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how to calculate a digital value of a band in hyperspectral image
Your attached example is just a regular RGB-image, so to extract the intensities in the R, G, or B bands you simply do: Ri...

más de 8 años hace | 0

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noise removal from the part of the medical image where noise is actually present, not the whole image
If you know what regions of the images you have noise that needs filtering why not just filter those regions? Something like th...

más de 8 años hace | 0

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build a Surface plot
Have a look at the trisurf function, and if that's not good enough there used to be a couple of similar functions for making sur...

más de 8 años hace | 0

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Can I rotate an array by 15 degrees?.
As Stephen points out you need to specify matters a bit more. Primarily what rotate by 15 degrees would mean for arrays in dimen...

más de 8 años hace | 0

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Warning: The system is rank-deficient. Solution is not unique.
When I try your example eqn becomes a horribly ugly system of equations, try your example with the semicolon removed at the "eq...

más de 8 años hace | 1

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how to find pixel having a specific value and copy those regions to a new matrix
Something like this should get what you ask for: Img = peaks; clf subplot(2,1,1) imagesc(Img),colorbar I2 = 0*I...

más de 8 años hace | 0

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i am working on image analysis of image generated by a CCD camera. and i need to calculate the value of peak intensity and the value of background intensity. how to do it??
Given an image Img the peak intensity is: Ipeak = max(Img); How to calculate the a background intensity is a way more ch...

más de 8 años hace | 0

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Vibration Analysis by using Fast Fourier Transform
Yes, go ahead and fft individual columns, for plotting it seems most likely you would plot the absolute of the fft, or possibly ...

casi 9 años hace | 1

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[GUIDE] How to create scroll bar that moves the whole graph sideways?
If you look at the file exchange there seems to be several different submissions that does a range of different scrolling implem...

casi 9 años hace | 0

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How can I make evenly distributed point on hemisphere mesh ?
There are a couple of submissions at the file exchange that deals with this type of problem. Maybe one of them will be good enou...

casi 9 años hace | 0

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how to install regtools package
That is(might be) a toolbox with a number of useful functions for solving and anlysing inverse problems, typically you should pu...

alrededor de 9 años hace | 0

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Volumetric slice plot of tomographic data
If you change your colour-map from black-white to white-black then you might get some mileage out of experimentations with alpha...

alrededor de 9 años hace | 1

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solving large number of simultaneous linear equations
If you simply use the standard numerical matrix capabilities of matlab something like this should be your solution: % I_L...

alrededor de 9 años hace | 0

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how to use fractional Fourier transform on image in matlab
Perhaps as simple as using the 1-D fractional Fourier transform along either dimension? I found this on the file exchange: <htt...

alrededor de 9 años hace | 0

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Can I model a 2nd order elliptical PDE using the PDE toolbox that has no BC for one of its edges?
Maybe I get this all wrong but to me it seems that what you implement in the FDM version is a Neumann BC with the gradient of th...

alrededor de 9 años hace | 0

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fourier transform space dependent function
You shouldn't do the inverse Fourier transform element by element. The inverse Fourier transform should be calculated in the fre...

alrededor de 9 años hace | 0

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How to generate signal with seasonal and diurnal component?
Well a first stab would be to look at this as a function that has a daily variation, i.e. a time-period of 24 hours, and then pe...

alrededor de 9 años hace | 0

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I have a discete probability distribution (histogram) and want to invoke rand to produce n random samples that follow the distribution specified by the histogram -how?
0, always start by looking for a solution at the file exchange. 1, I did a quick search and perhaps these submissions solves yo...

alrededor de 9 años hace | 0

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Hi guys, I am working on Barrel distortion correction using MATLAB. I have written code as per correction algorithm. I am unable to mathematically compare corrected output with original image can you suggest me some parameter for it..
Well, if the only thing you have is the original image you cant really tell. You kind of have to trust the task-givers world tha...

alrededor de 9 años hace | 0

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what must i do to bring a matlab program from Windows in ubuntu to work
Code contributer wasn't coding right for portability. Have a look at the documentation for fullfile and fileparts. Then set the ...

alrededor de 9 años hace | 0

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random Distribution Points inside rectangle
Have a look at the documentation of rand. That function gives you uniformly distributed random numbers between 0 and 1 (have fo...

alrededor de 9 años hace | 1

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CT Raw Images Reconstruction code
Shouldn't that just be a minor geometric transformation between the angles to your detector and the angles to the flat detector...

más de 9 años hace | 0

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Need to write a program that evaluates a postfix expression which is input by the user and then displays the answer.
If you want us to do your assignments you might have a better chance if you explicitly ask us to. What have you done so far? ...

más de 9 años hace | 0

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How can I plot spectrogram from discrete data?
Have a look at the documentation for the matlab function spectrogram: helpwin spectrogram From the question it seems t...

más de 9 años hace | 0

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Wrapping of cubic equation
Perhaps what you want is something like this: f_wrapped = rem(f,2*pi); HTH

más de 9 años hace | 0

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Unstable results using deconvlucy function
Without knowing exactly what your PSF looks like or is there are added noise to your delta-3D image, it is a bit difficult to gi...

más de 9 años hace | 0

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Fit a custom function to data with errors in all dimensions (i.e. nonlinear total least square, deming, odrpack?)
Well if you want some tools for matlab they aren't too difficult to find: <https://se.mathworks.com/matlabcentral/fileexchange/...

más de 9 años hace | 0

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How do I have matlab extract the max value of a column within a moving range?
If you have the image processing toolbox you have access to the function: ordfilt2 as far as I understand your question ...

más de 9 años hace | 0

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how many methods to solve de in matlab?
Sure thing! <https://en.wikipedia.org/wiki/Numerical_methods_for_ordinary_differential_equations Wikipedias overview-article on ...

más de 9 años hace | 0

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How can I show to column vectors side by side?
That should be as simple as: disp([[1;2;3],[6;4;1]]) HTH

más de 9 años hace | 2