OpenCV provides four different edge detection operators, or High-pass filters: Sobel,scharr and Laplacian operators and canny operators, the specific detection steps are as follows: image filtering : The algorithm of edge detection is based on first and second derivative of image gray value, but the derivative is usually sensitive to noise, so it is necessary to use filter to improve the performance of nois
To extract the edges in Image Fig1006 (a) (building). tif.
Solution: Using the canny edge detector, the code is as follows:function Canny ()% Canny algorithm written by itself, Chen YuCLCClear all;Close all;Img=imread (' Fig1006 (a) (building). tif ');Figure (1); subplot (221); Imshow (IMG); title (' Original imag
Introduction of Ant colony algorithm, genetic algorithm and simulated annealing algorithm
Exhaustive method
Enumerate all the possibilities and go on to get the best results. As figure one, you need to go straight from point A to point G to know that F is the highest (best solution). The optimal solution obtained by this alg
The string matching algorithm is mainly two kinds, the most basic brute force solution, also is called the naïve algorithm, the other is the KMP algorithm. This article gives the simplest method of two algorithms, easy to remember and write in the interview, of course, the emphasis is still to understand the algorithm
First, the problem description0-1 knapsack problem, part knapsack problem. The DP algorithm of 0-1 knapsack, the greedy algorithm of partial knapsack and DP algorithm are implemented respectively.Second, the principle of the algorithm(1) 0-1-pack DP algorithm0-1 knapsack problem: There are n items and a backpack with a
The essence of the "algorithm path" is the classic algorithm, and the "algorithm path" AlgorithmThe essence of "algorithm path" in the classic algorithm Section
This book is written by Yan hengming, the author has another book, "The string of data structures", and "the phi
We often encounter the shortest path problem, and the shortest path problem solutions are diverse, breadth-first search (BFS), Depth-first search (DFS) and Dijkstra algorithm seems to solve the problem, here is a brief introduction to these algorithms, analysis of their scope of application.
First, the principle analysis:1 Breadth First search (BFS)Breadth-First search relies on queues to solve problems. Each node in the queue needs to contain a recor
I. OverviewNearest Neighbor Rule classification (k-nearest Neighbor) KNN algorithmThe initial proximity algorithm was proposed by cover and Hart in 1968,This is a classification (classification) algorithmInput instance-based learning (instance-based learning), lazy learning (lazy learning)Second, the principle in a sample data set, also known as the training sample set, and each data in the sample set has a label, that is, we know the corresponding r
The Kruskal algorithm (Kruskal's algorithm) is one of the simpler understandings of the two classical minimum spanning tree algorithms. This fully embodies the essence of the greedy algorithm. The approximate process can be represented by a graph. The choice of the map here borrows from Wikipedia. Very clear and intuitive.First step, we have a graph with several
This is a creation in
Article, where the information may have evolved or changed.
Common internal sorting algorithms are: Insert sort, hill sort, select sort, bubble sort, merge sort, quick sort, heap sort, cardinality sort, etc. Summarize with a picture:
Merge sort (English: merge sort, or mergesort) is an efficient sorting algorithm that creates an O (n log n) on a merge operation. It was first presented by John von Neumann in 1945. The
someone asked, why is F (x-1) +1 and 1 compared AH. The reason is simple: take F (2) as an example, F (2) =f (1+1), and f (1) = 1, that is, the result of F (2) is associated with F (1), whereas F (2) itself has an initial value of 1, the final value of F (2) According to the question is supposed to be through F (1) The value of the operation and its initial value select the larger one. And so on in the back.
2, this method is very ingenious, the main idea is this, I don't care what your sequen
Data Structure and algorithm simulation algorithm C ++ implementation, data structure and algorithm AlgorithmSimulation Algorithm: simulates the entire process. By changing the parameters of the model in mathematics, you can observe the changes in the process state caused by these parameters.Algorithm concept: use rand
than 100, so the corresponding questions are generated directly.
The following class implements efficiency considerations in two scenarios. If traversal is fast, you can directly call AddTest to add one more time. If the query is fast, you can use KindOfTestNeed to extract the query conditions, the results generated by the current code are the same each time. If there is a real library, you can use the Randomization of the query results and the Randomization of the KindOfTestNeed condition to g
A history of particle swarm optimization
Particle swarm optimization (Complex Adaptive system,cas) is derived from the complex adaptive system. CAS theory was formally introduced in 1994, and CAS members are called principals. For example, the study of bird systems, in which each bird is called the subject. The subject is adaptable, it can communicate with the environment and other subjects, and change its structure and behavior according to the process of communication "learning" or "accumulati
Reprint Address: http://blog.csdn.net/tianshuai1111/article/details/7674327
First, the Patrol defense algorithm
For_each (container start Address, container end address, method to execute)
[HTML] View plain copy #include
Two, find algorithm
int *find (int *begin,int *end,int value)
In the interval begin,end of the posterior closure, find value if found, return the first qualifying element, otherwise re
Continuation, A*,dijkstra, performance comparison of bidirectional BFS algorithm and application of A * algorithm
Author: July March 10, 2011.Source: Http://blog.csdn.net/v_JULY_v--------------------------------------------------
Introduction:The shortest path algorithm a * algorithm ,Dijkstra
I. The method of exhaustive
Enumerate all the possibilities and go on to get the best results. As figure one, you need to go straight from point A to point G to know that F is the highest (best solution). The optimal solution obtained by this algorithm is certainly the best, but it is also the least efficient. Although the best solution can be obtained by exhaustive method, the efficiency is extremely low. In order to improve efficiency, you can not
Sort Categories
sort by whether in memory
Depending on whether the records to be sorted in the sort process are all placed in memory, the sort is divided into: inner and outer sort.
For internal sorting, the performance of the sorting algorithm is mainly affected by 3 aspects:Time performance, auxiliary space, algorithmic complexity. according to the algorithm to achieve the complexity of classification S
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.