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How can I smooth out the colour of a image?
There are a number of things going wrong, but the reason why it's black is simple. FilterRed = picture(:,:,1); % this is uint...

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i have this code of " Power law transformation " on an image ?? why is the error occuring ??
There are a few things wrong here, but this question demonstrates one thing very clearly. If you can't be bothered to post read...

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How to calculate the dynamic range of an RGB image
The error occurs because you're trying to do everything with integer data. % read an image inpict = imread('peppers.png'); i...

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How can I remove the small blobs in ‘Blobs.jpg’? is it using filtering right? i got confused with the step to remove the blob on that image.
Something like this: % read an image inpict = imread('https://www.mathworks.com/matlabcentral/answers/uploaded_files/148990/im...

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add transparency to a contourf
The FaceAlpha and EdgeAlpha properties are new in R2022b. I'm not familiar with cotourfm() or mapping tools, so I can't comment...

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Plotting Mutually-Occluding (Knit) Curves in 2D
I'm going to assume that I'm the only person who would do it by image composition, but I guess that's the niche I've made for my...

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Plotting Mutually-Occluding (Knit) Curves in 2D
I'm going to take this cursory shot at doing it with plot3(). My curve construction is pretty naive, but I just found it easier...

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Plotting Mutually-Occluding (Knit) Curves in 2D
I was browsing and doing cleanup earlier, and I came across this misplaced question-as-answer on a question about basic plotting...

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stacking of large matrix into stack of small column matrix
I'm not really sure what exactly you want, but I'm going to take a guess anyway. I'm going to assume that nele is possibly less...

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How to look up a smaller array in a larger array while preserving shape
I'm going to demonstrate a couple ways you can do this using neighborhood operations. The case of a solid 2x2 nhood is a bit of...

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Color in Edge Detection with Sobel Operator on RGB Image Output
There's some confusion going on here. The colors in the two images represent different things. Let's start with the latter. ...

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Write a matlab function, image processing
There are countless sliding window filter examples here. I'm not going to write another. I don't have much patience for assign...

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Find width and height of .jpg image
See this https://www.mathworks.com/matlabcentral/answers/81089-finding-the-dimensions-of-an-image That said, how do you find t...

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resize images with zero padding
There are some things to consider when using padarray() to match image geometries. A = imread('cameraman.tif'); % 256x256x1 (...

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How to reconstruct the images from the blocks of pixel?
Matt's answer is probably the more general answer, but I'll repeat what he said. We can't know what order you're trying to tile...

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How to check if each element of a matrix is larger/smaller than the mean of the elements of the respective line?
Here's one way; I'm sure there are plenty of other ways. % some matrix A = magic(5) % row means rmn = mean(A,2) % element i...

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How can I make this graph with the "for" command?
Good gravy it's been forever since I did any of this. Here's a start. ze = [0 0.2 0.4 0.5 1 1.5]; for k = 1:numel(ze) % ...

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Separating YCbCr components of an image
See also: https://www.mathworks.com/matlabcentral/answers/580287-how-to-display-y-cb-and-cr-components-of-an-image#answer_95540...

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how to create color checkerboard any size
I'm going to treat this as two separate questions: How to create a colored checkerboard/chessboard How to make the squares ran...

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How to draw a shape using * and a loop
I seem to recall more, but I'm pretty sure I also recall some that got erased by the OP. Such are homework questions. https://...

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How to rotate this 2d matrix with some angle ?
You'll need more than zdata to rotate the plot. You'll need to define the x and y positions of the points. If you just want ...

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size of the left side is 2-by-1 and the size of the right side is 1-by-1001
I think this is what you're after: err_semi_imp(:,n) = max(abs(u_semi_imp_euler - u_exact(taxis)),[],2);

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How to display a number of black tiles on a figure
Depends what you mean by "tiles", and it depends what you want to do with the output. This might help. A = ones(100,100); f...

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Do not use the for loop to calculate the first number greater than 0 in each line
Here's one way. x = randn(10,10) [~,idx] = min(x<=0,[],2) % note the logical inversion firstnz = x(sub2ind(size(x),(1:size(x...

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How matlab calculate SINR? (Mathematically)
The documentation for sinr is fairly descriptive. From the synopsis: The default propagation model is Longley-Rice when terrai...

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how to fill the circle with grids?
Not sure where this is going, but here's one way. Instead of doing normal line-circle intersection finding, I'm going to find...

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i need to pad my matrix only from the ends like this picture
You should be able to use padarray() to pad with constant values. A = magic(5) Apadded = padarray(A,[3 3],0,'post') In this e...

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How can I set xticklabels to an array?
The array given to xticklabels() doesn't have to be a cell array of chars. It can be a cell vector of chars a cell vector of ...

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Find the perimeter of the shaded region-- the logical "1."
See bwperim() or regionprops() to get the perimeter. If you want to come up with a different way to define the perimeter, that'...

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MATLAB plot image margin removal and aspect ratio keeping
Save the image, not a screenshot of the image. Saving things by capturing figures is a poorly controlled workflow and is often ...

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