Massimo Zanetti

University of Trento

Last seen: más de 1 año hace | Con actividad desde 2016

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I have received the M.S. degree in Mathematics from the University of Ferrara, Italy and the Ph.D. in Information and Communication Technologies at the University of Trento, Italy. My research interests include variational methods to segmentation, numerical optimization, remote sensing image processing, change detection in remote sensing images.

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Read/write georeferenced image
Hi, here I am wondering why this simple operation of reading a georeferenced .tif image and writing some results in the same geo...

más de 1 año hace | 2 respuestas | 0

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imadjust low_in high_in, why only in the range [0,1] ?
Hello, it looks a bit strange that the function imadjust accepts, other than single/double numeric types, also integer types, bu...

alrededor de 4 años hace | 1 respuesta | 0

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what is the meaning of this error?
Here the problem is not related to Matlab.. As far as I know opening a pdf from command line in Windows goes like this: path...

más de 6 años hace | 0

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Convert Cell to Struct
<https://it.mathworks.com/help/matlab/matlab_prog/access-data-in-a-structure-array.html>

más de 6 años hace | 0

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Moving a greyscale image such that the lowest pixel with an intensity above 0 is at the bottom of the image.
Use the |circshift| function, which shifts arrays along one dimension. Here is an example: %generate an image (matrix) A...

casi 7 años hace | 0

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How to fit multiple Gaussian functions in image without using the Curve fit GUI?
Hi Mishra, here it the function you need <https://it.mathworks.com/help/stats/fitgmdist.html fitgmdist>. It does fitting u...

casi 7 años hace | 1

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Matlab Training Course on your own: do we get a certificate? Which documentation is provided?
Hi Jesus, you can find all info about matlab certifications at: <https://it.mathworks.com/services/training/certification.h...

alrededor de 7 años hace | 1

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how to read a textfile that contain an array of text values into matrix
Here is it, you should know how many columns your data span (I guessed by reading your file they are 25): %open file fna...

alrededor de 7 años hace | 1

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convert fixed point to real data
Does this help you? %get sfi a = sfi(pi); %convert to double d = double(a)

alrededor de 7 años hace | 0

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How to crop a square that has a rotational angle?
Inspect this: <https://it.mathworks.com/help/images/ref/roipoly.html roipoly> Here is an example of what you can do: %op...

alrededor de 7 años hace | 2

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How to enhance an image with respect to an image of much better quality.
Try considering this: <https://it.mathworks.com/help/images/ref/imhistmatch.html histogram matching>

alrededor de 7 años hace | 0

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Partial transparent surface plot
Play with Chart Surface Options: <https://it.mathworks.com/help/matlab/ref/chartsurface-properties.html> You can set |Alpha...

alrededor de 7 años hace | 0

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How to make a curve smooth in spline block
If you want to approximate a set of points by a smooth curve you need a *smoothing spline*, not just a *spline*. Moreover, in yo...

alrededor de 7 años hace | 0

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Discard elements from structure array
There is a specific function to remove a field from a structure: <https://it.mathworks.com/help/matlab/ref/rmfield.html rmfield>...

alrededor de 7 años hace | 0

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Display values with fprintf
Here it is ret = 0.000065003; std = 0.0207; fprintf('The return is %.4e and the standard deviation is %.4f \n',ret,st...

alrededor de 7 años hace | 1

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How do I integrate this set of matrix data points
You just need one |for| loop as |trapz| operates also on matrices. This is the piece of code: A = rand(32); B = zeros(32...

alrededor de 7 años hace | 0

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Multiple .txt input files
Use |dir| function to list files with .txt extension %list folder files files = dir('*.txt'); and put your code in...

alrededor de 7 años hace | 1

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Cross correlation Between two matrices row by row
There are some issues in your code. # |crosscorr| function requires two vector inputs. |Ain01_correct(i,2)| it is not (it is ...

alrededor de 7 años hace | 0

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Please help me in generating a random string(row vector) in which each element has a different upper bound.
The useful way is U = [2,3,4,5,7]; A = arrayfun( @(x) randi([0,x]) , U ) but, if upper-bounds are 1-digit numbers, y...

alrededor de 7 años hace | 0

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How to display and delete different line in graph when checkbox check and uncheck
Yuo may find it useful reading these tutorials <https://it.mathworks.com/help/matlab/creating_guis/about-the-simple-guide-gui-ex...

alrededor de 7 años hace | 0

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Error: Undefined function <func_name> for input arguments of type 'double'.
Refer to your 2nd line of code fhd = str2func('f1'); The string |'f1'| evaluates to nothing in Matlab, therefore the com...

alrededor de 7 años hace | 0

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How do i represent a set of clusters points in scatter plot?
Hi, what you need is exactly Matlab <https://it.mathworks.com/help/stats/gscatter.html GSCATTER> function. Check out the help pa...

alrededor de 7 años hace | 0

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How to plot a mean value as a function of specific value pairs ?
First, notice that in Matlab |a=[ [1 2], [2 3], [4 5] ]| equals |a=[1,2,2,3,4,5]|. I guess, you meant to associate each entry of...

alrededor de 7 años hace | 0

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Binary file reader using fread function
The |fread| function read data in binary format, thus sequences of 0s and 1s. Therefore, you can read raw data just as a sequenc...

alrededor de 7 años hace | 1

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How to plot a function file
Check out the |stairs| function <https://it.mathworks.com/help/matlab/ref/stairs.html>

alrededor de 7 años hace | 0

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Why is probplot not plotting the reference line for one matrix column?
The problem is not due to -0 (which is the same as 0). It seems that your data in the first column are not even close to be Gaus...

alrededor de 7 años hace | 1

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3D surface plot from for loop
Most probably you don't want to plot a surface, instead a plot of a line in a 3D space. Try this: plot3(ang,Lp,d); grid on;...

alrededor de 7 años hace | 0

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How to detect & remove steps from signal?
Differentiate your signal (function |diff| in Matlab). The steps are located at points where first derivative is very high. Once...

alrededor de 7 años hace | 0

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how to concatenate mat files of different row sizes but same column size vertically?
In this line of code: Fv_ROI_concatenated = [a.TwoD_fv_roi_rangefilt_bdip,b.TwoD_fv_roi_rangefilt_bilateral,c.TwoD_fv_roi_r...

más de 7 años hace | 0

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Better skeletonization of an image to found branchpoints
Dilate your image before skeletonize it. Try this: %read image G = imread('grid.jpg'); G = im2bw(rgb2gray(G)); %di...

más de 7 años hace | 0

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Massimo Zanetti

University of Trento

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