Efstathios Kontolatis

Con actividad desde 2016

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Continuous wavelet transform using derivative of Gaussian(DOG) wavelet
I am trying to do continuous wavelet transform using a derivative of Gaussian order two wavelet. I want to obtain the frequencie...

alrededor de 9 años hace | 1 respuesta | 0

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Zero mean values but still dominant frequency is zero
Hello, I have a series of numbers and I try to find the dominant frequency using FFT. I know that for the FFT to work properl...

más de 9 años hace | 1 respuesta | 0

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How to perform fft
I have 1000 samples from an experiment with frequency Fs=67890 Hz. How can I perform fft on them? I followed the guide here <htt...

más de 9 años hace | 2 respuestas | 0

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How to extract a vector from an image?
Hello, I have this image <</matlabcentral/answers/uploaded_files/70446/1.png>> and I want to extract only the velocity...

más de 9 años hace | 3 respuestas | 0

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How can I change the tick labels in a colorbar
I have some images that contain probability data. Thus, the colorbar is [0 1]. However, when I plot them I want the colorbar tic...

más de 9 años hace | 1 respuesta | 0

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How to find arrays in a cell array
Hi guys, I have a cell array(let's say c) consisting of 2D arrays and I want to find all the arrays that(say a is an array) h...

más de 9 años hace | 2 respuestas | 0

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Edge detection only in a region of an image
I have an image and I want to make edge detection only on a region of this. In order to do so I have created a complex polygon u...

casi 10 años hace | 1 respuesta | 0

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How to find the pixels of certain regions in a binary image
I have created a binary image which contains the edges of an image. I want to keep only the pixels of the regions that have an a...

casi 10 años hace | 2 respuestas | 0

2

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Problem with Matlab sliding neighborhoods
I have an image. I want to create a sliding window of changing size and want to make some calculations depending on some criteri...

casi 10 años hace | 1 respuesta | 0

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Which is the best method for edge detection in this image
I have the following image but the methods that exist in MATLAB (Sobel,Canny etc) don't give something acceptable. Does anyone h...

casi 10 años hace | 1 respuesta | 0

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I have two images. The first one is produced from the second one but I have to find how.
I have two images. The first one is produced from the second one and I have to find how this happens. Is there a way in MATLAB t...

casi 10 años hace | 2 respuestas | 0

2

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how can i show two images with different range with imagesc
I have two uint16 images with different range, let's say the one has a range from 0 to 1800 and the other from 0 to 2500. In ord...

casi 10 años hace | 0 respuestas | 0

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Neighbors of a pixel
I want to calculate the mean of the neighbors of the pixels in an image. I want to do it for all pixels not only the internal on...

alrededor de 10 años hace | 4 respuestas | 0

4

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Problem with the im2uint16
I need to create a series of mean images. So I created the following code function [meanbgimage] = impostprocbg(bgpath) ...

alrededor de 10 años hace | 1 respuesta | 0

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Apply mean and standard deviation of an image to another image
Hi I have an image and I calculate the mean and standard deviation like this meanint=mean(mean(tmpimg)); stdint=std(st...