Answered
Simulating human vision system.
I have to say that if you have no experience of MATLAB this is quite a tough project to start with. It's easier to learn a new l...
Simulating human vision system.
I have to say that if you have no experience of MATLAB this is quite a tough project to start with. It's easier to learn a new l...
15 years ago | 0
| accepted
Answered
Problem with phase in FFT analysis
The problem is that there is not an exact whole number of cycles of the sine wave in the original time series. If you look at th...
Problem with phase in FFT analysis
The problem is that there is not an exact whole number of cycles of the sine wave in the original time series. If you look at th...
15 years ago | 5
| accepted
Answered
How to remove single quotes using regexprep
The solution using regexprep is just D = regexprep(C, '''', '');
How to remove single quotes using regexprep
The solution using regexprep is just D = regexprep(C, '''', '');
16 years ago | 1
Answered
Locating Peaks Naively
In case you don't have the Signal Processing Toolbox, or its findpeaks function is not general enough, you could try the followi...
Locating Peaks Naively
In case you don't have the Signal Processing Toolbox, or its findpeaks function is not general enough, you could try the followi...
16 years ago | 2
| accepted
Answered
Is there a method to sort a list an array of words alphabetically (natural order sorting)
>> sort({'gamma', 'delta', 'alpha', 'beta'}) ans = 'alpha' 'beta' 'delta' 'gamma'
Is there a method to sort a list an array of words alphabetically (natural order sorting)
>> sort({'gamma', 'delta', 'alpha', 'beta'}) ans = 'alpha' 'beta' 'delta' 'gamma'
16 years ago | 5
| accepted
Answered
Pattern Extraction from an image?
You can pull out the part of the image round location (x,y) like this: pattern = image(y-h:y+h, x-h:x+h); This assumes ...
Pattern Extraction from an image?
You can pull out the part of the image round location (x,y) like this: pattern = image(y-h:y+h, x-h:x+h); This assumes ...
16 years ago | 0
| accepted
Answered
How do you create a loop to find a coefficient value to which one of the variables in the function changes with every cycle
The first thing to be clear about is the distinction between the time step, dt, and the time itself, which might be called t. dt...
How do you create a loop to find a coefficient value to which one of the variables in the function changes with every cycle
The first thing to be clear about is the distinction between the time step, dt, and the time itself, which might be called t. dt...
16 years ago | 0
| accepted
Answered
2D FFT: problems with fftshift + setting up wavenumbers
You've used fftshift to put the zero-frequency component at the centre of the array F3. However, your wavevector matrices kx and...
2D FFT: problems with fftshift + setting up wavenumbers
You've used fftshift to put the zero-frequency component at the centre of the array F3. However, your wavevector matrices kx and...
16 years ago | 0
| accepted
Answered
Iteration of changing discrete variables
It depends on how the data for the four variables are stored. I'll assume you can read the data into four arrays, each of which ...
Iteration of changing discrete variables
It depends on how the data for the four variables are stored. I'll assume you can read the data into four arrays, each of which ...
16 years ago | 0
Answered
how to get low pass filter from image
It looks as if you didn't assign a value to the second input argument when you called the function. I also see that the first ar...
how to get low pass filter from image
It looks as if you didn't assign a value to the second input argument when you called the function. I also see that the first ar...
16 years ago | 0
Answered
Image retrieving
The fft can be reversed almost exactly (using ifft in Matlab). Any numerical errors will be tiny. The log-polar transformation ...
Image retrieving
The fft can be reversed almost exactly (using ifft in Matlab). Any numerical errors will be tiny. The log-polar transformation ...
16 years ago | 0
Answered
log-polar mapping conversion
The poster is using ImToPolar from the file exchange, which does a polar transform. However, the text says that a log-polar tran...
log-polar mapping conversion
The poster is using ImToPolar from the file exchange, which does a polar transform. However, the text says that a log-polar tran...
16 years ago | 2
Submitted
Fourier transform demonstration
An introductory demonstration of the discrete Fourier transform, making use of the fft function.
16 years ago | 6117 downloads |
Submitted
Extended array indexing
Indexes a virtual array formed by extending an array indefinitely on each dimension.
16 years ago | 693 downloads |
Submitted
Log-polar image sampling
Resamples an image from a conventional grid to a log-polar grid, and back.
16 years ago | 7806 downloads |
Submitted
Elementary Cellular Automata
Simulates any 1D nearest-neighbour binary cellular automaton.
16 years ago | 4617 downloads |
Submitted
Gabor function masks
Create Gabor-function convolution masks
18 years ago | 2532 downloads |