Broadcast and high end consumer cameras cameras use three independent sensors, one for each primary color-- Red, Green and Blue. Blue is the complementary color to flesh tone--since the most common color in most scenes is flesh tone, the opposite color is the logical choice to avoid conflicts. The background video is fed into the keyer. Blue screen composites can be made optically for still photos or movies, with dedicated real time hardware for live video, and digitally using software to composite still and motion images. his comment is here
Since then the vogue has shifted to calling it "green screen". Red, green and blue channels have all been used, but blue has been favored for several reasons. You don’t want to shoot on a blue screen if there’s a blue object in your scene, and thesame goes for green. Return to top of page. http://www.chromawall.com/blog//chroma-key-blue
Hair, shoes and shadow areas may be very dark, while eyes, skin highlights and shirt collars can approach 100% white. Some of the best modern Special Effects Generator Switchers from Grass Valley Group, Sony, and others can create composites rivaling the performance of a dedicated Ultimatte unit. (Though they are not Also, video cameras are usually most sensitive in the green channel, and often have the least noise in that channel. You’ll be stuck with afloating head as your main character and likely that’s not what you’re looking for, unless you’retrying to be a silly weatherman.
A disadvantage is that green spill is almost always objectionable and obvious even in small amounts, while blue can sometimes slip by unnoticed. Green paint has greater reflectance than blue paint, which can make matting easier. With an Ultimatte unit it is possible to create composites that include smoke, transparent objects, different shades of blue, and shadows. Green Screen Backgrounds Green has its own advantages, beyond the obvious one of greater flexibility in matting with blue foreground objects.
Until the the 1990s most blue screen compositing for films was done optically, and all television composites were done using analog real time hardware. Other pages by me that may be of interest: Lenses And Lights, my blog of tutorials, tips and techniques, for film and video, cameras and lighting. Sometimes (usually) the background color reflects onto the foreground talent creating a slight blue tinge around the edges. Becausegetting a perfect key in post production is very difficult for even the pros and in a daytime shotany edges of leftover green will be far less noticeable.
Related Posts17 Tips from the Industry and Creator Tracks at VidCon 2016 Andy SmithJune 28, 2016How Your B2B Business Can Get Real Long-Tail Value From YouTube Dane GoldenJune 9, 2016Top 7 How To Use A Green Screen Primatte sells a chroma key plugin for Photoshop, Aftereffects, Combustion and other imaging programs. As keyers became more sophisticated, with finer control of the transition between background and foreground, the effect became less obvious and jarring. Historically, cameras and film have been most sensitive to blue light, although this is less true today.
We're listening!Want to chime in on this article? Discover More The Blue / Green Screen Page Welcome to the world of Blue Screen / Green Screen compositing! What Is A Green Screen The same goes for night and a bluescreen. Green Screen Vs Blue Screen Once the exclusive domain of Hollywood special effects artists, blue screen compositing expanded to include video and computer imaging.
So you watched some behind the scenes footage from a Hollywood blockbuster and you noticed thegigantic blue or green walls they film against. http://webamplayer.com/green-screen/blue-screen-chroma.html You may already know that they do this so they caneasily remove the color in post production and superimpose the characters onto a differentALSO ► Donald Trump Knows How to Promote, Traditionally, a single camera was used as the Chroma Key camera. This is known as blue spill. Chroma Key Green Screen
The level control knob on the keyer is adjusted to cause all the black on the title card to be replaced by the background video. In a luminance key, everything in the image over (or under) a set brightness level is "keyed" out and replaced by either another image, or a color from a color generator. You can get around this a little, but stick with this rule ofthumb for now since you’re just getting started: If there’s blue in the scene, shoot on green.Easy peasy. weblink The Art and Science of Digital Compositing by Ron Brinkmann Another interesting book is Digital Compositing in Depth by Doug Kelly.
This creates a problem on three camera sets; the other cameras can see the blue screen. Green Screen Material CreatorsMore Reel VideosDonald Trump Knows How to Promote, But Not on YouTubeBuzzFeed: YouTube Channel Review - Through the 'Reel' WringerPewDiePie: YouTube Channel Review - Through the 'Reel' WringerShure: YouTube Channel Review This works, sort of, but soon manufacturers created dedicated chromakeyers that could accept all 3 colors, plus the background composite signal, and the foreground composite signal.
Top Online Video Creators Across Social: October 2016 OK Go Slows Down ‘The One Moment’ for Morton Salt’s #GivingTuesday YouTube Channel Rankings - Most Popular YouTube Creators October 2016 Popular Top There are many mysteries to the succesful execution of a blue screen composite and considerable confusion as to what a blue screen composite is. A more sophisticated television process is Ultimatte; also the name of the company that manufactures Ultimatte equipment. Green Screen Color Code Video MarketingVideo MarketingSee allFacebook Video: Expert Insights & Latest Best Practices [Interview]Real vs Fake News: Which One Is Winning in the World of Online Video?OK Go Slows Down ‘The One Moment’
If your talent is wearing a blue shirt infront of a blue screen, you’ll remove the shirt, and not in a fun way. Share your thoughts with us on Facebook or Twitter.Previous ArticleTwitter Considers Original Web Series, YouTube Redesigns HomepageNext ArticleList of Cloud-Based Video Encoding Tools and Services Mark R Robertson Mark Robertson is It is not specific to any one software package, but rather focuses on the tools that all have in common, and more importantly really explains well how they all work. check over here You’d be able to see green spill plain as day in a nighttime shot, but the blue will bemasked by the bluish tinge of the moonlight.
Here is a page of Useful Books on Film and Video topics. He's also developed a refinement of Ultimatte techniques to create very useful on set alignment mattes for film shoots. He is a YouTube Certified, video marketing expert, popular speaker, and a passionate thought-leader within the online video and search marketing industries. His page is www.bluescreen.com.
The white letters now appear over the background image. The compositing process, whether photo-chemical or digital, replaces all the blue in the picture with another image, known as the background plate. The Chroma Key process is based on the luminance key. Can't other colors be used?
My Home Page, with more links, and a resume.