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Constantino Carlos Reyes-Aldasoro


City, University of London

Last seen: 13 days ago Active 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 open .mat data in to excel sheet
You better export your data from Matlab into excel directly: https://uk.mathworks.com/help/matlab/import_export/exporting-to-ex...

29 days ago | 0

Answered
Change direction of the Y-axis for a single figure
What you need is to rotate, try imrotate https://uk.mathworks.com/help/images/ref/imrotate.html?searchHighlight=imrotate&s_ti...

29 days ago | 0

Answered
How do I clear the gradient of an image across pixels? (Image processing for the intensity of fluorescence)
Hello I am afraid the question is not very clear. What do you mean by "doesn't have a clear gradient across the pixels"? This s...

29 days ago | 0

Answered
How can I smooth a surf with many spikes?
If you just want to smooth the values, you could use a filter, from a small uniform filter like [1 1 1;1 1 1;1 1 1]/9 to a Gauss...

29 days ago | 0

Answered
compare edge detected images
It is a bit difficult to help without context and illustrations. If you could add some figures it would be easier to help.

2 months ago | 0

Answered
How to compute edge map from the image gradients?
It would help if you could add figures illustrating your problem.

2 months ago | 0

Answered
extraction road from lidar
This can be solved by using a combination of morphological operators and image processing steps: 1) label all the regions that ...

2 months ago | 0

Answered
Image Processing for Grain Size Analysis
You need to define your task first. What is it that you want to "calculate"? I am going to make an educated guess that it is the...

2 months ago | 0

Answered
Save a plot figure without the white background AROUND THE AXES
The issue is that you are trying to do 2 things in one, save as jpg, and have a transparent background. As far as I understand t...

2 months ago | 0

Answered
How to Make Segmentation of a Circular optic nerve in the eye for a Multiple images?
This question is about how the optic disc is defined, have you tried anything yet? Have you checked the literature about this? I...

3 months ago | 1

Answered
Vector estimate of importance of each word in a text
Why don't you start with a simpler problem, say that you want to count the occurrences of certain words. That would be a problem...

3 months ago | 0

Answered
How do I remove noise from point cloud data?
Hello It is very difficult to answer a question like this one, it may be that some filtering could solve your problem, but it d...

3 months ago | 0

Answered
How to use OpenCV imopen in Matlab?
Why don't you use matlab's native imopen function? https://uk.mathworks.com/help/images/ref/imopen.html

4 months ago | 0

Answered
Read the text files names are already in the table
If they are inside a folder, you could read the files in the folder and then loop over those files. If you have the names and ...

4 months ago | 0

| accepted

Answered
Converting binary to image file
You are mixing many things. If you use 'sobel' between single quotes you are using a string with the characters s o b e l. ...

4 months ago | 0

Answered
Deep Network Designer with dicom images
DICOM is treated differently than normal images as you will have many fields related with the images (like patient data). Have y...

4 months ago | 0

| accepted

Answered
how to view 4D-single Image
Hello It depends very much what you want and where you data comes from. A 4D data set may be a 3D + time data set and thus you ...

5 months ago | 0

Answered
Weird characters when editing figure
I would suggest that you do not edit the text of figures. The whole idea of using Matlab instead of photoshop/gimp/illustrator i...

5 months ago | 0

Answered
Bar graph and "stacked" options.
This is solved easily by adding zeros in the columns that you do not want a stack, e.g. bar ( [1 2 3;0 2 3;0 0 6]','stacked')...

5 months ago | 1

| accepted

Answered
Loading multiple datafiles into MATLAB and plotting a colourmap
In Matlab, the command "colormap" corresponds to the color/colours that are assigned to the intensity of a figure. You display 2...

5 months ago | 0

Answered
Problem saving plot as jpg or pdf
You could try to add the legend outside the actual axes, e.g. 'eastoutside', have a look here: https://uk.mathworks.com/help/ma...

5 months ago | 1

| accepted

Answered
Grain Model how to remove smaller grains
Ok, I think now I understand your problem. I thought you had information on the grains themselves, but if you are starting with ...

6 months ago | 0

Answered
Grain Model how to remove smaller grains
A bit difficult to help more without the data but I think that your problem can be fixed by selecting your grains by the propert...

6 months ago | 0

Answered
how to find index in matrix and average data ?
You can try the following, instead of "finding" the locations, which will be the indices, just use the locations like this: sst...

6 months ago | 0

| accepted

Answered
How to make a loop inside a loop?
Difficult to answer without more context, but I suspect that the error is not related to the loops but something else. There are...

6 months ago | 0

Answered
Hough transform incorrectly identifying vertical line segments
Ok, 2 things, you are first comparing and then subtracting, which may be counteracting, you could calculate hough directly like ...

7 months ago | 0

Answered
Hough transform incorrectly identifying vertical line segments
Have you tried inverting the intensities of the image? As it is, white is the main element and that will be difficult to obtain ...

7 months ago | 0

Answered
Why are title and label not working on histogram?
You are using the commands incorrectly, by writing title = ('Temperatures @ Top') you are creating a new variable called title w...

7 months ago | 0

| accepted

Answered
Change variable name in plot
As mentioned before, this is not the best way to handle your data, BUT you are where you are, so to be able to use the names run...

7 months ago | 0

Answered
2D color map change the input of y axis
Hello There are 2 ways to change the values of the y axis, first is to change the values when you plot. I do not have your fi...

7 months ago | 0

| accepted

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