pca boxes

Using system;Using system. Collections. Generic;Using system. text;Using system. runtime. interopservices;Using system. diagnostics;Using system. xml. serialization;Using system. xml;Using system. runtime. serialization;Using emgu. cv. structure; Namespace emgu. CV{/// /// An object recognizer Using PCA (principle components analysis)/// [Serializable]Public class eigenobjectrecognizer{Private image Private image Private matrix Private string [] _ l

Dimensions n> Number of samples m of the matrix in face recognition. Calculate the principal component of matrix A. According to the principle of PCA, it is to calculate the feature values and feature vectors of the covariance matrix a' A of A, But A' A may be relatively large, therefore, according to the size of a' A, the feature values of A' or A' A can be calculated. The feature values of the original Matrix and Its transpose matrix are the same

MATLAB code, sub-functionfunction [A_hat e_hat] =RPCA (res)%res, input image, output is low rank a_hat and sparse e_hat[row col] = size (res); Lambda = 1/sqrt (max (Size (res))); Tol = 1e-7; Maxiter = 1000;% Initializey = res; [U,s,v]=svd (y); norm_two=s (1); Norm_inf=max (abs (Y (:)))/lambda;dual_norm = Max (Norm_two, Norm_inf); Y = Y/dual_norm; A_hat = zeros (row, col); E_hat = zeros (row, col); mu = 0.01/norm_two; % this one can be Tunedmu_bar = mu * 1e7;rho = 1.9; % this one can

PCA reduction by the maximum variance method (Welcome discussion)On the basis of the previous article, we will continue to discuss:First, the center point of the original space is obtained:Assuming that U1 is a projection vector, the variance after the projection is:The variance is the largest (i.e., the points after the projection are scattered and have no correlation.) To achieve a good dimensionality reduction effect), using Lagrange multiplier met

deviation the squared variance = eigenvalues#----Proportion of Variance variance contribution rate#----Cumulative Proportion Variance Cumulative contribution rateThe cumulative contribution rate of the first two principal components of the #由结果显示 has reached 96% and the other two principal components can be reduced to achieve dimensionality reduction.So you can get the function expression z1=-0.497x ' 1-0.515x ' 2-0.481x ' 3-0.507x ' 4z2= 0.543X ' 1-0.210x ' 2-0.725x ' 3-0.368x ' 4#4. Plot the

Defined The idea of PCA is to map n-dimensional features to K-Dimensions (K- background In the machine learning process, the first step is the data processing. In most machine learning classes, in order to simplify understanding, the first few lessons are to select only 1~2 features. This leads to problems, if the characteristics of more than what to do. In the analysis of regression problems, the gradient descent method is introduced, which is esta

In the end, how high is the height of this line-height line:In the inline box model, there is a line boxes, this thing is invisible, the work of this thing is wrapped in every word. A line of text boxes. For example, "Iverson retired" The 5 words, if they are displayed in a row, you Iverson again, sorry, only a line boxes cover you; but "Chun Brother pure Man" 5

[Probability] m balls are thrown into n boxes, and n balls are placed in m boxes.Problem description There are m balls, which should be thrown into n boxes. Each ball is independent of each other. Q: How many boxes have balls on average?Problem Analysis This type of question is purely a mathematical question. Of course, you can use a computer to find the answer a

Using the DOM to set up a text box 1. Control the number of characters entered by the userFor single-line text boxes and password entry boxes, you can use the MaxLength property to control the number of characters entered by the user.For multiline text, MaxLength is a custom attribute with the maximum number of characters entered, and the onkeypress returns the LessThan () function return value when the eve

Code instance for simulating and beautifying checkbox check boxes and checkbox check boxes Code example for simulating and beautifying the checkbox check box:This section describes how to simulate and implement the checkbox check box through code examples.Because the built-in check box function is not beautiful enough, we will introduce it through code examples below.The code example is as follows: The abo

JQuery supports full and inverse selection of check boxes. jquery Selects all check boxes. Jquery code $ (Function () {// select all or none $ ("# all "). click (function () {if (this. checked) {$ ("# list: checkbox "). prop ("checked", true);} else {$ ("# list: checkbox "). prop ("checked", false) ;}}); // select $ ("# selectAll "). click (function () {$ ("# list: checkbox, # all "). prop ("checked", true

Three Common IOS bullet boxes and three ios bullet boxesSo far, three types of IOS pop-up boxes have been known: 1. System pop-up box-bottom pop-up box UIActionSheet (1) usage: handling users' very dangerous operations, such as canceling the system (2) example: UIActionSheet * sheet = [[UIActionSheet alloc] initWithTitle: @ "are you sure you want to log out? "Delegate: self cancelButtonTitle: @" cancel "des

Css implements custom single-choice or check boxes, css single-choice or check boxes/* Radio css single sequence */. hidden-input {opacity: 0; position: absolute; z-index:-1;} input [type = radio] + span {/* your style goes here */display: inline-block; height: 1.5em; width: 1.5em; border-radius: 50%; background-color: # ddd ;} /* active style goes here */input [type = radio]: checked + span {background-col

The explanation for each statement is placed in the function comment!A preliminary study of QT Program, window and button creation and correlationApplication abstract Class #includeOperation Result:Note: don't forget to add the following code to the pro file:QT + = Widgets GUI2 When the line input box and its input message prompt function and its input password when the exception input function#include Run Result: There is an input box in the interface.3 Setting the position and size of the butt

1. Basic syntaxInput, you can also add checked= "checked" to indicate the default check value2. Precautions:In the Radio box, to ensure that the name of each option is the same value, to achieve the single selection effect.However, in the check box, the name is not the same as the multi-select effect1 formname= "Test"Mathod= "POST"Action= "Http://www.baidu.com">2Do you like to travel?BR/>3 inputtype= "ratio"name= "Love"value= "1"checked= "Checked">like4 inputtype= "ratio"name= "Love"value= "2" >

Many times I would like to use the browser default radio button or check box, such as lazy or bad mood when ╮ (╯﹏╰) ╭,In the HTML structure I would like to implement the radio button next to the text clicked and then select or vice versa, like this:The HTML code can be written like this: Then the question came, if it is more than one option, I would like to click on an option, the other is not selected by default, how to write, copy the above code paste a few lines changed the text on the line,

(){ if($( This). Prop (' checked ') ) {$ ("[Name= ' Fruit ']"). each (function(){ $( This). Prop (' checked ',true); }); }Else{$ ("[Name= ' Fruit ']"). each (function(){$( This). Prop (' checked ',false);}); } });2. Disable checkboxtrue }); #or $ (true });3. Set the selected $ ("Input[name= ' Fruit '][value=3]"). Prop ("Checked", ' checked '); $ ("input[name= ' Fruit '][value=3]"). Prop ("Checked", "'); $ (true4. Get the selected value $

Jquery-based code for editable drop-down boxes and jquery drop-down boxes The principle is to add a ul simulated drop-down box to a textbox and use font to simulate a drop-down button. I. create static results First use css and html to make a proper look. Here these two fonts are used and can be created on the icomoon website. The advantage of using a font is that it is convenient to locate the font with th

EditText Editable text BoxTextview text box android:min/maxlines min/large number of linesAndroid:singleline= "true" setting does not break lineAndroid:setellipsize to omit the class capacity over lengthAndroid:textsize= "20dip" Font sizeAndroid:textcolor = "#ff8c00"Android:maxlength= "10" Maximum length is 10Android:gravity= Center Control contentAndroid:layout_gravity= the center control itselfAndroid:hint: Prompt to enter contentandroid:textscalex= "1.5" to set word spacingAndroid:textstyle T

ASP. NET -- Implement Dynamic Interaction between two drop-down boxes and asp.net drop-down boxes Introduction: We often encounter problems on webpages. First, select the province in the drop-down box. Then, the second drop-down box will automatically load the city in the province. This design greatly facilitates user search. How is this implemented? 1. Create a database "Province" table City table 2.