Find Let's go back to normal and let's look at the categories.
The first category you have here is that can multiply and so on.
These are the substracted category.
It means it will substract the colors.
It will darken your pixels or it will remove the light colors or the bright colors.
So like the name says in the beginning it will darken using whatever is beneath and it will create new
colors.
This is very important.
Group or category of modes because this is the one that you will use to remove white backgrounds.
You darken and then the white background can be removed.
If I use multiply here you notice how the colors have changed here.
They became much dark.
Fine let's go to the next category and the next category is about lightning or making it brighter.
You have to add the light and the screen.
All of them will give you a certain intensity or more intensity in the colors and it will lighten the
colors of the source layer using of course the land underneath.
Now this is what we call the additive category and Ill give you very bright colors and this is used
to remove black background is very useful to remove black background or the black spots within your
image or you will move the next category is the overlay category.
I like to call it like this but actually it's called the complex category the complex category meaning
the words on the GLI less than 50 percent.
So if your underlying Lares do not have any gray less than 50 percent the effort here might be completely
new.
But overlay and in most images and videos we have always less than 50 percent grey in certain areas
at least if I apply overlay here you'll notice that the what ever is less than 50 percent grey has been
removed.
It has been lightened.
This is the job of the complex category so this category is extremely useful and overlay itself is a
very nice one that we almost always use.
You can take each one of them and will try them in the next lecture.
But just to show you the hard mix is trying to brighten all the gray areas and also brighten the less
gray area.
As soon as there is less than 50 percent gray each will work very fine.
Good we go to the difference category.
Actually this is called the difference category.
The difference category will make the difference.
It's an algorithm where the result is the difference in colors between the source and the underlying
layer.
It is a very nice and the options that you have here will differ very much difference.
For example is different from divide not just here.
Each one of them.
So there is an algorithm here that will work and we change completely the colors of the source layer.
I will cover the stencil and this is the category that we call the math category.
It will create Amati you know like transmat something like this for all the layer.
Or the layer underneath.
If you use and my unit is here.
It has created some kind of it not.
We will see that in the case and how to use it.
So in summary you have the substracted category where you will substract the colors and make them darker.
Very useful to remove white backgrounds and the difficult category is when you lighten the colors and
it's very useful to remove the black background complex category.
Will work on the 50 percent or less gray and makes a lot of changes there.
Difference category will give you a result where the colors that will appear on the source are the difference
of the original colors of the source and the underlying one and then we have the math category that
will act like a magnet or retract.
This one we have seen for the last years and we see them in detail.
Starting next lecture.
Thank you very much for listening.
I will see you in the next lecture.