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Voronoi Gradient v2.7
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11.0, 10.5, 10.0, 9.0, 8.0 or later
Linux, Mac, Windows
28 Oct 2019
674
Nuke implementation for 2D Gradients. Proof of Concept.
Create an arbitrary number of color-samples in 2D and produce a smooth, natural interpolation over the entire image.
The Gizmo uses Natural Neigbor Interpolation to calculate the pixels inbetween samples, using Blinkscripts.
You can also output the underlying Voronoi Diagram or play with the smoothness value to control the amount of the softening (0 = Voronoi Diagram, 1 = Accurate Natural Neighbor Interpolation).
Another important function is the ability to sample input colors, instead of defining them yourself. Setting the Type to 'Sample' uses all created points to sample the input colors at given positions. Furthermore you can use the 'Fill' Type to interpolate missing information in any image. A premultipied input is required for this.
Changing the Colorspace will change the color falloff. This can be used to achieve the best artistic result. Setting the Colorspace to HSV for example, will interpolate the colors over the spectrum.
There are several tricks and hacks used in this Gizmo to make it work, so please report any bugs you find, I am sure there still are some.
The user knobs and the inside of the gizmo are well documented to help with understanding the concept.
(The algorithm implemented is not the elegant geometric process, but a simple brute-force method, which was easy to implement. This however makes the tool super slow and you might wanna use the speed optimization control to make it a little bit faster at the cost of some quality. That's why I would still consider the whole thing a proof of concept. Although, with my update to v2.7 I'd say we are production ready now :) )
Example 1:
Creating the NNI or respective Voronoi Diagram via feature points
Example 2:
Using the Sample Type to generate a cleanplate
Example 3:
Using the Fill Type to fill in missing information (driven by alpha)
Example 4:
Using the Fill Type to generate a cleanplate
Update to 2.7 (2019-10-28)
- Fully reworked feature point value forwading to BlinkScript. For the 4th time. Animation of Feature Points not buggy anymore. (hopefully)
- Minor update to the UI
Update to 2.6 (2019-10-06)
- Fixed a bug that prevented the smoothness setting to be applied to the Fill mode
- Minor Speed Improvements for the Fill mode
- Works now with aspect ratios other than 1
- Updated the description above with more examples
Update to 2.5 (2019-10-05)
- Added gap filling mode
- Fully reworked feature point value forwading to BlinkScript. No point limit anymore.
- Updated a few knob labels, defaults, etc.
Update to 2.4 (2019-09-07)
- Added Smoothness parameter to the NNI
Update to 2.3 (2019-09-07)
- Fixed a GPU related bug in the SetPoints Blinkscript
Update to 2.1 (2019-09-01)
- Fixed a namespace bug
- Added pointcount to the UI
Update to 2.0 (2019-08-31)
- Reworked the core
- Points can be animated now, but this introduced a limit of 50 points for now (100 points broke the Blinkscript)
- the sample functionality is now handled by a blinkscript and not a TCL expression, which makes it more stable
Update to 1.2
- Fixed another Expression I forgot in 1.1
Update to 1.1
- Fixed the string separator declarations for some Expressions from ',' to ,
Comments
Two things though:
-the "to" points shoe up in the viewer but they don't do anything?!
-it'd be great to implement the "Magic Carpet" functionality of sampling the incoming area under the respective point for the colour rather than having to set it manually.
A plugin version of this would be great to make it a bit faster.
The sample functionality is already implemented, just change the Type parameter to Sample :)
What do you mean with "to" points. I expect the viewer to look like the one in the screenshot above.
A plugin would be faster indeed, but the problem lies within the algorithm. My code is short, clean and slow
There is a way faster method to calculate the pixels, but its implementation is really hard, so instead I used the brute-force approach, that scales quadratically with image size. In order to reduce the processing time to less than 1s I added the optimization parameter. If you crank that up it will be a lot faster.
The whole setup is quite experimental and uses a lot of tricks/hacks in different places, I don't even know how it works on another system.
Indeed, it's all there and the "to" points in the viewer was user error.
Awesome, this will be a great supplement for IBK workflows, thanks!
I hope it will be a simple method to generate cleanplates for keying. Right now I am working on a variation of this tool, to fill in missing information (= black alpha) in an image. This is pretty straightforward , but takes even longer to calculate. As long as I don't come up with speed improvements in the Blinkscript itself.
ERROR: VoronoiGradient 1.Expression_Sa mpleColor.temo_ expr0: Unexpected '' in '[sample [node sample_image] red... and so on, I'll attach link to screenshot. www.kalderafx.com/vfx/nukegizmos/voronoigradient/voronoigradient_error_01.jpg
Also it seems that animated points are not properly evaluated, image is not refreshed even when I force-refresh and clear cache.
working with Nuke 10.5
ERROR: VoronoiGradient 1.Expression_Ge nerateColor.tem p_expr3: Nothing named 'Nothing' in '[value this.parent.col or_[lindex [split [value this.parent.poi nts] ,] [frame]].a]'
Warning: VoronoiGradient 1.SampleBlur: [Blur] Abort/cancel checked with no valid trees. This op most likely needs to have its parent set correctly.
ERROR: VoronoiGradient 1.Expression_Sa mpleColor.temp_ expr0: Nothing named 'Nothing' in '[sample [node sample_image] red [value this.parent.pos _[lindex [split [value this.parent.poi nts] ,] [frame]].x] [value this.parent.pos _[lindex [split [value this.parent.poi nts] ,] [frame]].y]] '
If you have any insight in to this error I'd appreciate the help. I'm also happy to send you files.
thanks!
Apart from that, amazing!!
I'm using to try to create a cleanplate of a light on a stage with varying lighting changes, but need to remove some empty seats. Can't seem to get it working to sample per frame.
ERROR: VoronoiGradient .BlinkScript_Se tPoints.SampleP oints_c_5: Nothing is named "Nothing"
ERROR: VoronoiGradient .BlinkScript_Se tPoints.SampleP oints_p_5: Nothing is named "Nothing"
I tested Nuke 8.0 on Win and Nuke 10.1 on Linux so far.
If there is an error with the SetPoints I might need to build in more failsafe checks I guess...
Cheers...
Tested it on 11.4 Centos 7 just now and it works fine. The knob does not evaluate though l, which is probably causing your error. It seems that some workspace configurations are more sensitive than others.
I replaced the whole part where I feed the sample points into the BlinkScript with a completely different and more elegant method.
If I can, I'll try it on a Nuke 11 build and see what happens
I just did an update with some major improvements and animating the points should not be buggy anyore. Tested on Nuke 8.0 on Win and Nuke 10.1 on Centos7, both locally and on th farm.
Would be great to hear if it works for you! :)
I have so many places to use this.
I'm on non comercial Nuke 11 3.5
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