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Counting of Lights
Sure, but exactly how you do it depends on many factors which you haven't stated in your question. Without that information, ...

quasi 15 anni fa | 0

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to find length of edges
Guessing a little, but I suspect that the following functions will be sufficient: * sum * bwlabel * regionprops

quasi 15 anni fa | 0

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How can I make a specific color of an image transparent?
There may be a way that allows you to overlay the images using graphics operations, but here's an alternative way that does it b...

quasi 15 anni fa | 3

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How to find the cost for implementing an fft
I guess you mean the cost involved in _executing_ an fft. (The cost involved in _implementing_ an fft would the amount you'd nee...

quasi 15 anni fa | 0

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struct array
for i=1:4 Data.(Name{i}) = Temp{1,i}; end

quasi 15 anni fa | 0

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8-bit plane slicing for an image
You should be able to simply use bitget, as in im = imread('pout.tif'); bit1 = bitget(im, 1); % lsb for example ims...

quasi 15 anni fa | 2

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How to get the coordinate of this four points?
Here's another approach which works with the clean image you've given us. It's not as neat as <http://www.mathworks.co.uk/matlab...

quasi 15 anni fa | 2

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array dimensions equivalence check?
One alternative: isequal(size(A), size(B)) || (isvector(A) && isvector(B) && numel(A) == numel(B))

quasi 15 anni fa | 6

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error: Subscripted assignment dimension mismatch
The problem is that the length of the output vector depends on the time delay. Each time df is called, it produces a vector of a...

quasi 15 anni fa | 1

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To split a matrix into equal parts.
If your original matrix is m, then provided its size is even on each dimension, you can divide it into four equal pieces like th...

quasi 15 anni fa | 1

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How to calculate with sigma notation in matlab?
If you need a numerical result, the sigma notation turns into a call to the sum() function. Your example might look something li...

quasi 15 anni fa | 0

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change the angle of fourier transform and see the new image
You need to combine the angle and the amplitude to get a single complex array before inverse transforming. Try imshow(ifft2...

quasi 15 anni fa | 1

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how to segment the grey level image by using watershed algorithm
There is sample code in the demo "Marker-controlled watershed segmentation" in the Image Processing Toolbox, if you have it.

quasi 15 anni fa | 0

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what is ground truth image? how to create it in matlab??
"Ground truth" means a set of measurements that is known to be much more accurate than measurements from the system you are test...

quasi 15 anni fa | 4

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read a radiology image series ( DICOM ) on MATLAB platform
MATLAB has an <http://www.mathworks.co.uk/products/image/index.html Image Processing Toolbox> which has many tools for image pro...

quasi 15 anni fa | 1

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how can i blur an image by removing high frequencies of it's DFT
There's a demo that does this <http://www.mathworks.co.uk/matlabcentral/fileexchange/28810-fourier-transform-demonstration here>...

quasi 15 anni fa | 0

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Deriving PDF from a given signal without using the hist() function?
The pdf function is not useful for this. It generates the theoretical PDF for a named distribution, but does not estimate an emp...

quasi 15 anni fa | 1

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Real cepstrum in loop
Your receps function returns a vector with 240 elements, and you are trying to assign these to a single element of tab. The erro...

quasi 15 anni fa | 0

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Spatial Frequency
From <http://www.mathworks.co.uk/matlabcentral/fileexchange/28810-fourier-transform-demonstration this demo>: The Fourier com...

quasi 15 anni fa | 0

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Counting the pixels within a circle detected in an image
How standard are your images? Could you choose the circle whose radius and centre coordinates are within expected ranges? If yo...

quasi 15 anni fa | 1

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Edge Detectors
Canny.

quasi 15 anni fa | 0

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Detecting circles in an image
You could try *normxcorr2*. There's example code in the accepted answer to <http://www.mathworks.co.uk/matlabcentral/answers/244...

quasi 15 anni fa | 0

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what is Frequency in a image
<http://www.mathworks.co.uk/matlabcentral/fileexchange/28810-fourier-transform-demonstration Another tutorial>

quasi 15 anni fa | 1

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Pupil Detection using Hough Transform
It's hard to help when you don't say what you have tried so far. The HT contributions on the file exchange should work - have yo...

quasi 15 anni fa | 0

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Image processing using indexing
The details depend on what class your images are, but here's an example that you can probably modify as needed. % test data -...

quasi 15 anni fa | 0

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Using Optical Flow to warp an image
Given a vector for every pixel, you can use interp2 to do the warping and to handle the non-integer lookup. Suppose that vx repr...

quasi 15 anni fa | 4

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matrix ifft tranform
m = [1 1 -1 1 % data matrix 1 1 1 1 -1 -1 -1 1 1 -1 -1 -1 1 -1 -1 -1 -1 -1 1 1 1 1...

quasi 15 anni fa | 0

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electromagnetism
To distinguish blurred and sharp images, you could use a standard measure of blur, such as <http://stefan.winklerbros.net/Public...

quasi 15 anni fa | 0

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vectors from array
vector = array(:, column_number)

quasi 15 anni fa | 0

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Cut an image based on pixel size
You can cut the blob up using morphological operations, as shown below. A point on terminology: all pixels are the same size ...

quasi 15 anni fa | 0

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