Community Profile

# Constantino Carlos Reyes-Aldasoro

### City, University of London

80 total contributions since 2016

Senior Lecturer in Biomedical Image Analysis at City, University of London. Huge Matlab fan, wrote the book "Biomedical Image Analysis Recipes in MATLAB: For Life Scientists and Engineers" published by Wiley-Blackwell.

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Problem finding the index?
Hello, you have a very subtle problem, and it is that you do not have a value of 40 in your matrix. If you see the value of loca...

8 days ago | 0

Problem finding the index?
Ok, a problem of precision, I will edit the previous answer to have the complete solution

8 days ago | 1

How to display UNICODE/IPA characters within GUIs and plots?
Hello. This may seem rather simple but it *works*, you can just copy-paste the symbols from a webpage, for instance https://e...

8 days ago | 0

Extract specific row from an image and average with a variable number of adjacent rows
Certainly it can be done much easier. Instead of this yth_row=(img(xcol,:)+img(xcol-1,:)+img(xcol+1,:)+img(xcol-2,:)+img(xcol+...

11 days ago | 0

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how to trace black and white region separately in an binary image
generate 2 images, one at which you threshold for bright values, and one for which you threshold for dark values. Once you have ...

11 days ago | 0

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How to detect start points and end points of plateaus in graph plotted from a data set?
There are some uncertainties in your problem: How noisy is the data? Is there variation of intensity within the plateau? Do ...

11 days ago | 0

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video convert to PNG but black and white
It may be an issue with data types like double, uint8, etc. Instead of imshow try imagesc and also try imshow(A/max(A(:))); ...

15 days ago | 0

PROBLEM IN PLOTTING THE FOURIER SEIRES
The problem you are facing is that your calculations are generating NaNs: >> zt zt = Columns 1 through 3 NaN...

15 days ago | 0

Segmentation shoulder X-ray image
Ok, here is the solution, following the ideas I had previously described. I downloaded your edges so it may not be exaclty the s...

15 days ago | 1

calculate volume under of 3D isosurface plot
What isosurface and isovalue are doing are generating a surface around those points that are above a certain value. All code you...

15 days ago | 0

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Counting wheat plants in a photo
It is not clear what you have already done to reach the b/w images, what I would do as first steps would be 1) exploit the fact...

16 days ago | 0

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Segmentation shoulder X-ray image
Ok, this is a good start, try the following, assuming that your image is a b = edge(a,'Canny',[],3); So what you showed wa...

18 days ago | 0

Empty variables and vectors
I think we need a bit more information to fully understand each other, but let's see if this helps you have three variables a,b...

19 days ago | 0

FFT of sine wave not plotting
In addition to the previous comment 2 issues: 1) FFT will give a complex answer so you will need to plot the absolute values ...

19 days ago | 0

Segmentation shoulder X-ray image
Not trivial as the intensity is high on the top and right side of the image. Otherwise a thresholding after low pass filtering c...

19 days ago | 0

how to get lowest row number in matrix?
use min https://uk.mathworks.com/help/matlab/ref/min.html

19 days ago | 0

Empty variables and vectors
yes, it is easy declare the variables as empty: a =[]; b=[]; c = []; then run the rest of the code and when you reach you...

19 days ago | 0

Get the first file in each folder
Use the command "dir" and do it in loops: dir0 = dir('firstFolder'); numEntries = size(dir0,1) Then loop: for k=1:numE...

19 days ago | 0

Close all figures which are not docked
When figures are docked, the position always start in the origin (i.e. 1,1), you could detect this location by using gcf like th...

19 days ago | 1

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Plot a series of boxplots from one column of a series of cells in a cell array

1 month ago | 0

Submitted

removeLineArtefact
Remove line artefacts sometimes present in microscopical images

Submitted

ElectroPalatography
Processing, Analysis and Visualisation of Phonetics and Electropalatography

Submitted

Data Mining and Visualisation of PubMed
Visualisation and data mining of the public database of biomedical literature PubMed

Plot a series of boxplots from one column of a series of cells in a cell array
I think that the problem is that you are using CELL, instead of a simple matrix. See my example: C =[]; for k=1:120 C1 = k*...

2 months ago | 1

how to compare ground truth image with segmented image?
Jaccard index is the intersection (BW.*BW2) over the union (BW|BW2) or ((BW+BW2)>0), so you can calculate directly like this ...

2 months ago | 0

Tumor Segmentation using FCM in Matlab code
The tumour is way brighter than the rest of the brain, I would think that simple thresholding (image>threshold) provides a good ...

2 months ago | 0

Plot a series of boxplots from one column of a series of cells in a cell array
Hi What I would do would be to loop over your cell, read the values that you want to display (second column right?) and place...

2 months ago | 0

Submitted

Legofy
Matlab: Convert a normal image (or internet image) into Lego-style, similar to https://github.com/JuanPotato/Legofy