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Mariem Harmassi


Active since 2012

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Professional Interests: human recognition

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problem when performing PCA on large dataset
Hello every body i am trying to perform PCA on a large dataset 1000*1290240 i heard about iterative PCA : 1-calculate the the ...

mer än 11 år ago | 1 answer | 0

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answer

Question


problem when saving some large variables of the workspace
hello i tried to save some large variables manually but it doesn t work the result is a shortcut , i also tried this command s...

mer än 11 år ago | 1 answer | 0

1

answer

Question


how to convert a double matrix image to a unit8 matrix ?
Hi everybody :) I have an image ,a matrix with values between -0.0934 and 0 and i want to convert it to unit8 matrix with valu...

mer än 11 år ago | 2 answers | 1

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answers

Question


How can i find the position of a subimage in larger image ?
Hello I have a sub-image X ,which is a subimage of Y .How can find the position of this subiamge in the image Y ? Can anyone h...

nästan 12 år ago | 2 answers | 0

2

answers

Question


How to synthetic face images and to reconstruct them only from low-frequency Fourier features ?
Hello everybody I need to reconstruct face images by using only low-frequency Fourier coefficients. So how to keep only the low...

nästan 12 år ago | 1 answer | 0

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Question


How to extract image from a multidimensional matrix ?
I downloaded the USPS database a set of 1100 images per number from 0to9 . USPS is a data 256x1100x10 uint8 matrix , so how can...

nästan 12 år ago | 1 answer | 0

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Question


how to concatenate different cells of a cell array in one cell without a loup ??
this is my cell B B = {1x2 cell} {1x3 cell} How to transorm it into {1x5 cell} ???

ungefär 12 år ago | 1 answer | 0

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Question


which feature extraction use for face recognition ???
I tried PCA a good method it can reduce the number of pixel to the number of input images but if i have a large data base its n...

ungefär 12 år ago | 1 answer | 0

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Question


How can i determine the percentage of noise given the variance of imnoise ??
using the noise function J = imnoise(I,'gaussian',m,v) ,how can i estimate the percentage of noise ????

ungefär 12 år ago | 1 answer | 0

1

answer

Question


error when installing matlab 2012 a on windows 7 64 bits
this is the message error "The following error was detected while installing cgir_hdl_core_win 64". the compatibilty parameter ...

ungefär 12 år ago | 1 answer | 0

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Question


how to initialize the neural network to a set of weights ???
I created my NN with patternet ??

ungefär 12 år ago | 4 answers | 1

4

answers

Question


How can i extend the memory allocated to matlab ??
I nedd to extend the memory how to do this ?? Can someone help me

ungefär 12 år ago | 1 answer | 0

1

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Question


problem with the min function or the 1.8509e+007 ??
Hello everybody I have a vector with three input values so this is how my vector is : F=[ss(60,57) ;ss(13,57) ;ss(14,57)] ...

ungefär 12 år ago | 2 answers | 0

2

answers

Question


How to pass variables to the fintness function in Genetic algorithm?
hello I am testing a Genetic algorithm without using the global optimization toolbox, I have defined the fitness function in a s...

ungefär 12 år ago | 4 answers | 0

4

answers

Question


Output of Neural network ??
i used a backpropagation neural network and i get this output 3.5838e-006 .baut what i need is juts values that lies between 0 ...

ungefär 12 år ago | 1 answer | 0

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Question


how can i preprocess this 7000 jpg image in order to experiment a face recognition software ???
I downloaded a data base of 7000 image each of which is a matrix 196*196*3 matrix .I need to experiment my clastering algorith...

ungefär 12 år ago | 1 answer | 0

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Answered
create an Evolutionary Neural network ???
Can someone help me please ????

ungefär 12 år ago | 0

Question


create an Evolutionary Neural network ???
I need to create an Evolutionary Neural network and i used the function net = patternnet(hn); but i tuned the weights manua...

ungefär 12 år ago | 3 answers | 0

3

answers

Question


How can i MakeNoise to the dataset dataset
I found this code in matlab file D_SUB=MakeNoise(D_SUB, Noise) Does the MakeNoise exist ? It is a matlab function if no ho...

ungefär 12 år ago | 2 answers | 0

2

answers

Question


How can i check if an array cell contain only zero element ?
How can i check if an array cell just contain zero elements ? is there any defined matlab function ?

ungefär 12 år ago | 1 answer | 0

1

answer

Answered
How can i randomly divide a dataset(matrix) into k parts ??
function [idxo prtA]=randDivide(M,K) [n,m]=size(M); np=(n-rem(n,K))/K; B=M; [c,idx]=sort(rand(n,1)); C=M(i...

ungefär 12 år ago | 1

| accepted

Question


How can i randomly divide a dataset(matrix) into k parts ??
I have a database and i want to randomly divide it into ka parts of equal size . if the database has n row each part will conta...

ungefär 12 år ago | 3 answers | 1

3

answers

Answered
I tried to create a neural networks but what's wrong ?
think u for answering i have resolved the problem .and my code can genrate good results . But how can I randomly divide my datas...

ungefär 12 år ago | 0

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Simulate the Neural network ?
Hi , i am testing my modular neural network so First what's the difference between sim and train ? 2-when i call the sim func...

ungefär 12 år ago | 0 answers | 0

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Question


How can i stop the neural network after just one iteration ?
Hi i am a master student and i am developping a matlab code for evolutionary neural network so the training algorithm is done wi...

ungefär 12 år ago | 3 answers | 0

3

answers

Question


I tried to create a neural networks but what's wrong ?
This is the code i tried : net = newff(P,T,S) net = newff(P,T,S,TF,BTF,BLF,PF,IPF,OPF,DDF) Description newff(P,T,S...

ungefär 12 år ago | 4 answers | 0

4

answers

Answered
How can i stop the neural network after just one iteration ?
Hi firstly i want to think you for your help , i used a gentic algorithm as follow [x fval exitflag output population scores] =...

ungefär 12 år ago | 0