Green Hair

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Green Hair

Post  Flesh on Sun Sep 11, 2011 1:28 am

I purchased the Canon M40; after reading all the reviews and advise; this one was in my budget.

I'm still playing with the lights; I have Green in my hair; my light setup is as follows:
#4 - 48" Shop lights with two 32 watt bulbs. I have the green screen boxed in with the lights just out of view.
#1 - 32x36" Softbox with #4 85watt CFL (300w equivalent) and a sheer polyester as a defuser; home made. Sits in front of camera, out of view; back is dark; so the camera doesn't see the light directly; its aimed at me.
#1 - 24" SAD box light; the kind used to treat Seasonal Disorder; so its full spectrum; 10,000 lux bio-light.com; I have this facing up; so it lights the Green Screen and my back.
#1 - 85 watt CFL for lighting the side of me.
My Green Screen is one from Tube and Tape, that Mark recommended.
I have to go all Florescent; my room is 10x10' and Halogen is way to hot; and I know I can not get back far enough from the Green Screen and so I have some spill over.

I'm thinking about getting two of these lights: Husky 65-Watt Fluorescent Work Light
http://www.homedepot.com/Electrical-Electrical-Tools-Accessories-Work-Lights/Husky/h_d1/N-bm8pZrdZ5yc1v/R-202071332/h_d2/ProductDisplay?langId=-1&storeId=10051&catalogId=10053

and putting Magenta Gel Filters in front of them
Something like this:

http://www.bulbtronics.com/Search-The-WareHouse/ProductDetail.aspx?sid=0010326&pid=GLLE795SHEET&utm_source=GoogleBase&utm_medium=ProductListing&utm_campaign=GoogleProductSearch&AspxAutoDetectCookieSupport=1

I'm using Gimp on stills right now; but I'll do video and use Blender; Ubuntu Studio is my OS.
I have played with Bluebox in Gimp; I took a magenta colored tee shirt and put it in front of a light, it seemed to do the trick.

My problem is I have Gray to White Hair, I'm over 50, and Blue eyes, and I'm White; I mean whiter then most, and have skin issues; basil cell cancer from the Gulf War, Depleted Uranium does wonders for the skin; so did the desert sun; so I'll have to cover it with makeup; a though was to put something in my hair, like a magenta gel; I have heard of products like this; but don't know where to get it; but its an idea.

I did learn that cheap lights lead to many problems; the shop lights are not bright enough; but the SAD box balanced it out; but that's not a cheap light; just one I already had; also the spectrum of light, the temperature and luminous; where all things I didn't pay enough attention to; you get what you pay for.

Do you think this will work?
Any thoughts would help.

Flesh

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Re: Green Hair

Post  SonicOrbStudios on Sun Sep 11, 2011 10:50 am

White hair and a green screen key should not clash too much, if at all.
I suggest learning how to use and read Zebra Stripes on your camcorder. This will allow you to properly expose the image and you won't get any blown out parts which are really hard to key out.
I also tend to use a choke effect in Premiere or After Effects when keying. As for as Photoshop, you can contract the mask.

As far as Gimp and other Linux based software, I'm clueless as I don't use that operating system. With video and photo, it's mostly Windows and Mac users out there. I'm hoping someone will jump in and help out some more on this subject.

You also may want to try asking some questions at http://forums.dvdoctor.net/ This is a much more active forum and there are always people there to answer questions.

Mixing color temperature lights can in the end make a harder set to key out but if you try to use the same color temperature lights just for the green screen and use the other set of lights for the subject in front of the screen, you should be fine. A colored back light for the subject not only will help out a little more but also makes for a more professional look in most cases.

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Zebra Stripes

Post  Flesh on Sun Sep 11, 2011 3:13 pm

The Canon M40 doesn't have the Zebra Stripes feature; the M41 has a view finder but I didn't find it has this feature either; is there any other feature you know about that can help?

Is there a way to properly expose the image without the use of the Zebra Strips feature?

Does White balance help?

Is there a way to color correct for this?

I know that 4 to 6' from the Green Screen can cause spillage; that is what I have, and as you pointed out; it might be the software, and Windows is not an option for me, so I'll look for help in the Gimp community for that, they are Windows and Linux users alike.

Thanks; this helped.

Update:
My Avatar shows the image I'm trying to work with; I did this one by hand; it was shot outside and not on a green screen; and not on the Canon M40; which I really like; but now that I know about Zebra Strips, I wish I had that feature.



Last edited by Flesh on Sun Sep 11, 2011 5:03 pm; edited 1 time in total (Reason for editing : Update)

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Re: Green Hair

Post  SonicOrbStudios on Mon Sep 12, 2011 12:07 am

Zebra stripes are a great thing to have but yea I guess not all camcorders have this feature, I expected most of the mid to high end Vixias to have this though...but oh well.

You will just have to learn how to expose by looking at the screen itself on cam or an external monitor. Usually the monitor makes things look much brighter than they really are and so you'll learn this with time comparing what you see on screen and what you see when you put it on the computer to view and edit.

Over exposing will cause lack of detail and so it's best to try and set it correctly from the start. Another thing is you can adjust gain levels and such in post production to an extent but usually doing this in post will cause more grain in the image.

White balance is by far a good thing to keep on manual mode or a preset if you can use one. When mixing different light types, I used to set WB for the lights on the subject and not my green screen. As long as the light is even on the screen, the color of it should not matter all that much.

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Re: Green Hair

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