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Now with the capital bill then you saw several ways that we could go ahead and remove and replace the sky. But a lot of times you may have a person standing in front of a solid colored background. In this case we're going to work with someone standing in front of a chroma key background. But any background that is solid will work as long as there is. A lot of color difference or contrast difference between what you want to remove which is the background, and what the person in the foreground is wearing. So even though we have green here for chroma key background, if I put it over a red or a blue background as long as it is deeper or pretty different, I should be able to easily remove it.
By the way we use chrome key green because green is at the opposite color spectrum of skin, so it's much easier to remove the background, without affecting skin tone. So let's go ahead and step in and use the shot of the bride, the close up of the bride, and I'll show you some tricks on removing and cleaning up the background and the mask. So let me select the bride, we'll jump straight to the masking tool, of course, as usual, we'll work with the copy. Now you'll notice that when you first enter the masking tool, that you see a dialogue box that says, Segmenting.
And you can control how many segments it has with this slider right here either more or less. Now if you want to really see what segments are all about. The best thing to do is go down to the All Layers drop down tab and select Segments. And what this will show you is how the application breaks up the color areas and sometimes you'll get a better response if you have smaller segments and other times you may want larger segments. In the case of using the Remove Background button, we're going to want, larger chunkier segments.
But notice, if I switch this over to say eight segments or eight color areas, to say 39, you'll see that I'm really dealing with a flatter color palate. Now, once I've done this, I can go and press the remove background button, and it's going to do its best job to remove what it perceives as the large solid background color. Now, of course, we don't see any differences, because we're still looking at the segments. So, let's go back and look at our mask.
And as you can see, it did a pretty good job of removing all that green background without a lot of work on my part. Now you'll notice that it missed some areas and that's what we're going to work on next. So let's zoom in underneath her arm, between her waist and her elbow, and show you how you can clean up that area. Once again, switching to the zoom tool. I'll just select that region, and I have a lot of different ways that I can go ahead and remove this. The easiest might be to go back to the drop tool that we learned earlier and just paint out that area, to point out that we can remove this area of green.
Now, there it over did it because it was referencing all those segments we had earlier. So let me hit Undo, and you see that too much of a good thing is too much of a good thing. So I'm going to switch back to fewer segments, and in this case, I have 13, we started with eight, we'll give it a best shot here. And with fewer segments selected, it actually removes a good chunk of that green that's under her arm. As you see, deciding whether you're going to use a lot of segments or a few segments can really effect how effective your mask is.
Now there's still a lot of areas that we want to clean up such as the translucency of the dress, and the green behind it, as well as you may want to work with the very edges of your image.
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