All language subtitles for 90 - Noise Removal

Now that we have a better understanding
of the concept of noise, we'll be working

with the sharpening settings
in the Detail Adjustment panel.

Before we get started,
let's zoom in to this image

using a magnification ratio of 4 to 1.

Also, make sure that the ring occupies
the center of the preview area.

You'll notice that in addition
to our image in the preview area here,

we also have a smaller preview
in the Detail Adjustment panel

and we can navigate around in here
as well.

Now, to increase the sharpness
of this image,

we need to increase the level of noise
in this image.

That's exactly what the amount slider here
will do for us.

If you slide the amount
slider to the right,

you increase the noise level in this image

and right away you can see

that it becomes a lot sharper.

Okay, so this is before and this is after.

We can zoom back out

to see the difference as well.

So this is before just pay attention

to the details in the ring
and this is after.

So you can see that it did sharpen it up
quite a bit.

Now, if we sharpen it too much, it

creates
very defined white lines in the hand.

And we do want to avoid that.

And this is the reason it's important
to be careful on

how much noise is applied,
especially with portraits.

Noise can sometimes make skin pause
look a little bit too defined,

and that's not a good thing.

So for this reason, we'll bring the noise
back down just a little bit.

Okay, that looks good.

Now, the next slider we have
here is the radius.

To better understand the role of
the radius setting, hold the option key.

If you're on a mac or the alt key,
if you're on a Windows machine.

So make sure you're holding the key down.

Now, drag the radius slider to the right.

This is a handy tool,

and it allows us
to see the edges of our image.

The edge is where any given
highlight meets a shadow.

So intense lights and darks produce
much more pronounced edges.

The sharpen setting actually sharpens
in the form of a gradient,

extending outward
from the edges of our image.

The radius defines

how many pixels outside of the edge
the sharpening effect can travel.

So for example, a radius of three

will extend the sharpening effect.

It extends three pixels
outside the edge of our image.

So you can see the difference there.

So a higher

radius will definitely produce
a more dramatic effect for you.

Now let go of the optional key and drag
the radius slider all the way to the left.

You know, drag it all the way to the right

so you can see the difference there.

Definitely more noise when we drag
the radius all the way to the right.

Now, the detail

slider controls the amount of sharpening
on the details of the image.

A smaller value will sharpen
only very large predominant edges,

whereas a large value will apply The
sharpening effect to even smaller edges.

And to test this,
you can move the slider from the left.

And now drag it all the way to the right.

You'll notice a much more dramatic effect

when the slider is set to 100.

Instead of a lower number.

The masking slider
allows us to specify exactly

which areas should be sharpened
or excluded.

And before we take a look at this setting,

go ahead and revert to the fit

magnification.

Now hold the option or alt

key again
and drag the masking slider to the right.

You'll notice that when we drag
the image slider to the left,

the image becomes highlighted in white.

The white areas indicate
where the sharpening effect

will be applied, whereas the black areas

indicate where the sharpening effect
will be excluded.

So to make the sharpening effect
less dramatic, you pull the masking

slider further to the right
and it would affect less areas.

Since I

only want the ring in champagne glass
to sparkle a bit

or set the masking value to about 90.

And there you can see the ring in
quite a bit of areas

in the wine glass or sorry, the champagne
glass are also highlighted in white.

Okay,
So I'm going to let go of the key now

and to preview the final changes,
we can always toggle

our preview button on and off.

So hopefully you can see that
you'll definitely see a bigger change

on your own screen
and depending on your screen resolution.

I'll also zoom in a bit here

and do that again.

So this is before.

This is after.

Just look at the ring
in these parts over here

and also look at the champagne glass
around the edges of the glass.

Okay.

So let's go back to the fit magnification
for the next lecture.

We're going to be working
with noise reduction.

So in this lecture, we added noise.

Next, we'll work on removing noise.

So just to prepare for the next lecture,
please go ahead and open this image here,

which is portrait 002.

jpg and we'll see you in the next lecture.