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Hadeer tawfik


Arab academy for science and technology

Active since 2016

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Question


why to use squared energy and mean amplitude as features of gabor filters?
I was reading a paper about using gabor filters for feature extraction, and the author mentioned that he represented the gabor ...

8 years ago | 0 answers | 0

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answers

Question


Is there a way to plot a confusion matrix of the cross validation results?
Can somebody tell me how to plot a confusion matrix of the crossval result? CVMdl = crossval(classifier,'HoldOut',0.08); ...

8 years ago | 2 answers | 1

2

answers

Question


why do I have different results when i reuse the generated code from the classification learner app ?
Hello, I need some guide on how to reuse the generated code because it seems that i am making a mistake. I have used an input o...

8 years ago | 0 answers | 0

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answers

Question


how to do cross validation for multi svm classification ?
I am totally confused about how to do cross validation for this multisvm code,I have tried the crossval function but it is not w...

8 years ago | 0 answers | 0

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Answered
can somebody help me to generate a confusion matrix for this multisvm code?
confMat = confusionmat(Train_Label, results)

8 years ago | 0

| accepted

Question


can somebody help me to generate a confusion matrix for this multisvm code?
I have been trying to plot a confusion matrix for this svm code but im reaching nowhere,so the purpose of my code is to classif...

8 years ago | 1 answer | 0

1

answer

Question


can someone help me with this svmtrain's error "Error using svmtrain ,TRAINING must be a numeric matrix"?
I am trying to figure out why i am seeing this error but i am stuck, here is the code: [X,T] = catadataset; xdata = X; ...

8 years ago | 0 answers | 0

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Question


what does this error mean?"Array formation and parentheses-style indexing with objects of class 'matlab.io.datastore.ImageDatastore' is not allowed"
Can someone help me to understand this error please and how to fix it? I am having a dataset of 83 images, It is divided into 5...

8 years ago | 2 answers | 0

2

answers

Question


why i am having 'Training data for an autoencoder must either be a matrix, or a cell array of equal size images.' error though my images have the same size?
my feature vector file is csvlistdnewtarget.mat and it is a 1x83 feature vector of 83 images, all of the 83 images have the same...

8 years ago | 0 answers | 0

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Question


I can't load my own dataset!
I am having a feature vector of 1X83 and a target matrix of 5X83 and both of them are in .mat format i wanted to creat a datas...

8 years ago | 2 answers | 1

2

answers

Question


Is this the correct way to prepare the input and target vectors to feed them to neural network?
I am having a dataset of 50 images, i extracted the features of the 50 images and stored them as vectors in a matrix using the C...

8 years ago | 0 answers | 0

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answers

Question


what would be the right feature extraction methods for these images?
I am trying to classify cataract images, First i crop out the pupil area and save it in another folder, then i execute the wavel...

8 years ago | 0 answers | 0

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answers

Question


why I am having this "Cell contents assignment to a non-cell array object."error?
I am trying to store Approximation vector of every image in a CSV file , so that every column or every row in the CSV file repre...

8 years ago | 1 answer | 0

1

answer

Question


why haart2 function isn't found in matlab ?
I am trying to use haart2 in matlab , but everytime it shows me this error Undefined function or variable 'haart2'. ...

8 years ago | 2 answers | 0

2

answers

Question


what is wrong with the blockproc function in my code?
I am trying to write the function 'replace' that accesses every block in the image, keeps the first 2000 cooefficient and sets t...

8 years ago | 1 answer | 0

1

answer

Question


How to remove the high frequency DCT coefficients without losing the image dimensions ?
Im in stuck in this part of my code, after applying the DCT on the image, I set the coefficients that have energy lower than 5...

8 years ago | 0 answers | 0

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Question


how to choose the n' coefficients of DCT function applied on JPG image?
1) DCT 2) Quantization 3) Compression (zig-zag style like JPEGs). Does the dct2 function perform all of these functions aut...

8 years ago | 1 answer | 0

1

answer

Question


why does my colorbar look like this?
why does The colorbar looks gray all the time and matlab gives me this warning ?: Warning: Error updating ColorBar. While se...

8 years ago | 1 answer | 0

1

answer

Question


How to use DCT to create feature vectors for neural networks?
I want to use DCT to create feature vectors for gray images and then use it for pattern recognition using neural network. Is th...

8 years ago | 1 answer | 0

1

answer

Question


how to domenstrate the name of the classes which the images belong to after testing the neural network with real world data?
Hello,I have been working with neural network tool box to classify images of cataract and non cataract eye images.I have created...

8 years ago | 1 answer | 0

1

answer