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Question

Can I define or change the direction of 'reshape'?
Hi, I have a sample image (below). Generally if I use 'reshape' to change the RGB from n by m by 3 to n*m by 3, the reshape...

8 jours il y a | 1 réponse | 0

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Question

What is the range of L (lightness) when plotting HSL bi-cone colour space?
Hi, I am trying to plot the HSL bi-cone colour space using Matlab. From google search, there are many online HSL images look l...

19 jours il y a | 1 réponse | 0

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Question

What is the code for this cosine symbol?
Hi, How to write the cos-1 in Matlab? Is it to only use 'cosd' or 'cosd' but with some to represent -1? Has anyone seen the co...

20 jours il y a | 1 réponse | 0

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Question

How to generate all the possible data points in this 2D triangle?
Hi, I have a blue triangle in a 2-D V-S space. How can I know the [s v] values of all the possible points within the bl...

22 jours il y a | 1 réponse | 0

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Question

How to know how much I rotated a figure?
Hi, Matlab plotted my data points like this: Then I manually rotated the figure to this: Is there a way to record the...

22 jours il y a | 1 réponse | 0

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Question

When plotting in 3D space, what to do to make 1 unit look the same length on each axis?
Hi, I have a matrix of data points 'xyz' and I plotted them in the 3D X, Y and Z space. Notice that 1 unit on the Z axis (...

24 jours il y a | 1 réponse | 0

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Question

How to read '.webp' image file
Hi, I have a couple of image files in '.webp' format, how to read them in Matlab?

24 jours il y a | 2 réponses | 0

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Question

All the combinations for 3 variables
Hi, I have 3 variables, each of which is an array containing differnet numbers of elements. If I take a simple case as an exam...

26 jours il y a | 1 réponse | 0

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Question

Hue in HSV Color Space
Hi, In the HSV colour space, if I have 4 sample points with hue angle of [0, 90, 180, 270], how can I convert them so that...

26 jours il y a | 1 réponse | 0

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Question

How to generate the hsv cone graph using Matlab?
Hi I saw the hsv cone graph on Mathworks webpage https://uk.mathworks.com/help/images/understanding-color-spaces-and-color-...

30 jours il y a | 1 réponse | 1

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Question

How to apply the white point when converting xyz to upvpl using 'makecform'?
Hi, I have a sample data point with XYZ values shown below. XYZ = [29.5400 25.2800 19.5900]; I would like to convert XY...

environ un mois il y a | 1 réponse | 0

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Question

Determine positions of projected points onto an ellipse
Hi, I have a set of data points (blue dots below) and I woule like to project them onto an ellipse (with known a, b, x0, y0, an...

environ 2 mois il y a | 3 réponses | 0

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Question

Projecting a dataset on an ellipse
Hi, I fit an ellipse (in green) to my dataset (white dots). I'd like to project each data point on the ellipse (or shifting ...

2 mois il y a | 1 réponse | 0

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Question

Can't get the legend right
Hi I plotted a few things on the chromaticity diagram below. h1 to h3 are to plot three black lines, h4 is to plot dataset A,...

2 mois il y a | 1 réponse | 0

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Question

Munsell 100 Hue Test
Hi, Has anyone got the code for the Munsell 100 Hue Test in Matlab?

4 mois il y a | 1 réponse | 0

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Question

How to rotate or mirror the contents in the figure with axes?
Hi, I generated a plot(?) with axes on (see below) but it doesn't look quite right. The above plot maybe classed as gca? ...

4 mois il y a | 1 réponse | 0

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Question

Hi I would like to generate a simple mask image from scratch in Matlab if it is possible. It has the following criteria: t...

4 mois il y a | 1 réponse | 0

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Question

How to know the exact colour after a level of transparency being applied?
Hi, I am filling an area with a specific colour, say [255 0 0 ], but with a level of transparency, say 0.5. So the actually col...

4 mois il y a | 1 réponse | 0

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Question

How to fill a circle with different sized circles
Hi I would like to create something very similar to this with packcircles. All I have is the background colours and foreground...

5 mois il y a | 1 réponse | 0

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Question

Matlab User Interface - how can I fit more script in one line?
Hi there, In the Matlab's script interface, there is a vertical line (see below where the arrow is pointing at) serving as th...

5 mois il y a | 1 réponse | 0

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A répondu
Can anyone please send the superpixel segmentation code used in image processing
https://uk.mathworks.com/matlabcentral/fileexchange/69805-superpixel-based-fast-fcm-for-color-image-segmentation

5 mois il y a | 0

Question

Matlab Online - change of the current folder
Hi, For the online version of the Matlab, how to change the current folder to my local folder?

5 mois il y a | 1 réponse | 0

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Question

Solving the linear equation
Hi, For a simple explanation, an example is 21 = m x 7. m = 21/7 = 3. If I use the m I obtained to time 7, it should be equal t...

8 mois il y a | 2 réponses | 0

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Question

Detect ColorChecker chart in an image
Hi, https://blogs.mathworks.com/steve/2020/09/30/how-to-detect-an-x-rite-colorchecker-chart/ I used the link above for detec...

9 mois il y a | 1 réponse | 0

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Question

When chromaticity diagram meets a line
Hi, I used Matlab to plot a chromaticity diagram, then I plotted a line with a function y=ax+b with known a and b. I am jus...

10 mois il y a | 2 réponses | 0

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Question

How to generate colour blindness confusion lines?
Hi, How are the confusion lines (red lines) generated in the image below?

10 mois il y a | 1 réponse | 0

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Question

box detection/rectangle detection
Hi Here is my sample image. How to automatically grab/crop/know the region of each colour square without using 'get rect' fun...

environ un an il y a | 2 réponses | 0

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Question

Using 'getrect' on the main design window - App Designer
Hi Below is my main design window. As you can see, within the blue box it is an Image Object, not an Axes Object. There is n...

environ un an il y a | 1 réponse | 0

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Question

ButtonDownFunction on an image in App Designer
Hi I haven't really figured out how to use the 'BottonDownFcn' on an image in the new App Designer. Here is what I would li...

environ un an il y a | 1 réponse | 0

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Question

How to display an image within the figure in App Designer?
Hi, I used to work with GUI and I am very new to the 'App Designer'. As you can see here I have created an interface. ...

environ un an il y a | 1 réponse | 0

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