Massimo Zanetti

Last seen: 13 dagen ago | Active since 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...

ongeveer 2 jaar ago | 2 answers | 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...

bijna 5 jaar ago | 1 answer | 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...

meer dan 7 jaar ago | 0

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

meer dan 7 jaar ago | 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...

meer dan 7 jaar ago | 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...

meer dan 7 jaar ago | 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...

meer dan 7 jaar ago | 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...

meer dan 7 jaar ago | 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)

meer dan 7 jaar ago | 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...

meer dan 7 jaar ago | 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>

meer dan 7 jaar ago | 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...

meer dan 7 jaar ago | 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...

meer dan 7 jaar ago | 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>...

meer dan 7 jaar ago | 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...

meer dan 7 jaar ago | 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...

meer dan 7 jaar ago | 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...

meer dan 7 jaar ago | 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 ...

meer dan 7 jaar ago | 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...

meer dan 7 jaar ago | 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...

bijna 8 jaar ago | 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...

bijna 8 jaar ago | 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...

bijna 8 jaar ago | 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...

bijna 8 jaar ago | 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...

bijna 8 jaar ago | 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>

bijna 8 jaar ago | 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...

bijna 8 jaar ago | 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;...

bijna 8 jaar ago | 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...

bijna 8 jaar ago | 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...

bijna 8 jaar ago | 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...

bijna 8 jaar ago | 0

Massimo Zanetti

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