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Infrared Full Spectrum OLPF post workflow

O

Oliver collins

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Hi All

So i've bought my self a Kippertie Full spectrum OLPF. i've shot some test that look really cool but i need to work out my post workflow.

If any one has any tips or trick i'd be really greatful.

Also when i load into resolve i get a nice pink image on my Sony PVMA250 grading monitor but a weird yellow mustard looking image on my GUI.

See picture below

http://imgur.com/a/7Y4eC

Any ideas whats going on?

cheers

olli
 
Patrick Tresch said:
That's a test I've done with the Full spectrum OLPF.

Some with the 730 ir and the other with the 830 ir and some without any visible light cut.

https://vimeo.com/222755394

If you cut a lot of visible light 830 you'll mostly get a "bicolor" picture.

Pat
Click to expand...


I'm shooting with the Hoya R72.

i'm trying to get the blue sky with pinkish / white foliage . Philip bloom gets a nice look with a custom lut that swaps the colour channels.

I like this look.
http://joyenergizer.com/33-beautiful-shots-of-infrared-photography/

I'm confused why i'm getting my monitors showing totally different colours in my grading setup? See pic in my post. very strange

Cheers

Olli
 
I went with the 850nm filter on a shoot and pushed everything to black+white with a hard s-curve. Was a really cool look and the hard curve/contrast helps accent the IR.
 
I think anything you're trying to do can actually be done better and more accurately in post. The problem with trying to bake an actual color into the image with an OLPF (or any glass filter) is that the results are going to vary widely depending on exposure.

What happens when you shoot a color chart? Get a DSC One-Shot or a Chroma DuMonde chart and you'll have a better handle on what's happening to the image. I would always rather have clean whites and blacks as a starting point, and then (if necessary) veer away from that depending on the intent of the scene and the context within the project.

I lean pretty heavily on power windows in final color, and a lot of the mood we create hinges on controlling exposure and color in different parts of the image at the same time -- even when the actors move, even when the camera moves. You can't do this with a filter. Experiment in post first.
 
Everytime i've watch the IR effect done in post it looks like it's been done in post. I think doing properly in camera is still the best way to do it. yeah you can do a similar effect in post but it takes a lot of work.

I'm a camera guy more than a VFX colourist so it's an in camera effect for me to get best results.
 
Hello Marc,

Thank you for participating to this topic.

As we are capturing picture that are out of visible spectrum, the dsc chart won't help in looking how things work out as the material filmed reflects the IR light differently than the light we see. Remember the different purple blacks depending on the material used with the prone to IR pollution Mysterium sensors. The skys, clouds, leaves, skins tells me more on how those different filters act. And they are some contrasts and brightness that only full spectrum with some filter combination can achieve. I think...
 
Patrick Tresch said:
As we are capturing picture that are out of visible spectrum, the dsc chart won't help in looking how things work out as the material filmed reflects the IR light differently than the light we see. Remember the different purple blacks depending on the material used with the prone to IR pollution Mysterium sensors. The skys, clouds, leaves, skins tells me more on how those different filters act. And they are some contrasts and brightness that only full spectrum with some filter combination can achieve. I think...
Click to expand...
The o.p.'s question was on OLPFs, not on IR filters. Sure, if you want to shoot with an IR filter, by all means do. But the effects he's talking about -- pink images, yellow images -- are much more drastic than anything you should be seeing, especially if the camera is black-balanced and there's no mixed lighting.

I still say we can fix a lot of this stuff in post and can do it in a way that's subtle and pleasing.
 
Marc, I think you've missed that the OP is using an OLPF specifically designed to allow IR into camera - explicitly giving images that can't be replicated in post.
Oliver, I can't help re: the odd display in the resolve GUI - the grading monitor indeed shows what I'd expect in this usage, and what I presume you saw on camera.
If you want more advice on getting the best out of the full spectrum OLPF, drop me a PM
 
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