" to find out how slow KR is.In general, the KR alg
It's a la la!KM algorithm by giving each vertex a label (called the top mark) to the problem of maximum weight matchingTo the problem of complete matching. The top mark of the vertex XI is a[i], the top mark of the vertex Yi is b[i], and the Benquan between the Vertex XI and the YJ is w[i,j]. At any point in the algorithm execution, a[i]+b[j]>=w[i,j] is always tr
String Matching-KMP Algorithm
Finite AutomatonA finite automatic machine M is A quintuple (Q, q0, A, Σ, Delta), where:
Q is a set of States,Q0 and Q are in the initial state,A is the word set of Q and A set of acceptance states,Σ is a finite input alphabet,Delta is a function from Q x Σ to Q, called a transfer function.The following defines several related functions:
Phi (w) is the state in which M stops sc
The Hungarian algorithm was proposed by the Hungarian mathematician Edmonds in 1965, hence the name. The Hungarian algorithm is based on the idea of sufficiency proof in Hall theorem, it is the most common algorithm of the part graph matching, and the core of the
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