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Constantino Carlos Reyes-Aldasoro


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City, University of London

107 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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Answered
How to create empty XYZ image matrix
In addition to the above, you can also consider zeros emptyMatrix = zeros(x,y,z); And then you can add values into that ma...

3 days ago | 0

Answered
growing bubbles with a predetermined radius in a given volume?
There is too little information to answer this question properly. Do you mean non-overlapping bubbles? and that they contact eac...

3 days ago | 0

Answered
How to split a 3d matrix into sub-3d matrices?
There is not enough information to be certain about your question, but by addressing your matrices you can create submatrices li...

3 days ago | 0

Answered
Image shows with imshowpair, but not with imshow
You have two options, use subplots subplot(121) imagesc(midAirImage) subplot(122) imagesc( bwImage) Alternatively you can...

15 days ago | 0

Submitted


Cell Migration in Scratch Wound Assays
Analyse and measure migration in Scratch Wound Assays

22 days ago | 4 downloads |

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Answered
Methods for analysis of plots in image processing
This seems rather simple. First, project your data to a single dimension, say your image is called data_2D, data_1D = sum(dat...

1 month ago | 0

| accepted

Answered
how to remove spot from an image.?
You should look for the extreme values of the intensities. The dark regions of the image are not as dark as the circle, so find ...

1 month ago | 0

Answered
Multiple contour plots with one colorbar
Hello I think you have asked a similar question, or at least the answer is similar and it is to use the handles of each element...

2 months ago | 0

| accepted

Answered
Segmentatio of ecg signal
Hello As mentioned previously, it is not possible to answer without more knowledge of the case itself. But I can point you to t...

3 months ago | 0

Answered
Fixing the appropriate threshold level to binarize a droplet image where the droplet area is found to vary with the threshold
Dear Anjan There is no exact way to decide the threshold. To illustrate this, I have taken a profile line to illustrate the i...

3 months ago | 0

Answered
How can I change data directly from the plot ?
To complement what Mehmed has just posted. It would be even easier if when you first create your figure, you save in handles all...

3 months ago | 2

Answered
How can i find the fundamental frequency of the signal using the autocorrelation function?
Have you considered using the Fourier Transform to convert from time domain to Frequency domain? There you can find the highest ...

3 months ago | 0

Answered
Not enough input arguments. Help?
Your problem may be that you are calling your function without the required input parameters your function requires one paramete...

4 months ago | 0

Answered
Why am I getting Nan values?
Hello There are several issues, but primarily about the way you use your code. 1) The code as it is is very long and convol...

4 months ago | 0

Answered
Need help with string counting
Perhaps the error is here: if strfind(str,'A') dydis = dydis + length(A); end You are detecting...

5 months ago | 1

Answered
Doubt in MATLAB coding.
This is a bit hard to solve without knowing more of the problem. What I would do is to break down the problem and analyse each s...

5 months ago | 0

Answered
How can I extract features about image texture?
Hello The basic concept of texture is that you will transform your image, which has a certain texture, to a different space, wh...

6 months ago | 0

Answered
what is a method for segmentation texture?
Hello The basic concept of texture is that you will transform your image, which has a certain texture, to a different space, wh...

6 months ago | 0

| accepted

Answered
Create empty rows in a cell, based in a condition
Hello I do not know why there should be rows that are skipped, unless you are copying and pasting and something goes wrong. I h...

6 months ago | 0

Answered
Reference to non-existent field 'a'.
This error is arising from trying to read a field from a structure, when the field is not existing for example >> example.a = 1...

6 months ago | 0

Answered
How to perform morphological reconstruction by dilation?
Dilation is rather simple, but perhaps there are more steps to what you want: f9_dil = imdilate(f9,strel('diamond',3));

7 months ago | 0

Answered
How to perform morphological reconstruction by dilation?
Dear Krishna I have seen several of your questions, I think that you would greatly benefit if you would study some Matlab and...

7 months ago | 0

Answered
How to extract features from candidates?
First you need to label your objects with bwlabel, e.g. labelled_image = bwlabel (original_image); that will return your same ...

7 months ago | 0

| accepted

Answered
finding length of scale bar from matrix form of image
As said before, not too difficult if you know what you need. Here is the code % Read the image imageWithScaleBar = imread('/...

7 months ago | 0

| accepted

Answered
finding length of scale bar from matrix form of image
This should be easy by thresholding for the levels expected (black will be low in the three RGB channels, but not necessarily 0)...

7 months ago | 0

Answered
unsers texture feature extraction
I would suggest that before using Unser's techniques (Where Unser is a person, Michael Unser http://bigwww.epfl.ch/unser/) try c...

7 months ago | 0

Answered
How to get the hue/saturation of a colourful images?
If you want hue and saturation, then what you need is to transform from RGB to HSV, try rgb2hsv.

7 months ago | 0

Answered
Matlab returns incorrect figure size when using figure with custom toolbar
I would support the idea of doing this through code. What you also do is once you have generated the GUI, grab the handles of th...

7 months ago | 0

Answered
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 months ago | 0

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

8 months ago | 1

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