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Awarded to Newman on 09 Oct 2019
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Feeds
Question
How to use radon transform to find face image's orientation?
Is it possible to find out the orientation of a face by applying radon transform I mean to tell whether a face is looking fronta...
7 years ago | 1 answer | 0
1
answerQuestion
scatter plot of neural network
hello i want to plot my neural network out of patternent function <</matlabcentral/answers/uploaded_files/76699/1.png>> to...
7 years ago | 0 answers | 0
0
answersQuestion
scatter plot of first n principal components
Hello, I know how to plot a scatter plot of the first 2 principal components. Can someone tell me how to expand the scatter plot...
7 years ago | 1 answer | 0
1
answerQuestion
how to plot roc for multiclass problems ?
Hi I have been using plot roc function in the neural network.But that function plots roc per class in the classification tasks. ...
7 years ago | 0 answers | 0
0
answersQuestion
3d surface plot
Hello I wan to plot a surface plot like the image given below. The plot must have recognition rate from 0-100 in the z axis . Hi...
7 years ago | 0 answers | 0
0
answersQuestion
Local mean and variance of an image for normalisation
Hello i want to normalise my image of size 112x98 using a concept of local mean and local variance.I wan to first convert my ima...
7 years ago | 1 answer | 0
1
answerQuestion
neural network input error
Hello I want to train my neural network multiple times and track the validation set error. For the following i am doing this:...
8 years ago | 1 answer | 0
1
answerQuestion
Eigen faces for face recognition
Hi I want to do face recognition or classification using the eigenface method. I am using the neural network as a classifier . ...
8 years ago | 0 answers | 0
0
answersQuestion
Using sequentialfs to maximise mutual information for feature selection
I want to maximise mutual information (objective function) <</matlabcentral/answers/uploaded_files/60785/1.png>> ...
8 years ago | 0 answers | 0
0
answersQuestion
plotting CLASSIFICATION confusion matrix
Hello I want to plot the classification confusion matrix, from the output variables as obtaind from the defualt matlab function ...
8 years ago | 0 answers | 0
0
answersQuestion
How to get validation test and training errors of a neural network?
I have created and trained a neural network using the following code .I want to know how to get the training testing and validat...
8 years ago | 2 answers | 1
2
answersQuestion
is it possible to change the input to the bais of a neural network?
I have recently found out that through functions like getwb and setwb we can extract and also set to a new network the weights ...
8 years ago | 1 answer | 0
1
answerQuestion
how to store weights after neural network training ?
hello after I have trained my neural netowrk completely using the gui and tested its performance through error in the testing an...
8 years ago | 1 answer | 0
1
answerQuestion
how does matlab splits the data set into 3 sets for nnet ?
Hello The default function for mat lab nn toolbox is diverand which can also be seen in the GUI of nnstart. It splits the data s...
8 years ago | 1 answer | 0
1
answerQuestion
problem using pca eigenfaces
Hello I am doing a face recognition using pca and eigenfaces using a neural network. this is my code here m is a 10344x...
8 years ago | 0 answers | 0
0
answersQuestion
is my neural network properly trained ?
Hello i have a feature vector of 12455x400 matrix and out put target of 40x400 matrix .I am training using patternent and fucnti...
8 years ago | 1 answer | 0
1
answerQuestion
concatenate all cells in a celll array
hello i have a cell array 7x7 Columns 1 through 6 [256x1 double] [256x1 double] [256x1 double] [256x1 double...
8 years ago | 2 answers | 0
2
answersQuestion
how to assign weights to specific blocks of an image?
I want to perform face recongition using LBP feautres.In th eoriginal paper it is mentioned that some regions have mre informat...
8 years ago | 0 answers | 0
0
answersQuestion
improve pattern recognition by neural netowrk
hello i have a feature vector localbinary pattern histogram as Nx400 or 400 samples .I have normalised each of the columns of th...
8 years ago | 0 answers | 0
0
answersQuestion
is it important to normalise the input to a neural network before training
I have a feature vector of the size 10000x400(400 samples) and target matrix is 40x400(40 classes).The input feature vecotr for ...
8 years ago | 2 answers | 0
2
answersQuestion
how to concatenate structure fields
Hello I have a structure s(i).f(j).d where i=1:40 and j=1:10.I want to concantenate all the fields in to one single matrix. for ...
8 years ago | 2 answers | 0
2
answersQuestion
how to create a matrix of concatenated images
Hello i have 40 subfolders in a folder .each folder contains 10 images of a particular individual.I have created a image set of ...
8 years ago | 0 answers | 0
0
answersQuestion
howto divide an image into K*K windows for LBP
hello I have an image which is 112 x 92. I want to divide the image into 7x7 blocks and apply generate LBP pattern for each bloc...
8 years ago | 0 answers | 0
0
answersQuestion
How to train a neural network with genetic algorithm and back propagation?
Hello I want to train my neural network using a hybrid model of backpropagation and Genetic algorithm . Is it possible to use ...
8 years ago | 1 answer | 0
1
answerQuestion
how to train a bag of words for pattern recognition problems in neural network
hello I am using bag of words concept to encode images as 500 visual words to represent as feature vector. I was partitioning...
8 years ago | 1 answer | 0
1
answerQuestion
dir returning different values
Hello I have a flder in which there are 40 subfolders=[s1 s2...s40]. But when I am wrting dir in the folder location in the comm...
8 years ago | 1 answer | 0
1
answerQuestion
how to loop through subfolders and apply a particular function
Hello I have 40 subfolders in folder.And each of these subfolder contrains 10 images in pgm format. Suppose I want to aply norma...
8 years ago | 2 answers | 0
2
answersQuestion
normalise all images in an imageset
Hello I want to normalise all the images in an image set using standard deviation and zero mean. for that i ma using my normalis...
8 years ago | 1 answer | 0
1
answerQuestion
improve accuracy in pattern recognition using neural network
Hello I am trying to build a face recognition system using neural network. For that I am using SURF features as a feature vector...
8 years ago | 0 answers | 0
0
answersQuestion
how to display a montage of images from a dataset
Hello I am using the AT&T standard database for face recognition. I want to display a montage of just a particular face of one i...
8 years ago | 1 answer | 0
1
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