Community Profile

# DGM

Last seen: Today Active since 2015

Hi, I'm nobody. I don't belong here, but I have nothing better to do. Matlab used to be part of my work. Now it's part of my hobbies. That's pretty sad, really. Since the IT clowns hosed the mail server config, I only check my email once every month or two. If you're sending me questions about the forum, you won't get an answer. If you're sending me questions about my own FEX submissions, feel free, but accept the likely delay. Alternatively, ask a question on the forum and @DGM me so I'll get notified.

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A 'multiply' blend is one of the simple and fundamental kinds of image blending. If you have appropriate images to begin with a...

11 hours ago | 0

delete an element from string
How do you intend to identify the thing you want to delete? Do you simply want to delete the second string in the array? str...

13 hours ago | 1

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help on graph (w/o common matrix plotting built-in functions)
In the spirit of ridiculousness, here is my attempt: % random binary data data = randi([0 1],10,10) data = 1 1 ...

23 hours ago | 0

how to convert rgb to hsi
MATLAB has no tools for HSI or HSL. There are tools on the File Exchange. The ones I use are here: https://www.mathworks.com/...

1 day ago | 0

How to find mean Hue and mean Saturation of an HSI image not HSV image?
MATLAB has no tools for HSI or HSL. There are tools on the File Exchange. The ones I use are here: https://www.mathworks.com/...

1 day ago | 0

Highlighting a Region of interest and getting the average Hue value ?
Taking the mean of hues is not as simple as described, and it's likely an unnecessary complication. H is a circular continuum. ...

1 day ago | 0

row that increases more every element
Here's my guess: A = randi([10 20], 1,10) B = cumsum(A) % cumulative sum of A

1 day ago | 0

extracting mean pixel value from an image
This might be a start, but bear in mind how fragile this will be if the colors change or the swatch becomes rotated or something...

2 days ago | 1

As for creating a mask with multiple circular regions, you can use the ROI tools. You could do this interactively something l...

2 days ago | 0

How to change white on the outside to black?
Some of the objects are connected to the surrounding white blob. You'll need to deal with that. You might be able to do someth...

2 days ago | 0

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Can I convert shades of red (Pink, Red, Maroon) in this RGB image to one single color, lets say blue?
Greetings from the distant future. Since the question leaves some details unknown and OP likely no longer needs the answer, I'm...

3 days ago | 0

Invert even and odd columns in an image
Depends what you need. "Inverting even and odd column positions" might be interpreted a few different ways. By simply doing a ...

3 days ago | 1

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Apply Average Filter on Image with just next-before 5 columns
Consider the example: % a simple test image with a single white pixel in the center inpict = zeros(13); inpict(7,7) = 1; %...

3 days ago | 1

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How to remove the white background blobs touching the border of the image?
I don't know why you have a big white border on your image, or why your binarized image is uint8 RGB -- or why the apparent pixe...

3 days ago | 0

App Designer change colormap
I'm going to guess it's complaining about the missing handle on the gray2 line. If so, then do this: gray2 = flipud(gray(256))...

3 days ago | 0

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Editing Legend Items for hatchfill2

3 days ago | 0

legend line colors don't change
You need to give the line object handles to legend() to be sure it's picking the right objects. % THE APPLICATION: THIS IS NO...

3 days ago | 0

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Using imread and plot grayscale image
Tools like imshow(), image(), imagesc() will display single-channel (grayscale) images with the current colormap. In your case,...

4 days ago | 1

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what percentage of reduction in image size resulting from switching from the YCvCr colour space to RGB ?
If we're talking about "size" as in geometry (i.e. number of pixel elements), then if the YCbCr is not downsampled, then the ima...

4 days ago | 1

How do I remove the spaces between concatenated images. they are too wide but i want the image to appear as 1 after concatenation
Depending on what your needs are, you can use montage(), imtile(), or something else. Instead of trying to display images one a...

5 days ago | 0

How can I represent points and lines in 3 dimensions?
Either move the hold on statement after the first call to plot3(), or issue a view(3) command after plotting. Creating a pi...

6 days ago | 1

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How to scan matrix in spiral way?
There is a demo function that can generate NxN arrays in an outward spiral. That could be used (with some arithmetic and flips/...

6 days ago | 0

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can someone help me with dithering ? I'm trying to do random dithering, I want to do halftone and pattern too, but I'm stuck at random
I don't know what your setPixel() and getPixel() functions are, or why you're incrementing a counter variable that's apparently ...

6 days ago | 0

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hi ,I processed images on a folder. Now I want to save all the processed photos in the folder, but only the last photo is saved, what should I do?
Considering that there's missing code and open scopes, we're left to guess whether anything is inside of a loop or not. Either ...

7 days ago | 1

How can I overlap two images/pictures in Matlab?
There's an awful lot of traffic on this question. I don't know that passers-by actually have the same intent, but let's assume ...

7 days ago | 0

How to crop image by specific size and location ?
The rect parameter given to imcrop is [xoffset yoffset xwidth ywidth] I = imread('https://www.mathworks.com/matlabcentral/answe...

9 days ago | 0

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Hi, can i know how to find the orientation of an object?
Well, here's this. It's not robust, but then again, the test image isn't a real process image either, so I'm going to consider ...

9 days ago | 0

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How to make subplot size bigger?
Disregarding subplot arrangement, the edges are obscuring the faces due to the mesh resolution. figure colormap(parula(256))...

9 days ago | 0

Combine masked images into one, with each mask having a unique color.
If those would work for you, then you might also consider something like these: % do a simple mean of colored frames % a set...

9 days ago | 0

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