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One of the easiest things that you can do in Photoshop is brighten the teeth on someone. So let's go ahead and zoom in. I'll use the Command Key and the Spacebar and just click and drag to the right on the teeth, in order to zoom into them. And I need to select the teeth. But it doesn't really have to be a super accurate selection. So I'm going to grab the Lasso tool, and remember the hotspot on the Lasso tool is at the tip of that black arrow. So I'm just going to click and drag across, and then come down here making sure that I've got all of the teeth selected and it's okay if you have some of the lips selected as well, and some of the gum, because what we're going to do is, we're going to selectively remove the yellow here, and we're not going to brighten them or anything.
We're just going to take away that kind of yellow stain on them. So in order to do this, I'd like it to be a flexible adjustment. So I will use an Adjustment layer. On the Layers panel I'm going to make sure that the smooth skin layer is the targeted layer, so that when I add my Adjustment layer it will be added on top of that, and then I'll use the Hue/Saturation Adjustment layer. When I add the Hue/Saturation Adjustment layer, Photoshop will automatically convert my selection into a mask. Because it's such a small portion of the image that I have masked, it's a little difficult to see, that there is a little bit of white there on my Hue/ Saturation Adjustment layer.
But Photoshop has converted that selection into a mask for me. If we start changing the Saturation right now, we're actually working on the master. So we're working on all of the color. So this is going to be a very noticeable change obviously. So let's reset the Saturation back to zero there, and come in instead to just the yellows of the image. So you can see down here on the rainbows, we're going to be working just on the yellows here, so that this time when I decrease my Saturation, we're going to remove the yellow in the teeth.
But you can't see the line or the selection or the mask that we created, because there's not a lot of yellow in that lip color. If someone did have a lot of yellow in the lip color or lot of yellow in their skin tone, you might notice a subtle change, in which case you would need to make a more accurate selection to begin with. In probably 90% of the cases, just making sure that you're targeting, the yellow color range in the Hue/Saturation dialog box, will be absolutely fine for removing the yellow stain.
Let's close that. If you do happen to see a little bit of a harsh edge in your image, you can use your Properties panel, click on the mask area and then just add a really small feather there, just to soften the edge of the mask, and in fact, if I hold down the Option Key or the Alt Key and I click on the mask itself, we can see what happens there. There is without a feather. You can see that hard edge, and as I move this over, the edge will get softer and softer.
So I don't want to add that much of a feather, maybe just around 1 pixel, and then we'll close that and click on the Eye icon in order to view the image. Now we'll just toggle that one more time, the eye icon. There's the before and after. And you can see that we've really decreased the stain there, making the teeth brighter and whiter.
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