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...

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...

5 månader ago | 0

| accepted

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. ...

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. ...

5 månader ago | 0

| accepted

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...

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...

5 månader ago | 0

| accepted

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...

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...

5 månader ago | 1

Answered

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...

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...

5 månader ago | 0

Answered

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...

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...

5 månader ago | 0

Answered

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 =...

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 =...

5 månader ago | 0

| accepted

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...

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...

5 månader ago | 0

| accepted

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...

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...

5 månader ago | 0

Answered

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...

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...

5 månader ago | 0

| accepted

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...

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...

5 månader ago | 0

Answered

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...

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...

5 månader ago | 0

Answered

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...

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...

5 månader ago | 0

Answered

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...

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...

5 månader ago | 0

Answered

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...

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...

5 månader ago | 0

| accepted

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]; ...

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]; ...

5 månader ago | 0

Answered

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...

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...

5 månader ago | 0

Answered

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)...

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)...

5 månader ago | 0

| accepted

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...

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...

5 månader ago | 0

Answered

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...

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...

5 månader ago | 0

Answered

How to superimpose many images using loop?

Imfuse is a simple tool for visually comparing two images. It has no practical use for processing more than two images. It sho...

How to superimpose many images using loop?

Imfuse is a simple tool for visually comparing two images. It has no practical use for processing more than two images. It sho...

5 månader ago | 0

Answered

How can I use sliceomatic for 3D plots without getting the below errors?

As far as I know, sliceomatic() has been broken for years. As the error says, 'new' is not a valid option for the 'nextplot' pr...

How can I use sliceomatic for 3D plots without getting the below errors?

As far as I know, sliceomatic() has been broken for years. As the error says, 'new' is not a valid option for the 'nextplot' pr...

5 månader ago | 0

Answered

Combining images to make a composite image

There are a number of ways to do this. As usual, I'm going to generalize a bit since I doubt OP is the one who will see this an...

Combining images to make a composite image

There are a number of ways to do this. As usual, I'm going to generalize a bit since I doubt OP is the one who will see this an...

5 månader ago | 0

Answered

How to overlap more than two images into a one image with Matlab?

Imfuse() is a simple tool for visually comparing two images. It has no utility for similar tasks involving more than two images...

How to overlap more than two images into a one image with Matlab?

Imfuse() is a simple tool for visually comparing two images. It has no utility for similar tasks involving more than two images...

5 månader ago | 0

Answered

if loop dosen't complete?

size() returns a variable-length vector. Don't compare against the size() of an array if you're trying to compare against a sca...

if loop dosen't complete?

size() returns a variable-length vector. Don't compare against the size() of an array if you're trying to compare against a sca...

5 månader ago | 1

| accepted

Answered

how to create random value matrix with size 3X5?

If the numbers are supposed to be integers: A = randi([1 10],3,5) otherwise, if the numbers can be any value in the specified ...

how to create random value matrix with size 3X5?

If the numbers are supposed to be integers: A = randi([1 10],3,5) otherwise, if the numbers can be any value in the specified ...

5 månader ago | 0

Answered

Running out of memory using imfuse repeatedly

The reason you're running out of memory is simple. Whenever imfuse() concatenates two images using the 'montage' option, the re...

Running out of memory using imfuse repeatedly

The reason you're running out of memory is simple. Whenever imfuse() concatenates two images using the 'montage' option, the re...

5 månader ago | 1

| accepted

Answered

Surround color for display

When you mask off data using NaN, the plot is simply not drawn there, revealing whatever graphics objects might be beneath it. ...

Surround color for display

When you mask off data using NaN, the plot is simply not drawn there, revealing whatever graphics objects might be beneath it. ...

5 månader ago | 0

| accepted

Answered

using nested for loop to print all of factorial

Something like this should be a start: for n = 1:100 % set a nested for loop factorials = 1; % this needs to be reset insi...

using nested for loop to print all of factorial

Something like this should be a start: for n = 1:100 % set a nested for loop factorials = 1; % this needs to be reset insi...

5 månader ago | 0

| accepted

Answered

How may one digitize a curve from an image

These two answers are relevant and contain links to other related answers. https://www.mathworks.com/matlabcentral/answers/16...

How may one digitize a curve from an image

These two answers are relevant and contain links to other related answers. https://www.mathworks.com/matlabcentral/answers/16...

5 månader ago | 1

| accepted