Question

Is this another bug in imread(), or is this just a forum problem?
I've been finding that imread() will no longer correctly process images with alpha content when I try to use it in forum posts. ...

4 years ago | 2 answers | 1

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Answered
Why does imread read the alpha channel, but not the image itself?
Old question, I know, but I answer them when I'm bored. The reason that the image looks all black is because that's what it is....

4 years ago | 1

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Plotting non zero elements of an array
Try this instead. plot(nonzeros(X(temp,:,1)),nonzeros(Y(temp,:,1)), 'r+', 'MarkerSize', 5, 'LineWidth', 2);

4 years ago | 0

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How to re-order a string array?
Use this: https://www.mathworks.com/matlabcentral/fileexchange/47434-natural-order-filename-sort

4 years ago | 0

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I'm trying to plot a circle within an image, but the circle remain invisible.
This is using the given images. The circle is there; the ship is placed and the sprite alpha is used. hA = axes('units', 'norm...

4 years ago | 1

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How do I get user input and converts each character to specific string
If i'm just supposed to guess, then: % one char vec for each a b c, etc symbols = {'.-' '..' '--' 'dee' 'ee' 'eff' 'gee'}; ...

4 years ago | 0

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Reshape a 'column' matrix into a 'row' matrix
There are other ways this could be done, but just using reshape() and permute() is often the fastest: m = 5; p = 2; q = 5; ...

4 years ago | 0

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How do I use a matrix in a For Loop Iteration
There are undefined variables and functions being used. M, N, and R are all being overwritten, and there are likely array size ...

4 years ago | 0

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fonksiyonun bir önceki değerini hafızada tutması
This is more of a precalc problem than a MATLAB problem: i0 = 0; % initial condition h = 0.001; % rate parameter numsteps =...

4 years ago | 0

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Finding the dimensions of an image
Everyone has already given the obvious answer, so now it's my turn to say that I actually avoid using size() for image processin...

4 years ago | 1

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How to use a contour between two curves?
You can use a patch object, but you'll have to specify the colormapping. This should be fairly straightforward, as your vertice...

4 years ago | 0

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Putting a legend on a fused image
Here's one way to work around the issue: A = imread('cameraman.tif'); B = fliplr(A); F = imfuse(A,B,'falsecolor'); imsho...

4 years ago | 0

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Superimposing three images of different sizes
Usually when overlaying images as with imfuse(), the purpose is to compare differences in local object content. If the images a...

4 years ago | 0

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hitmiss my code is not running
This: hitE = [100; 110; 100] is not the same as this: hitE = [1 0 0; 1 1 0; 1 0 0]

4 years ago | 0

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How to show multiple colors in the same slots? (imagesc)
If each element of A represents a single "slot", then no. A pixel can be represented by only one color tuple. If you create ...

4 years ago | 1

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How to adjust the brightness of an image in YCbCr color space
You'd do it the same way you'd do it on any other image, only you'd operate on the Y component alone. That said, "adjust the br...

4 years ago | 0

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For Loop maximum graph
Idk why membrane doesn't allow for the x,y data to be an output argument, but it doesn't. You can just create them anyway. m =...

4 years ago | 0

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repeated addition of a singular number
What's wrong with just defining a linear vector? x = 0.0001:0.0001:0.1

4 years ago | 0

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How to blend an image patch within an image?
First off, imfuse() is more of a tool for offhand comparison of two images, not as a practical image composition or blending too...

4 years ago | 0

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I want to slide 3*3 window across image (I)
What is the question? There are many examples of doing this the hard way. If that's what you want to do, feel free to look. O...

4 years ago | 0

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How to give trail to particles/ How to fade out plots with time (complex example)
Here's one way using scatter3() % setting initial conditions % Number of particles N = 3; % i'm using fewer points for ease ...

4 years ago | 1

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How to create a math function with changeable number of arguments.
You might want to start reading about the usage of varargin: https://www.mathworks.com/help/matlab/ref/varargin.html https://w...

4 years ago | 1

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Answered
extract vector from large vector
Instead of generating a bunch of loose vectors, it's often better to just use a matrix: A = [0 0 0 1 2 3 4 5 6 7 8 9 10 11 12 1...

4 years ago | 0

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Pairwise image subtraction from a folder
Trying to increment j won't work like that. Just specify a vector that skips every other integer. In this case, label_name has...

4 years ago | 0

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Can anyone please help me in resolving this error: Incorrect input size. The input images must have a size of [32 32 1].
Without any information, I'm going to assume that the images are not single-channel images. switch size(thisimg,3) case 1 ...

4 years ago | 0

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As a vector into a matrix of non-uniform length
Here's one way x = rand(1,123); % n = 1003, 2055 , 7062 m = 10; % output array height trimlen = floor(numel(x)/m)*m; % numb...

4 years ago | 0

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Summing of no. in a coloumn
A = 1:10 B = cumsum(A)

4 years ago | 0

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If statement for matrix
If you want to change array values, why are you using disp()? This will produce the output of the same size: A = rand(4,3); % ...

4 years ago | 0

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Separate arrays within loop using indexing?
You should just be able to use a cell array. start = [1,8]; stop = [7,11]; data = [2,2,2,3,3,4,4,2,3,4,4,2]; % same thin...

4 years ago | 0

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How invert only one colour in RGB image?
The easy way to do this is L inversion. You can do this the hard way, or you can just use MIMT tools: inpict = imread('scope.p...

4 years ago | 0

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