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Roger Breton


Last seen: 9 days ago |  Active since 2021

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Question


Scaling XYZ 3D data linearly
I am in the pursuit of "simulating" the readings of a spectrophometer equipped with a polarizing filter. I start with a printed ...

10 days ago | 1 answer | 0

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answer

Question


Getting screen resolution on Windows 11
Are there other functions I can use to get the monitor resolution on Windows 11? I use this code: set(0, 'units', 'pixels'); % ...

6 months ago | 1 answer | 1

1

answer

Question


appDesigner and ButtonDownFn does not work?
Documentation states that any Matlab object can respond to click events provided they meet certain conditions. Capturing Mouse ...

6 months ago | 0 answers | 0

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answers

Question


How can I show where an image was clicked from a scatter3 plot?
I created a small app using appDesigner: It allows loading an RGB image and displaying a CIE Lab scatter plot in 3D. I attach...

6 months ago | 1 answer | 0

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answer

Question


Better "probabilities"?
I created a small script in which I present two random colors to the user. See attached script. As you can see, on the left, ...

7 months ago | 1 answer | 1

1

answer

Question


Unable to display uicontrol within a given panel?
I figure I split my figure width in two uipanels, in the hope of having better control over my components, in a script (Soon, I ...

9 months ago | 1 answer | 0

1

answer

Question


Need help with Tooltip display?
I have a script that plots CIE Lab values in 3D: Works great. But as you can see, the tooltip displays the XYZ value. Instea...

9 months ago | 1 answer | 0

1

answer

Question


Custom RGB color space
I am plottiing the measured Lab colors of a ColorChecker SG chart in 3D as you can see below: To obtain the "gamut surface", ...

9 months ago | 1 answer | 0

1

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Question


ColorChecker function does not work?
I am trying to follow the example here: Comparison of Auto White Balance Algorithms - MATLAB & Simulink (mathworks.com) I use ...

10 months ago | 0 answers | 0

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Answered
No 'CData' property on bar graph
Does not work for me? I use: data = [1 2 3 4]; figure BarMatrix = [1 2 3 4]; b = bar(BarMatrix,1,'LineStyle','none'); CDa...

11 months ago | 0

Question


Unable to combine plots?
I created a monster of a script which satisfies my research needs for the moments but I am struggling with the subplots. You wi...

1 year ago | 1 answer | 0

1

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Question


Can Subplots have own colormaps?
I must be missing something obvious.. but I can get each subplots colorbars to plot with its own colormap? Here is my code: RGB...

1 year ago | 1 answer | 0

1

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Question


Extract the "overall colors" of an image to apply another?
I've been meaning to show my students a way to "borrow" the color palette of an image to apply to another? Take the Mona Lisa, ...

1 year ago | 3 answers | 0

3

answers

Question


How to apply color to histograms?
My goal is to analyze RGB images based on Chroma and Hue. For this purpose, I first convert from RGB to CIE Lab, and then from C...

2 years ago | 2 answers | 0

2

answers

Question


Rearrange matrix terms is a challenge
I am not finding exactly the right parameters to rearrange the terms of a matrix? It starts off as an RGB image I later convert ...

2 years ago | 1 answer | 0

1

answer

Question


How do I add "color" to an image?
I'm looking for ways to better understand color mixing theory. Suppose I start of an RGB image? Suppose I want to color the whol...

2 years ago | 1 answer | 0

1

answer

Question


Is it possible to "move" points in 3D?
I have this scatter3 graph, I'm generating from CIE Lab coordinates : Would it be too far-fetch to be able to select any poin...

2 years ago | 1 answer | 0

1

answer

Question


Writing ICC profiles capbilities: can we save modified tags or is it limited to saving header only?
I am thinking about "editing" CMYK output profiles with Matlab. As you know, an output profile starts with a series of 'device'...

2 years ago | 0 answers | 0

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Answered
Fix out-of-gamut RGB colors
I think I found a solution, alhough it is not elegant... : rawRGB = lab2rgb(Lab,'WhitePoint','d50') TempR = rawRGB(:,1...

2 years ago | 0

Question


Fix out-of-gamut RGB colors
I'm going in circle... I have this code, which converts from Lab to RGB : rawRGB = lab2rgb(Lab,'WhitePoint','d50') Trouble i...

2 years ago | 2 answers | 0

2

answers

Answered
Why are there two different "D50" white points? CIE vs ICC?
Got hold of CIE Publication 15.2:2004 and on Table T3, page 35, D50 is listed as 96.42 100.00 82.51. A fresh search in my stock...

2 years ago | 0

Question


Why are there two different "D50" white points? CIE vs ICC?
I have this code going : wp_D50 = whitepoint('d50') % 0.9642 1.0000 0.8251 wp_D65 = whitepoint('d65') % 0.9505 1.00...

2 years ago | 1 answer | 0

1

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Question


How do I get rid of custom data tip?
I have this script which adds a custom data tip to my scatter3 graph : function txt = displayCoordinates(~, info) global...

2 years ago | 1 answer | 0

1

answer

Answered
Searching through table using compound condition
It worked! Sorry for the newbie question. I'm sure there are far more elegant ways to do search a table for information... Will ...

2 years ago | 0

Question


Searching through table using compound condition
I would leke to add a Munsell Notation readout capability to my script. Right now, when the student clicks a point in scatter3 g...

2 years ago | 1 answer | 0

1

answer

Question


Unable to control floating point display?
I have this result : There should be three Lab numbers on the third line but only L and a are showing, with two decimals of p...

2 years ago | 2 answers | 0

2

answers

Answered
How could I display a "circle at the bottom of the figure? And color it along the way? To show Hue angles?
A final note. This project is far from over. It's getting all kinds of suggestions and usecases (by me). I enclose the code, if...

2 years ago | 0

Question


Trouble with custom data tip function (event)
I am puzzled? I try to have a line drawn during the call to a custom text data tip function. Here is the "normal" response, whe...

2 years ago | 1 answer | 0

1

answer

Answered
How could I display a "circle at the bottom of the figure? And color it along the way? To show Hue angles?
I integrated the function into my script and it works like a charm. I may reduce the number of points from 1000 to 500 to speed ...

2 years ago | 0

Question


How could I display a "circle at the bottom of the figure? And color it along the way? To show Hue angles?
Crazy idea. I know Matlab is calling OpenGL under the hood but I would not know how to go about adding these two pieces of geome...

2 years ago | 6 answers | 0

6

answers

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