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how to produce a signal distorted with noise?
It depends on what characteristics you want the noise to have. If you want noise from a normal distribution with the samples ind...

約15年前 | 0

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Scale a histogram to get area = 1
If equally-spaced bins are OK, you can do this: % some data d = randn(10000, 1); %compute histogram nbins = 50...

約15年前 | 1

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Dear sir my research topic is object detection in image using pso. So sir i wnat to see the array generated by agiven input.
The functions image(C) and imagesc(C) will display the array C as an image in a figure window. If you have the Image Processing ...

約15年前 | 0

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undefined variable, passive variable vector
In MATLAB, you probably don't need to make the vector before you know its size. You don't have to declare variables, so the best...

約15年前 | 1

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whay do we use @(t) in our code???
It's constructing anonymous functions. See <http://www.mathworks.com/help/techdoc/matlab_prog/f4-70115.html> and <http://www.mat...

約15年前 | 0

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Combine Matlab and Java
I've used MATLAB to call Java methods. One purpose was to capture and analyse data from a Phidgets accelerometer, which didn't h...

約15年前 | 0

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xcorr vs conv: in latest MATLAB version
Surely the definition of xcorr was, and still is, the final formula you give (with the + sign in the index), and this is consist...

約15年前 | 0

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How are method names with a dot in them accessed in classes?
For normal classes, the set/get methods are called automatically when you assign to or access a property: h.AccountStatus = '...

約15年前 | 2

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How to set Frames Per second
I do not think getsnapshot is suitable for working with a video stream - it's really for getting a single image at a random time...

約15年前 | 0

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How long have you been using matlab? tell us your story
I learnt to program originally in Fortran. (My first programs, as an undergraduate, were on punched cards.) After various other ...

約15年前 | 4

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Infinite loop
CTRL+C should normally stop such a script, unless you're calling a MEX function.

約15年前 | 0

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Search nx3 array row-wise for 2 equal elements
My initial idea is below, but someone may be able to improve on it in efficiency or elegance. There is an awkwardness in this s...

約15年前 | 0

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edge parameter
I'm not sure what the edge parameter of an image is. If you mean the edge map, and you have the Image Processing Toolbox, the ed...

約15年前 | 0

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Verifying user input
If you're using a Command Window interface, then you could employ this function, which I wrote a while back. I use it to ensure ...

約15年前 | 2

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What is the measurement unit for the optical flow velocity components?
The units depend on what the function OpticalFlowMatlab does. I don't know this function, so I can't be sure. Normally, the unit...

約15年前 | 0

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rgb components
It depends on how the image is currently stored. Assuming it is stored as an RGB image, you can extract the components by indexi...

約15年前 | 1

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extract randomly a pair from a list
Two suggestions. First: selector1 = @() list(ceil(rand*size(list,1)), :); Then each time you call x = selector1() you wi...

約15年前 | 0

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Define shared subfunctions inside a classdef *.m file?
Non-static methods require an object as the first argument, and as my_pi is not declared static and doesn't have an argument, it...

約15年前 | 0

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eval inside arrayfun gives strange error
First, I have to add myself to the list of people for whom it is painful to see someone using sequential variable names construc...

約15年前 | 2

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How to plot a graph of a line of pixels of an image showing black to white intensity across it.
If you have the Image Processing Toolbox, have a look at improfile.

約15年前 | 2

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Dynamically write images in different names?
See "How can I process a sequence of files?" at <http://matlab.wikia.com/wiki/FAQ>

約15年前 | 0

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Converting gray scale to ycbcr??
A greyscale image has no colour information, but you can still represent it as ycbcr if you wish - though it's not clear why you...

約15年前 | 0

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I want to compare a given input image from a set of images and display the corresponding image
You need to put the different filenames into a cell array. If you concatenate them into an ordinary array, you just get a long s...

約15年前 | 0

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Path between pixels
The general statement can be expanded to a series of statements: (x0, y0) is adjacent to (x1, y1) (x1, y1) is adjacent...

約15年前 | 1

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Hump-day puzzler.
If you can read very quickly: [fprintf('I love MATLAB') regexp('x', '(?@quit)')]

約15年前 | 2

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Hump-day puzzler.
Assuming that execution time isn't a concern, and, please, no typing while the code is running: [fprintf('I love MATLAB') i...

約15年前 | 0

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reconstruction of video from separated frames
Have a look at getframe, im2frame and avifile.

約15年前 | 0

質問

Finding example images in the distribution
Is there an easy way to find all the example images (such as pout.tif, greens.jpg) that come with MATLAB and any installed toolb...

約15年前 | 3 件の回答 | 2

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detect the major color in an image- red or blue ?
The question here is surely how to define what you mean by "the major colour is green or red". If you can explain what that mean...

約15年前 | 1

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Random Corner Patches
It depends on how you plan to use the random corners, and what statistics or other properties you want them to have. If you w...

約15年前 | 0