HELP: simple software to project image colours over the CIE 1931 diagram

[Guillermo Luijk]

I cannot fin a simple piece of free software that can do this. Do any in the forum know of a piece of software to achieve this? (Windows OS)

Image bottom right is what I'm looking for:



Thanks!

[Mark D Segal]

Not sure whether it will do exactly this, but have you looked at Chromix ColorThink Pro?

[TonyW]

The only one I know of is as Mark mentioned Color Think Pro (it will plot image data points within CIE diagram) - but it is pretty expensive

While I do not think it will be exactly what you are looking for I wonder if 3D Color Inspector plugin for ImageJ (with a little compositing in PS  ) would be helpful ?

Screen grab


Links
https://imagej.nih.gov/ij/
https://imagej.nih.gov/ij/plugins/color-inspector.html

[TRANTOR]

3D plot within Lab: http://www.colorlab.no/colourlab_old/icc3d
Free of course.

[Guillermo Luijk]

Thank you all. The tool referenced by Tony was fine.

This was a case of study of stage led lights, some forum members indicated overexposure as the problem in this shot:




But the RAW exposure was perfect (only quasi specular lights got clipped):

RAW histogram:


Zooming the highlights to find the dancer:


RAW clipped areas:


Zooming:


RAW red channel, the most exposed:


Conclusion: exposure was perfect.

What was the problem then? these artificial colours are so saturared that sRGB is in sufficient even for a neutral RAW development, ProPhoto RGB does the job:


Displaying colours out of sRGB:


3D vision:


Regards!

www.guillermoluijk.com