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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, ...

14年以上 前 | 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

14年以上 前 | 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...

14年以上 前 | 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...

14年以上 前 | 0

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

14年以上 前 | 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...

14年以上 前 | 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...

14年以上 前 | 2

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

14年以上 前 | 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...

14年以上 前 | 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...

14年以上 前 | 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...

14年以上 前 | 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...

14年以上 前 | 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.

14年以上 前 | 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...

14年以上 前 | 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...

14年以上 前 | 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>...

14年以上 前 | 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...

14年以上 前 | 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...

14年以上 前 | 0

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

14年以上 前 | 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...

14年以上 前 | 1

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Edge Detectors
Canny.

14年以上 前 | 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...

14年以上 前 | 0

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

14年以上 前 | 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...

14年以上 前 | 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 -...

14年以上 前 | 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...

14年以上 前 | 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...

14年以上 前 | 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...

14年以上 前 | 0

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vectors from array
vector = array(:, column_number)

14年以上 前 | 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 ...

14年以上 前 | 0

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