Any FOSS for creating chromaticity diagrams from a photo?

Software
1

I need it to win an argument on the internet.

Also, just having the ability to view the chromaticity diagram of your photo in an editor might be useful.

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2

Is the “chromaticity diagram” the same as the chromaticity histogram? Because RT can do that.

3

No, I want the diagrams like these:

image
image819×504 350 KB

taken from the DPreview D2X review.

4

Maybe using some package for the R statistical software?

5

R would also be my first guess

As usual the R packages are a bit complicated with the exact formatting of the input data. “Good luck, we’re all counting on you!” :wink:

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6

Good find! Reading this pavo vignette, it looks like this package alone can load images directly and do the color analyses. In this case, there should be no problem with trying to get the data in the right format.

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7

Would be fun if you could move the triangle and white point around and see the image change accordingly.

FOSS devs: make it so.

https://youtu.be/FaLyasJPyUU

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8

:+1:

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9

This type of display would be very close (well at least somehow similar) to a vectorscope. I would argue that an implementation of that with an optional ‘perceptually uniform chromaticity’ would not only be very helpful but very unique!
I’ve only once seen a program attempt this…maybe I can find it for demo purposes.

Found it!
http://www.m2port.com/cateye.html
I liked the LSH vectorscope… :innocent:

10

Perhaps move this to the #software:gmic category? wink @David_Tschumperle wink wink

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11

Maybe https://gmic.eu/reference.shtml#cie1931

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