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Green Screen Correction
Hi all, Someone asked me to touch up a photo taken by another photographer. Its chroma-key (green screen) but the photographer had the subject stand to close to the green screen. Because of that, the subject has a green sheen visible on his cheek from his ear down to the chin, for about 1 inch of his face.. Its not visible on the green screen pic but when I replace it with another background (dark for example) it is very visible. How would you go about in photoshop to neutralize that color. May 11 13 05:42 pm Link Sandwave Photography wrote: Could you post a sample?? It might be a matter of just colour correct it.. but better to have a look first! May 11 13 05:45 pm Link I recently came across this surprisingly easy-to-follow chroma key tutorial that touches on the the key spill feature in Blender's compositing and keying tools: http://www.youtube.com/watch?v=ckRRSRa5fzU I think the person who made the video rendered the video incorrectly. It looks like the aspect ratio of the video should be 4:3. May 11 13 05:57 pm Link The Invisible Touch wrote: I temporarily uploaded the photo here. Its halfway through editing (fethered the edge to get rid of the bleed from the green screen, but you can see the left side of his face has green in it. May 11 13 06:03 pm Link Sandwave Photography wrote: Could you post the image with the green screen still in place? I'll run it through Blender and post the results. May 11 13 06:09 pm Link Thanks for that but i don't use Blender... I want to know the digital process involved in case i have to do it on a machine with only ps installed. May 11 13 06:16 pm Link Sandwave Photography wrote: Photoshop and Paint Shop Pro can't be owned by users because of those programs' nasty, restrictive End User License Agreements. May 11 13 06:20 pm Link Sandwave Photography wrote: Blank layer, change blend mode to color. Sample the skin tone that isn't affected, and paint over the area with green spill on it. May 11 13 06:22 pm Link I would try cloning at a lower opacity like 25%. That should work. May 11 13 06:23 pm Link Joann Empson wrote: Sorry I edited my response after I looked at the blender site. I am very versed with GNUPL and its variants... Although it looks like a great software, I need to learn how to do it in photoshop to learn the process, especially if I am on a locked-down machine with only ps installed. The spill tool does look great though and thanks for your contribution to open software. I will look into the software, but I still need to know the exact process of how to cancel this out, without having to reverse engineer the spill tool source code May 11 13 06:25 pm Link Sandwave Photography wrote: I already described the exact process. May 11 13 06:44 pm Link I just finished doing a bunch of shots for a comic con with the same issue. Here's the solution: 1) Mask out the green screen (I like color range w/ localized color clusters selected) 2) Refine mask quickly if needed with black or white brush on overlay setting 3) Make a selection via the mask 4) Create a blank layer and create a mask (it will mask via your selection) 5) Change blank layers blend mode to color, use the clone stamp too on current and bellow. This will give you a variance in color vs a singular one from the brush. The mask will also allow you to paint quickly and somewhat haphazardly without having to worry about accuracy from painting across boarders. This should take about 2 minutes if your quick. Cheers, David May 12 13 12:03 am Link Peano wrote: +1 May 12 13 02:00 am Link |
