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mmColorTarget v2.0
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9.0, 8.0, 7.0 or later
21 May 2016
3789
Useful Nukepedia Tool #8. Explore this video: 
Usage:
- Make sure you have Numpy installed, compatible and accessible with your Nuke version. (see Blogpost with additional Information )
- Plug two images showing a MacBeth Colorchecker into the source and target inputs.
- Corner Pin the source and target sampler to its corresponding ColorChecker and adjust the sampler Size
- (Switch inputs using the 'currentView' dropdown)
- Hit the 'Calculate Matrix' Button to get the output ColorMatrix.
Changes v2.0:
- More intutive UI with callbacks
- Fixed a problem introduced in Nuke 9.0v8 that broke the entire functionality
- The reference target now comes with a dynamic colorspace selection instead of fixed sRGB Values. (generously provided by Thomas Mansencal at colour-science.org)
- Additional sampling method 'no clip' (EXPERIMENTAL!)
- More stability due to no more expression-based-sampling in the background
Tested successfully on Windows 7/10 (Nuke7/8/9) and CentOS 6/7 (Nuke7/8/9/10b)
Mac Users: The Gizmo should also work on Mac, but you need to find/compile a compatible version of numpy yourself, since i don't have a Mac. Please help me out be sharing your information on this.
Comments
Thanks
Daniel
the other way would be to add the following to your init.py file:
import sys
sys.path.append("/Library/Pytho n/2.7/site-pack ages")
It's still possible that you'll get an error if the compiler version doesn't match, which is the point where i can't help any further, since I didn't get enough feedback from Mac users yet. But it should at least find the module now and tell you what's going on.
I hope it helps, and please share your information if you suceeed.
Marco
I've found the NumPy installer (1.6.1) for Python 2.7 for Mac. I'm running a mac osx 10.6.3 with NukeX 8.0.3.
http://stackoverflow.com/questions/7338051/install-numpy-on-mac-os-x-lion-10-7
It works fine with osx 10.6
I've checked in the OSx command line if the package got installed and yes, it worked and found all the files
I found the folders inside "/Library/Pytho n/2.7/site-pack ages" and copied to: .nuke/Framework s/Python.framew ork/Versions/2, 7/lib/python2.7 /site-packages" I'v copied there the numpy folder.
When I load the gizmo, it works well but when I try to calculate the matrix there it appears an error: " .../site-packag es/numpy/core/m ultiarray.so: no matching architecture in universal wrapper "
I've tried importing with the init.py command but it does not work.
import sys
sys.path.append("/Library/Pytho n/2.7/site-pack ages")
Is there any way I can fix it??or I'm doing something wrong..?
I would appreciate any help.
Thanks Marco and amazing gizmo!
- Guillem R.
You might wanna check any of those solutions:
http://stackoverflow.com/questions/4527338/how-to-install-numpy-and-scipy-on-os-x
Have you already tried any of the official installers for osx10.6? For example:
http://sourceforge.net/projects/numpy/files/NumPy/1.7.2/numpy-1.7.2-py2.7-python.org-macosx10.6.dmg/download
Providing google help is really the best i can do right now :(
Very thanks Marco! I've been searching for this for a long time!
I'm the first Mac user to get this working??
I've just added the new site-packages created on the /Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages
Never underestimate google help
Thanks again!!
Well you're not necessarily the first Mac user ever to get it working, but you sure are the first to give me some positive feedback.
So thanks a lot for sharing!
Could you give us a tip for work with spydercheckr 24 without hide 2 rows ( it are inverted in this color card)
Thank you!!
1. It does not manage levels well - I would look at adding an exposure, levels, or some other way of balancing brightness before applying the chart. I fixed that by manually adjusting levels first.
2. It crashes in Nuke 9.0.3. Numpy works in 9 OK - I was able to test it - so something else isn't working.
Thanks again!
Quote:
I found this morning the new video. Thanks for making it. I followed along on OS X 10.11.5 with Nuke 10.0v1 Non-Commercial.
I still can't make it work.
The gizmo is coming with a .json file, is that also belonging in the gizmos folder?
When I hit "calculate" I get the following error:
'NoneType' object has no attribute 'knob'
Did I install it okay? Is there a way to check inside of Nuke?
And what does this error message means?
Thanks in advance,
Best regards
Daniel (toodee)
you are right, in the normal licensed version it works fine.
Thanks.
It would be nice that the Foundry would actually give the user some hints, that a restriction causing an error in the NON-COM. version.
Current problem is:
'NoneType' object has no attribute 'knob'.
It is a Multivariate Linear Regression: https://en.wikipedia.org/wiki/General_linear_model and uses numpy.linalg.ls tsq: https://docs.scipy.org/doc/numpy/reference/generated/numpy.linalg.lstsq.html
One thing that seems to have always some discrepancy when comparing different documentations are the RGB values on the Macbeth chart. For example, here on Nukepdia the values used on mmColorTarget tool are different to the ones of V_ColorRenditio nChart... Also different documents seems to have different information on the normalized values of RGB for the same illuminant:
http://www.babelcolor.com/index_htm_files/RGB%20Coordinates%20of%20the%20Macbeth%20ColorChecker.pdf
https://www.cs.utah.edu/~aek/classes/cs7650/part03.html
http://xritephoto.com/ph_product_overview.aspx?ID=824&Action=Support&SupportID=5159
Can anyone expand on this differences and how / where these values of this tool were obtained?
Absolutely :) As explained in the description they were generated by myself, the file that yielded the value is there: https://github.com/colour-science/colour-nuke/blob/master/colour_nuke/notebooks/mmColorTarget_dependencies.ipynb
They are based on XRite ColorChecker 2005 values as described here: https://github.com/colour-science/colour/blob/cdbffd063b0c44bb32d752b01647137871434851/colour/characterisation/dataset/colour_checkers/chromaticity_coordinates.py#L114-L114
Now colour rendition charts are never produced equal, so it is normal to find discrepancies between them, not only that but there are also differences in the various RGB colourspaces / whitepoints values depending where you source your data.
This reminds me that I should regenerate the Notebook/JSON file with the latest values content from Colour.
Have it working in Nuke 10.5 in Windows 7 at work, I got the numpy build from the link in Marco's blog above
It drops in just fine and functions well. When I save and open the script again i get a slew of "no such knob" errors and the property window looks like an empty node. Any ideas?
Thanks,
Michael
Please do you know what could be the problem?
thank you for this very useful tool.
Is there any way to keep the lumincance untouched? Often I would like to just get it neutrlized without the patches hitting absoloute value (like .18 for middle grey).
Usualy I am going with the "no clip" choice instead of direct, because the direct mode tend to do funky stuff to overbrights. Is this recommended?
Thanks,
Tobi
thank you for this very useful tool.
Is there any way to keep the lumincance untouched? Often I would like to just get it neutrlized without the patches hitting absoloute value (like .18 for middle grey).
Usualy I am going with the "no clip" choice instead of direct, because the direct mode tend to do funky stuff to overbrights. Is this recommended?
Thanks,
Tobi
I've been struggle trying to make it work on windows.
Theres is a step by step installation for this OS?
I just installed gizmo, phyton, numpy; modify init.py
I can bring the node but can't calculate matrix because it says: This gizmo requires the Python module 'NumPy'.Please install it first and make sure Nuke can import it.
But it is installed.
Any help please?
Thanks before hand.
into your ".nuke" directory?
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