![]() ![]() Of course you can use tools like Remask and Perfect Mask to quickly deal with contamination issues like this, but they can also be used to remove more complex background when you didn’t use a green screen in the first place. In a real shot I might spend the time fixing it, but honestly that’s what I don’t like about green screens – you have to fight the green halo issue. There’s a little area by her right arm, hair and shirt that isn’t 100% perfect but I honestly called it close enough for this article. Mouse in and out to see the before and after The net result of the before and after (using a new background is shown here): With a simple few clicks I ended up with a much better separation of my subject from the green screen and doing a 1px Defringe fixed 99% of the problem. Here’s a quick video that shows how it works: I use the free version of a tool called Easy Green Screen found at that just works at getting rid of most of that nasty green screen. However, that never seems to work perfectly from me (although it does help). Enter a value (usually try 1 and work your way up from there) and voila the green halo goes away. Impact Digital Flash Umbrella Mount Kit ( Matting –> Defringe. To do this technique yourself you need a lighting setup that can be as complex as mine, or as simple as this kit that you can pick up for less than $100 at B&H: However, the industry practice for video (i.e., your local weather forecast where the weatherman walks around with the map behind them) is done with what is called a chroma green screen. Viveza background substitution from white background This works for me, and if I do a good enough job lighting the background then I can also just drop a U-Point control on the entire background and dial up the brightness in Viveza shown in this example here: When readers and my students ask me how to do background replacements on shots and generally I’ll tell them to just shoot on white or black and use the techniques found in Photoshop Compositing Secrets or The Photoshop Channels Book to mask out the background. Impact Chroma Sheet Background - 10 x 12' (Chroma Green)
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