Introduction: How to Green Screen (ChromaKey ) With Photography !

In this video we discuss chromakey (green screen) for digital photography. We cover green screen studio setup for digital photography and how to edit using one of the powerful green screen software programs on the market.

This is a short video of the full version. IN the full version we also cover more setup techniques and cover how to edit using adobe Photoshop CS. To take a look at the dvd go to the links below:
http://www.tubetape.com
http://www.markapsolon.com

Comments

author
ajs1313 (author)2011-08-23

excellent walk through. Thank you.

author
gtoal (author)2011-08-17

In the video Mark goes to the bother of explaining that your lighting should match the scene, but the final picture seems to have the shadows on the girl going the opposite way to the shadows on the Parthenon! It wouldn't be a problem for a quick 'ible posting except that he says it looks great :-)

However - I'm not posting to quibble - I'm posting with a tip for what to do in this situation. Try reversing the image of the person! It's much harder to spot a hair parting on the wrong side of someone you don't know than it is to spot a shadow falling the wrong way :-)

regards,

G

author
filmnuts (author)2009-11-02

While it is easy to quickly change an image's background with a chroma key (not chromakey), it takes a long time to create a lighting setup that will key as easily as the one you use in your video.  With programs like Photoshop, it is much faster to just take any picture, regardless of its background, and use a selection tool to isolate part of the image and replace the background.  The whole process, from placing the first light to finishing the image will be significantly shorter if you don't use a chroma key and you will have the added benefit of not being limited in your use of the original image.

Chroma keys are really only used in the film and video world, where it would be too time consuming to individually edit each frame of film or video (remember there are 24 fps in film and 30 fps in NTSC video) and remove and/or change the background.  In this situation it is much faster to take the time during production to use a green or blue screen.

Also, in your example, the talent is blocked much too close to the green screen.  If she were wearing a white or light-colored shirt, you would clearly be able to see a green hue to her shirt in the original photograph.  When doing a key, this would cause her clothes to become opaque and look like a ghost.  The green screen and the talent should always been lit entirely separately and the talent blocked at least 15 feet from the screen.

Also, the majority of this video seems to just be a plug for the software you're using and a way to increase traffic to your website.

author
Treknology (author)filmnuts2011-07-10

Firstly, it is not "Chroma Key" or "Green Screen"----It is "Color Separation Overlay". Chroma Key is a trademark.

Unless you want your camera angles changing much, most modern software doesn't require a CSO background. Take a shot of the background and without moving the camera insert the subject and take a second photo.

Photo 1: Empty background
Photo 2: Background plus subject
Photo 3: Substitute background

Whilst re-rendering photo 2, most software can recognise images from photo 1 and replace them with images from photo 3, effectively moving Photo 2's subject to a new location.

As filmnuts says, for a single image CSO is completely unnecessary, and even in video unless you need tracking you can also cheat your way out of it.

author
caribooharry (author)filmnuts2010-05-13

Where is Filmnuts Instructible on this subject of is he just a 'critic sniper'?

author
garry15 (author)2011-03-15

Useful tips regarding Green Screen Photography

author
ultraphil (author)2010-11-27

Problem is caibooharry...Filmnuts is 100% correct and his comment has added great value to this "ible".

author
filmnuts (author)ultraphil2011-03-03

Thanks for backing me up on this.

author
ultraphil (author)filmnuts2011-03-04

NP. The Truth is the truth

author
Ngendrer (author)2010-07-09

very usefull info, thank you, just what bother me a little bit is at the final image the light sources are opposite. what about using the AG flash Difuser ? It doesn't make any shadows......

About This Instructable

30,847views

44favorites

Bio: Video guru- Mark Apsolon is a man on a mission to show everyone that is interested in doing video production and film making how to ... More »
More by markapsolon:Video Tips & Tricks ep14: How to create a logo and video bugVideo Tips & Tricks ep11: How to make a great movie! 12 stages of the Hero's Journey!How to Green Screen (ChromaKey ) with Photography !
Add instructable to: