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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...

fast 9 Jahre vor | 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...

fast 9 Jahre vor | 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...

fast 9 Jahre vor | 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...

fast 9 Jahre vor | 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...

fast 9 Jahre vor | 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...

fast 9 Jahre vor | 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...

fast 9 Jahre vor | 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 ...

etwa 9 Jahre vor | 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...

etwa 9 Jahre vor | 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...

etwa 9 Jahre vor | 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...

etwa 9 Jahre vor | 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...

mehr als 9 Jahre vor | 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...

mehr als 9 Jahre vor | 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...

mehr als 9 Jahre vor | 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...

mehr als 9 Jahre vor | 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...

mehr als 9 Jahre vor | 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...

mehr als 9 Jahre vor | 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...

mehr als 9 Jahre vor | 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...

mehr als 9 Jahre vor | 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 ...

mehr als 9 Jahre vor | 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...

mehr als 9 Jahre vor | 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...

mehr als 9 Jahre vor | 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? ...

mehr als 9 Jahre vor | 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...

mehr als 9 Jahre vor | 0

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

mehr als 9 Jahre vor | 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...

mehr als 9 Jahre vor | 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/...

mehr als 9 Jahre vor | 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 ...

mehr als 9 Jahre vor | 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 ...

mehr als 9 Jahre vor | 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

mehr als 9 Jahre vor | 2