Adding transparency to image files is often important to many users. One of the things you can do with an alpha channel is to create a mask. How do you use selections to create the alpha channel mask? In this video, instructor Richard Harrington demonstrates the advanced control you have with the Select and Mask command in Adobe Photoshop CC 2019.
with a different subject matter. In this case, working with the person. In Photoshop, I'll choose browse in Bridge and open up this advanced controls. In this case, I want to make a few changes. Let's start by making a quick selection. We'll choose that right there, We'll expand that and choose edit, content aware fill.
Now let's try this select subject command, which should find the person in the shot. Looking at this, I want to take advantage of a couple of choices. Let's work up here for a second, and I can see with show original, the change.
of the smart radius. What I'm going to do is grab the refine edge here There we go. Right bracket for a bigger brush and paint on the edges there of the hair to create a more natural transition for the subject. Clicking show original lets me see the change that's creating, and that's important there.
We're adding in some opacity to the hair. Let's paint over that little bit you really see a huge, important change. All right, that's looking good. I'll smooth that ever-so slightly with a little bit of gentle additional feather. Now let's switch over to the black and white version. Taking the time to paint over really helps that stand out.
I can quickly toggle between to evaluate without losing ground. That looks good, and again, always use the high quality preview. Now if I uncheck that, you see it evaluates that edge, creating some ramping.
Show edge is going to be a great way to evaluate where the transitions are looking at. So I see a nice, gentle edge here but not as much on this side. Uncheck show edge and that looks better. but a little bit here at the edges of the hair is quite useful.
That looks better. Now, after edge detection, we can do the global refinements. Remember, this makes it simple to expand or contract the edges. is going to give you a tightening effect that's useful. but a slight shift is quite good. Now what we'll do is output this to a new layer with a layer mask.
And click okay. And as you can see, it did a great job on the extraction. The hair is really quite good. If needed, I can click on the mask here and grab a tool like the blur tool. Let's just choose it here, and using that, I can paint on the mask here And that just helps smooth that out a little bit.
There we go. we could take a look at a tool like the smudge tool and I can tell it to smudge the light pixels. So now as I paint, it's pushing that mask around a little bit and filling it in. In any case, though, this is quite effective. And if needed, you could always go to a traditional paintbrush, and set the opacity quite low.
As you paint, this nondestructive mask will build back up so you can deal with the finest of hair pixels and edges. Now as you can see there, we've done an excellent job of tackling the hair and the edges. By working with the feathering, the refined edge, lower opacity, and a little bit of painting, we were able to completely remove the background from the subject.
- What are selections?
- Creating masks from selections
- Using the selection tools, including marquees and lassos
- Moving a selection
- Selecting with the Quick Selection tool
- Growing, smoothing, and feathering selections
- Transforming a selection
- Using the Refine Edge command
- Selecting a color or tonal range with Color Range
- Making a selection with the Pen tool
- Creating selections from channels
- Saving a selection as an alpha channel
- Using the Content-Aware tools for selections
- Using Face-Aware Liquify