Getting " Yet Another Color Gamut Visualizer" App Working

Hello,

I found an app on File Exchange that does exactly what I'm looking for. it's called "Yet Another Color Gamut Visualizer"

https://www.mathworks.com/matlabcentral/fileexchange/71705-yet-another-color-gamut-visualizer?s_tid=ta_fx_results

I must warn you I'm new to Matlab, and I'm trying to teach myself, I've learned some stuff, but getting this app to work has been challenging

I have a table of CIELAB points, and I want to build a 3D color gamut from them. This app seems to be exactly what I need, but I keep getting errors.

Here's one of the LAB points as an example

L* = 88.25

a* = 17.46

b* = 10.06

The inputs that are stated in the app are GAMUTVIEW(COLORS, DRIVE_VALUES, TYPE)

COLORS = I'm pretty sure this is my list of LAB values, or I could convert these to RGB values

DRIVE_VALUES = I think this would be my LAB values as the actual plot of how it would appear in 3D space

TYPE = I think this would be blank, as I only have LABs and RGB values, and I don't need to convert

This is the error I get all the time, and I don't know what it means

>> gamutview rgb,gamut

Unrecognized function or variable 'setstructfields'.

Error in gamutview>parse (line 224)

p = setstructfields(parser.Results, parser.Unmatched);

Error in gamutview (line 63)

[white_point, patch_properties, parent] = parse(varargin{:});

Any help would be greatly appreciated

Answer 1

[Image Analyst]

I don't know about that particular File Exchangeitem but if you want to look at the gamut of your actual image, you might check out the built-in colorcloud.

Answer 2

[DGM]

That FEX submission uses setstructfields() from the Signal Processing Toolbox.

which setstructfields() -all

/MATLAB/toolbox/signal/sigtools/setstructfields.m

For most practical cases, you can get away with replacing that line with this block of code:

% replace setstructfields() (mostly)
p = parser.Results;
fnames = fieldnames(parser.Unmatched);
for k = 1:numel(fnames)
    p.(fnames{k}) = parser.Unmatched.(fnames{k});
end

That's a bit of a simplification over setstructfields() and won't handle nested struct inputs, but I don't expect there to be a need for passing struct parameters to patch() or anything.

There are also other, complete implementations on GitHub that can be found with a web search.