Answered
Sum values from one column vector based on another column vector
Assuming A and B are different variable names with the same length: A = [1; 2; 4; 1]; B = [34; 78; 3; 28]; mysum = sum(B(A==1...

1 month ago | 0

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Answered
Right-side text limit working erratically while changing the font
I played around with this in R2019b. Bear in mind that there are two relevant prefs here. The RH text limit is just an indicat...

1 month ago | 0

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Answered
use of strcmp with two conditions
Just a guess, since I have no idea what your array content or size are. strcmp() takes two arguments, but you're feeding it t...

1 month ago | 1

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webread not returning full html contents
Webread() just reads the page. It doesn't execute all the tons of scripts that are used to build the DOM. https://www.mathwork...

1 month ago | 0

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imshow breaks after changing uiaxes limits
You're specifying that the axes limits should be outside of the image region. currentimage = imread('cameraman.tif'); hi = i...

1 month ago | 0

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Answered
How can i fill NaN values on unwanted region of an image?
IPT regionfill() can do inpainting based on a logical mask. You could use isnan() to derive the mask from the image. Alterna...

1 month ago | 1

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Openfig+hold on
openfig opens figures hold toggles properties of axes It doesn't make sense to try to put a figure inside an axes. Perhaps yo...

1 month ago | 1

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Welcome... I need code in matlab to enhancement face images, enhancement methods(HE,AHE,CLAHE) and then measure(MSE,PSNR)
Look at the documentation for histeq adapthisteq immse psnr adapthisteq() does CLAHE by default. If you want AHE without...

1 month ago | 0

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Plotted image is clear but saved image is blurry- why?
If you want to retain the crisp edges of the original low-resolution image, you cannot use a continuous interpolant. The defaul...

1 month ago | 1

Answered
Divide an image vertically into two equally luminous parts, ..., calculate the luminance of each part.., PERSONAL NON-FUNDED RESEARCH,
I'm just going to repost this here, since all the cool kids are posting on this one and the other one is closed anyway. :) A = ...

1 month ago | 0

Answered
Divide an image vertically into two equally luminous parts, bisect these two parts, calculate the luminance of each part....
Something like this? A = imread('peppers.png'); A = rgb2gray(A); % BT601 luma A = im2double(A); % split the image into two...

1 month ago | 0

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Answered
Repair damaged circles and create closed curves
I suppose my solution has a weakness that should've been obvious to me. It fails if it has to do extrapolation to bridge a gap. ...

1 month ago | 0

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Answered
Can MATLAB do radial enlargements of plots?
You could do this by simply transforming the data itself scale = 2; center = [1 2]; % [x y] r = 1; th = 0:360; x = r*cosd...

1 month ago | 0

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Answered
creating a video - zoom in effect of still image
You can get a bit better results by not rounding the rect parameter scaling prior to cropping It's not perfect, but it's a b...

1 month ago | 1

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I have tried many different ways of plotting but it won't make a line graph can someone help me out?
You are creating a plot object that contains only one point, but have no specified marker style to indicate those points. There...

1 month ago | 0

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how do i find a set using matrix
Like this? sza = 10; A = randi([1 10],sza) % output will be variable-length % preallocate to maximum length kmax = max(si...

1 month ago | 0

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any ideas for making code faster?
Here. This is about 5x as fast, though it could be improved I'm sure. R = [0.004 0.0057 0.005 0.005 0.0045 0.0044 0.005]; X =...

2 months ago | 0

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Answered
How to save Histogram of Multiple Images
This should be a start sourcefolder = 'E:\input'; filepattern = fullfile(sourcefolder, '*.png'); % this shouldn't be in the...

2 months ago | 0

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Answered
Index exceeds the number of array elements in image processing.
Obviously, not all columns of the edgemap will contain nonzero elements, so r will often be zero-length. Also, Graycrop isn't u...

2 months ago | 0

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thermal image processing to get the temprature on each pixel
Image Analyst has a number of examples https://www.mathworks.com/matlabcentral/answers/320467-i-need-to-convert-rgb-image-into...

2 months ago | 0

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Answered
convert image in matlab
As IA notes, in order to find out how to do a Photoshop task in MATLAB, you figure out how to do it in Photoshop first. Transla...

2 months ago | 0

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Place one image on a blank image but several times i.e (passport style)
If the FG images are simple, solid rectangular images, you can just write a loop and insert each image into the background by di...

2 months ago | 0

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How to blur with a controlled area?
If the user has Image Processing Toolbox, using roifilt2() or even imfilter()/imgaussfilt() could simplify the task. For a smal...

2 months ago | 0

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Fill contour color into the graph
I somehow doubt this is actually what you want, but I'll oblige. % given theta = [80.86 81.36 81.82 82.38 82.98 83.64 84.28 85...

2 months ago | 0

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Save a grayscale image as an colored image
Depending on what you mean when you say you want it to be a colored image, this might have the answer: https://www.mathworks.co...

2 months ago | 0

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Answered
How to generate a multi-dimensional array from a vector ?
I'm sure there are more elegant ways, but here's this. I'm pretty sure it works. % inputs m = 3; x = [1 2 3 4 5 6 7 8 9]; ...

2 months ago | 0

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MATLAB output is a bunch of numbers with operators not the exact number
To be pedantic, those expressions are the exact result. The decimal values are an approximation. That said, you should be ab...

2 months ago | 0

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this is a part of my code, I am getting this message. "Unable to perform assignment because the indices on the left side are not compatible with the size of the right side."
I'm going to go out on a limb and say that there's no reason to believe that the RHS of this assignment is a scalar. index(i)...

2 months ago | 0

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Answered
How can i correct brightness of a monochrome image using arithmetic operations?
For basic brightness/contrast controls, see this demo. https://www.mathworks.com/matlabcentral/answers/496452-contrast-vs-brigh...

2 months ago | 0

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How can I combine bit map images to get back the original grey scale image?
Using a bunch of numbered variables forces you into writing unnecessarily repetitive code. This can be simplified. One way wou...

2 months ago | 0

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