Because I read Xin Zou Teacher's "construction Method: Modern Software Engineering (second edition)", so the Agile software development has a relatively large interest. So I found some papers on the Internet, such as requirements Engineering and agile Software Development, A decade of Agile Methodologies:towards Explainin G Agile software Development. After reading these papers, we have a general understanding of agile software development. This blog post is mainly about Agile software developme
A detailed analysis of the matching algorithm of scale invariant feature transformScale invariant Feature Transform (SIFT)Just for FunZdd[email protected]or ([email protected])For starters, from David G.lowe's thesis to implementation, there are many gaps in this article to help you across.If you study Sifi to do the search, perhaps Opensse is more suitable for you, welcome to use.1. Sift OverviewScale invariant feature conversion (Scale-invariant feature transform or SIFT) is a computer vision
SATA interface with the hard drive is also called serial hard disk, is the future of PC hard drive trend. SATA's biggest advantage is the high transmission rate. At present, mainstream solid-state drives are generally upgraded to SATA3.0 interfaces, the corresponding motherboard or notebook SATA interface has been popularized 3.0 specifications, while some old motherboards or notebooks are still more in the SATA2.0 era, then, the same is a SATA3.0 solid-state hard disk, SATA2 and SATA3 interface
The Code has been open-source to GitHub, https://github.com/alibaba/simpleimageproject, in which the analyze module is located.
Original Image:
Main call method:
BufferedImage img = ImageIO.read(logoFile); RenderImage ri = new RenderImage(img); SIFT sift = new SIFT(); sift.detectFeatures(ri.toPixelFloatArray(null)); List
You can also read another graph to get another list
List
First, from the above call entry, we will exp
Internet of things "strong centrality" and "intelligent control" mode, has emerged in the smart home scene: On the one hand through the mobile phone collection and analysis from smart home and smart home appliances and other equipment data, on the other hand, based on the results of data analysis and reverse control of smart home and intelligent home appliances and other equipment, to optimize the family environment. The business model of "extreme i
Transferred from: http://blog.csdn.net/zddmail/article/details/7521424
The original learning sift time, I think this article is worthy of detailed explanation of the two words, special turn. A detailed analysis of the matching algorithm of scale invariant feature transformScale invariant Feature Transform (SIFT)Just for Fun
zdd zddmail@gmail.com
For starters, from David G.lowe's thesis to implementation, there are many gaps in this article to help you across.
1. Sift Overview
Scale invariant fe
used in the third layer to improve the performance. However, the rise of the next generation of ASIC-based ultra-high-speed L2/L3 switches/router systems, such as the Extreme Networks Black Diamond Series, has surpassed the speed advantage of the traditional L2 switching system, eliminate the focus of MPLS to solve the speed problem. But as a technology to implement new routing functions, MPLS protocol is still very important. MPLS enables or enhance
of a Super control center in any segment of the solution. IoT will change the Internet model from ' runaway ' to ' smart control '. "Zhang Jianning the first public share of his important insights into the internet of things over the past 7 years.The Internet of things "strong centrality" and "intelligent control" mode, has emerged in the smart home scene: On the one hand through the mobile phone collection and analysis from smart home and smart home appliances and other equipment data, on the
besell function by 47611.5.6 [instance 65] evaluate the modified besell function by 47711.6 Carlson elliptical points 47911.6.1 [algorithm 113] First Class elliptical integral 47911.6.2 [algorithm 114] degradation form of first class elliptical integral 48111.6.3 [algorithm 115] Class 2 elliptical integral 48311.6.4 [algorithm 116] Third Class elliptical integral 48611.6.5 [instance 66] evaluate the integral value of the first-class leap elliptic function by 49011.6.6 [instance 67] evaluate the
used in the third layer to improve the performance. However, the rise of the next generation of ASIC-based ultra-high-speed L2/L3 switches/router systems, such as the Extreme Networks Black Diamond Series, has surpassed the speed advantage of the traditional L2 switching system, eliminate the focus of MPLS to solve the speed problem. But as a technology to implement new routing functions, MPLS protocol is still very important. MPLS enables or enhance
Someone on Weibo recently voted for the paper, which has benefited the most. Many people say it is Lowe's article about sift. Indeed, in the field of image feature recognition, the emergence of Sift is of great significance. With its stable existence, high discrimination promotes the development of many fields, such as recognition and registration. In the previous article, we analyzed the construction of Gaussian pyramid, the first step of Sift feature extraction, and analyzed in detail how Gaus
frequency of occurrence, which is called the weighted mean value =∑xw/n;
Although the mean is the most useful statistic to describe the center trend of a dataset, it is not always the best way to measure the datacenter, because the mean is sensitive to extreme values (outliers). To counteract the effects of a few extreme values, we can use the intercept mean, which means the mean value after dropping the
Author: Wang Xianrong
This article attempts to translate the paper nonparametric background generation recommended in learning opencv. Due to my poor English skills, I had to work on and off for a few days. There must be many mistakes in it. please correct me and forgive me. The purpose of this article is to study. If you want to use it for commercial purposes, contact the author of the original article.
Non-parameter background generationLiu Asia, Yao Hongxun, Gao Wen, Chen Xilin, Zhao Debi
in the third layer to improve the performance. However, the rise of the next generation of ASIC-based ultra-high-speed L2/L3 switches/router systems, such as the Extreme Networks Black Diamond Series, has surpassed the speed advantage of the traditional L2 switching system, eliminate the focus of MPLS to solve the speed problem. But as a technology to implement new routing functions, MPLS protocol is still very important. MPLS enables or enhances VPN
theorems can be observed from Geometric Intuition and extracted. Finally, they are strictly proved to rise to the theorem. for example, considering the ferma's theorem, the derivative value at the extreme point of the function can be 0. intuitively, the tangent of a derivative function at the extreme point should be horizontal, and it does not necessarily require continuous function. Then our conjecture is
players-I7 is a 4-core support for Hyper-threading-high-end gamersAnd the strong low-end CPU, ordinary players can also use, such as-E3 is a 4-core support for Hyper-threading-high-end gamersOf course, the Perverted i7 extreme can reach 6 core 12 threads, 8 cores 16 threads, but generally are bought by enthusiasts, not common among ordinary players.Some of the introduction of the E3, in fact, the scheme is basically the use of i7, such as the highly
differential image, then find the 2nd layer to the S+1 layer.While each Gaussian differential image $g (X,Y,\SIGMA) $ requires two images of scale space "(X,Y,K\SIGMA) $ with" (X,Y,\SIGMA) $ for differential generation, where S = 3 is assumed, then we need a Gaussian differential image with s+2 = 5 sheets, respectively $g ( X,y,\sigma), G (X,y,k\sigma), G (X,y,k^2\sigma), G (X,y,k^3\sigma), G (X,y,k^4\sigma) $. One of the $g (X,y,k\sigma), G (X,y,k^2\sigma), G (X,y,k^3\sigma) $ these three imag
Is the sea race (sea color) matrix, search on the internet has.In mathematics, a sea-color matrix is a square matrix of second-order partial derivatives of an independent variable as a real-valued function of a vector.Hessian matrices are second-order partial derivative matrices of multidimensional variable functions, H (I,J) =d^2 (f)/(d (XI) d (XJ))1. Definitions of extreme values (maxima or minima)There is a function defined on the area D RN y=f (x
target function take a step toward the minimum value. We then perform the minimum optimization on the other radians until all the operators meet the kkt condition, and the objective function is minimized and the algorithm ends.
In this way, the SMO algorithm has two problems to solve: one is how to solve the optimization problem of two variables, and the other is how to determine which aspects of the Laplace multiplier are optimized first.
Ii. TwoThe problem of the optimization of the Lapla
this step, basically the establishment of a scale space, sift algorithm for the image of the scale changes have invariance, the reason lies in this scale space, but the scale space is not omnipotent, because in the implementation of the SIFT algorithm, the scale of the scope of space is limited, can only contain most of the scale of the image , but the SIFT can not guarantee the scale invariance of the image features which are far beyond the range. 2 Find the
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