DGM

Last seen: Today | Active since 2015

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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.

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Answered
How to create a custom colormap ("seismic" from python)
Without relying on any external python dependencies, here is an adequately accurate approximation. n = 256; % specify the len...

4 dagen ago | 0

Answered
how to fuse image
I've posted other answers regarding "fusion". While it's a vague question, a fixed 50% weighted mean (the only "blend" imfuse()...

5 dagen ago | 0

Answered
Save indexed image as RGB
This doesn't look like you're using indexed-color images. It looks like you're trying to create RGB pseudocolored representatio...

11 dagen ago | 1

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Answered
How can I load a portion of a .tif file using readgeoraster?
As far as Joshua and the documentation suggest, the accepted answer is nonsense, but I can't demonstrate it specifically with a ...

11 dagen ago | 0

Answered
Delay in Plotting Next Overlaid Plot When Animating 2D Plot
You're creating a new high-level graphics object for each plot() call. That gets very expensive, and everything will just keep ...

14 dagen ago | 1

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Answered
Why do I write as Ib(1:478,31:565)(~BW) = 255
There are various ways, including expanding the mask, or using more purpose-built tools, but if you're trying to apply an unders...

14 dagen ago | 0

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Answered
How to remove 'zeros 0' from histogram so it will not affect imhistmatchn?
I'm going to guess at what's going on here. I'm assuming you're doing something like this: % a single-channel image and a logi...

ongeveer 2 maanden ago | 0

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Answered
How to fill a large hole?
I don't have the original image, but I'm going to assume that your image is RGB. Use im2gray() to make sure that the incoming i...

ongeveer 2 maanden ago | 1

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Answered
Extract individual curve from a multiple curve plot
This is the garbage I put together. It could stand to be cleaned up, but it still has problems. It seems to sort data and fill...

ongeveer 2 maanden ago | 0

Answered
Extract individual curve from a multiple curve plot
This is probably fragile and overcomplicated, but eh. % the data load data.mat x = data(:,1); y = data(:,2); %scatter(x,y,'...

2 maanden ago | 0

Answered
Drawing bounding box onto an image without imshow and hold on ...
Just because I felt like doing it my way. % any image inpict = imread('peppers.png'); % some 2D logical mask of the same p...

2 maanden ago | 0

Answered
How can I change each pixel value in a cluster using k-means algorithm to different colors
Create a label array from the segmentation. Create a color table associating each label to a desired color -- either the mean c...

2 maanden ago | 0

Answered
how to crop a binary mask to remove all black pixels while maintaining the largest area of white pixels?
Using this tool from the FEX: https://www.mathworks.com/matlabcentral/fileexchange/71491-largest-inscribed-rectangle-square-or-...

3 maanden ago | 0

Answered
how to crop a binary mask to remove all black pixels while maintaining the largest area of white pixels?
Another way. This is essentially the same as Walter's example, but it's rolled up as a convenient function. It can crop simple...

3 maanden ago | 0

Answered
How to give Gray color histogram gray shade instead of blue
I slightly disagree with using the bar/stem colors to denote the color represented by each channel. It's nice to color-code thi...

3 maanden ago | 1

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Answered
Analyze intensity of a specific region.
If you just want basic color statistics within a region: % a color image inpict = imread('image.jpeg'); % reduce it to some...

3 maanden ago | 0

Answered
How to map each pixel in the image from the colour bar and assign temperature to the pixel from the colour bar
There are now quite a few examples of this on the forum. Here's another. % the image inpict = imread('image.jpeg'); imshow(i...

3 maanden ago | 0

Answered
How to count the amount of small squares in this picture?
The given answers have problems with accuracy. One way to help with discrimination is to do some sort of template matching. ...

3 maanden ago | 1

| accepted

Answered
How to randomly select the datapoints in a vector based on percentage for each group?
There has to be a smarter way than this, but I guess this is one idea. % some fake data x = randn(1000,1); % the percentile...

3 maanden ago | 0

Answered
Digital image processing.
It's not clear what is expected by rotating an image without changing its size or resolution. What does "size" mean in this con...

3 maanden ago | 0

Answered
Error in computing median filter and histogram equalization on an image. How can i solve it?
The image is a JPG, and most JPGs are RGB. fname = 'https://www.mathworks.com/matlabcentral/answers/uploaded_files/280425/1a.jp...

3 maanden ago | 0

Answered
how to remove error ??? Error using ==> iptcheckinput Function MEDFILT2 expected its first input, A, to be two-dimensional. Error in ==> medfilt2>parse_inputs at 109 iptcheckinput(a, {'numeric','logical'}, {'2d','real'}, mfilename, 'A', 1); Error i
The image is a JPG. Most JPGs are RGB. Medfilt2() only accepts a single-channel input. You either need to make the input sing...

3 maanden ago | 0

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Answered
How can we apply a gaussian noise to a image?
If you want to add Gaussian noise to an image, just use imnoise(). That way, there's no need to jump through extra hoops to deal...

3 maanden ago | 0

Answered
How do i zoom imhist?
I see two potential needs here. Scaling YLim and possibly scaling XLim Adjusting YLim: The most common is probably a need t...

3 maanden ago | 0

Answered
How to create axes in the center of an image and calculate angles between the points in an image?
There's no need to use manual transcription of a plot. Use the points that have already been found. Here is a hypothetical rec...

3 maanden ago | 0

Answered
Average distance between nearest neighbors of grain boundaries
Maybe a start, maybe not: % the image as a logical mask inpict = imread('unettestfile.png')>128; % if we're not going to fi...

3 maanden ago | 0

Answered
Why does imagesc show different outputs for the same input matrix?
The problem is the ydata spacing is not uniform between the two sets. Tools like image(), imagesc(), and imshow() don't use all...

3 maanden ago | 1

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Answered
Controlling colors in scatter plots
This is what I threw together, but there's probably a better way to do this; I haven't really used gscatter() for anything befo...

3 maanden ago | 0

| accepted

Answered
Big Tiff Grayscale image looks unsharp/ Grayvalue is not shown properly
It's hard to know without seeing the image. A TIFF can contain just about anything. It can be on an odd numeric scale. It can...

4 maanden ago | 0

| accepted

Answered
Are there MATLAB functions or scripts to perform boolean operations on triangulated solids?
If your solids can each be expressed as a manifold STL, then I don't see why you can't use external tools to do the job. I norm...

4 maanden ago | 0

| accepted