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Elias Unk


Active since 2017

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Question


How can i normalise my features vector?
I want to test normalizing my features vector in 2 ways. #1 the sum of the entire normalized matrix is 1 #2 the sum of each ...

6 years ago | 0 answers | 0

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answers

Question


Why don't the rank match the weight for a given index?!
[ranks,weights] = relieff(features_mat',Y,10); figure bar(weights(ranks)) disp(weights) disp(ranks) xlabel('Pre...

6 years ago | 1 answer | 0

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Question


How can i change my code to let the name of the feature be in plot instead of the value of the rank?
[ranks,weights] = relieff(features_mat',Y,10); figure bar(weights(ranks))

6 years ago | 1 answer | 0

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Question


How can i visualiize the peeks over the graph?
My code for R peeks extraction: m1=max(ca2)*.40;%to test P=find(ca2>=m1); y_levels=ca2(P); ...

6 years ago | 0 answers | 0

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Question


How can i preprocess heart beat signals to remove the noise?
I want to pre-process heartbeats ECG like baseline wander, power line interference and high frequency noise i did read some sch...

6 years ago | 1 answer | 0

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Question


how can i increase the number of my data?
Basically, i have a 1x200 .mat file, the 200 are the xs (from 0 to 200) and each x has a corresponding y value. The thing i...

6 years ago | 1 answer | 0

1

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Question


How can i add a main line and main column for my table?
my table : 'L1' 'B' 'L2' 'B' 'L3' 'A' 'L4' 'C' 'L5' 'B' 'L6' 'C' 'L7' 'C' 'L8' ...

6 years ago | 1 answer | 0

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Question


How can i create many tables of the main one and store them?
my_table = readtable('some.csv') 'L1' 'B' 'L2' 'B' 'L3' 'A' 'L4' 'C' 'L5' 'B' ...

6 years ago | 1 answer | 0

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Question


How to 'cat' my dataset?
I have .mat files in a folder, each of them is the same size 1x500, what i want to do is to create a table where the first eleme...

6 years ago | 1 answer | 0

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Question


How do i read all the files in a folder?
i want something like: folder = path_to_folder an For element in folder: print(element) where i get al...

6 years ago | 1 answer | 1

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Question


How can i make this code snippet a function?
data1 = load('data1.mat') data2 = load('data2.mat') data3 = load('data3.mat') data4 = load('data4.mat') full_v...

6 years ago | 1 answer | 0

1

answer

Question


How can i get the data from a website?
Let's assume the website's URL is www.something.com that website has file (or folder where i want the files inside), the content...

6 years ago | 2 answers | 0

2

answers

Question


How do i know to which graph i'm plotting?
data1 = load('data1.mat') data2 = load('data2.mat') by doing `plot(val(1, :))` i have a graph but I don't know if it corre...

6 years ago | 3 answers | 0

3

answers

Question


How to read the text of an image?
Trying to set a text reading algorithm.It should be able to read the words and numbers (handwriting excluded), however, the text...

7 years ago | 0 answers | 0

0

answers

Question


How to calculate the area of an input image?
I want to calculate the area of the FULL binary image the user inputs is it as simple as heightXwidth if so what function does i...

7 years ago | 3 answers | 0

3

answers

Question


How to find the value of the pixel with highest value in an image?
Trying to replicate this step :" *B. Maximum Intensity: This is done by finding maximum intensity in gray-scale image by maximiz...

7 years ago | 1 answer | 0

1

answer

Question


How can i visualize an exact column or row only of a matrix?
let's say i have a 50 by 70 matrix and i want all the values of the column number 29, how can i do that.

7 years ago | 2 answers | 0

2

answers

Question


Why is my centroid giving only 1 element per blob using region props?
they should be 2 per blob x and y elements

7 years ago | 1 answer | 0

1

answer

Question


How to calculate the mean and standard deviation of a ROI(Region of interest) excluding the black background
I need to calculate numerous color and texture features of a region of interest in an image excluding the black background,the c...

7 years ago | 1 answer | 1

1

answer

Question


how to better improve my segmentation at the edges to get an image similar to the lesion
As the title says and can be seen in the attached images,i'd like to improve the edges in the segmented pic and that can be done...

7 years ago | 1 answer | 0

1

answer

Question


What's the best color model to extract texture features from?
Just like L*a*b is the best color model to extract color features from images because it matches human color perspective,what is...

7 years ago | 1 answer | 0

1

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Question


IS there an alternative way to store data in matlab other than .mat?
The kind of data i'll be saving is a type double matrix of around 120 lines and columns and prefferrably i'll need to fill each ...

7 years ago | 2 answers | 0

2

answers

Question


Why aren't i able to create database to store extracted values?
My goal is to that take a folder's path as input and extract the features of every image and place it in a file to create a matr...

7 years ago | 1 answer | 0

1

answer

Question


How to create database to store extracted values?
I have extracted 110 features of an image and input them in a features vector A: A=[f1,f2,f3,f4....,f110]; How can i cre...

7 years ago | 1 answer | 0

1

answer

Question


How to transform a 1d vector of multiple elements to 1 element?
Let's say i have the following 1 dimensional vector of features extracted from an image: vect=[v1,v2,v3,v4,.....v20]; Ho...

7 years ago | 1 answer | 0

1

answer

Question


How to create a database of feature vectors for images?
I have a database of around 4 classes each consistent of around 50 images.I created a features vector on matlab to extract the f...

7 years ago | 1 answer | 0

1

answer

Question


How to get the mean of a vector ?
Trying to get the average of the 4 values in contrast by M=mean(cbr.contrast); and it's not working,also tried M= mean(cbr) d...

7 years ago | 1 answer | 0

1

answer

Question


How to feature extract from an image with black background(without taking the black background in consideration)?
I was scrolling through some answers of the same issue and got the following C = num2cell(YourImage); C(~YourImage) = {...

7 years ago | 1 answer | 0

1

answer

Question


That mind sound like a silly question but how can i resize the image MINIMIZING the blurring and distortion effect?
and yes i am aware of imresize just wondering if a better solution exists that'll reduce the blurring affect when i resize for b...

7 years ago | 1 answer | 0

1

answer

Question


How to calculate the contrast energy, entropy of a ROI(Region of interest) of an image using GLCM feature extractactions method?
I need to extract GLCM features like energy entropy contrast among others of the REGION OF INTEREST ONLY excluding the black bac...

7 years ago | 3 answers | 0

3

answers

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