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Roger Breton


Last seen: 3 månader ago Active since 2021

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Answered
Camera characterization gives "symetrical results"?
Looks like there was a discrepancy between the RGB data used to train the model and the RGB data used to test the model. It's so...

9 månader ago | 0

Question


Camera characterization gives "symetrical results"?
I downloaded the code from : https://www.mathworks.com/matlabcentral/fileexchange/40640-computational-colour-science-using-matl...

9 månader ago | 1 answer | 0

1

answer

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 ...

11 månader ago | 1 answer | 0

1

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'); % ...

mer än ett år 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 ...

mer än ett år ago | 0 answers | 0

0

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...

mer än ett år ago | 1 answer | 0

1

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, ...

mer än ett år 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 ...

mer än ett år 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...

mer än ett år 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", ...

mer än ett år ago | 1 answer | 0

1

answer

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 ...

mer än ett år ago | 0 answers | 0

0

answers

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...

nästan 2 år 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...

mer än 2 år ago | 1 answer | 0

1

answer

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...

mer än 2 år ago | 1 answer | 0

1

answer

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, ...

mer än 2 år 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...

ungefär 3 år 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 ...

mer än 3 år 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...

mer än 3 år 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...

mer än 3 år 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'...

mer än 3 år ago | 0 answers | 0

0

answers

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...

mer än 3 år 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...

mer än 3 år 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...

mer än 3 år 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...

mer än 3 år ago | 1 answer | 0

1

answer

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...

mer än 3 år 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 ...

mer än 3 år 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...

mer än 3 år 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...

mer än 3 år 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...

mer än 3 år 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...

mer än 3 år ago | 1 answer | 0

1

answer

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