All language subtitles for 74 - Histogram and Exposure Correction

Now that you have a better idea
of navigating around the develop module,

we can start working on the adjustments
panels.

We'll start with the histogram.

We've worked with the histogram
a bit before.

We know that it contains a graphical
representation of the different color

ranges within a composition,
the darker range of colors on the left

and the lighter
range of colors on the right.

We know that any overexposed areas
will show up on our histogram

is pure white, whereas underexposed areas

will show up as pure black.

One of our goals in photo
adjustments is to eliminate

as much under an overexposure as we can.

Sometimes there's enough metadata

stored in the image to recover
lost detail.

The histogram in the developed module
has some unique features

that allow us to easily detect the under
and overexposed areas of an image.

For the purpose of this lecture,

we'll need to load image wa0 01.

jpg in our develop area.

So what I'm going to

do is I'm going to remove these filters
that we created.

So hold the command key
and just click these items again.

And that's going to make all our images
accessible in the thumbnail.

Scroll there again.

Now go back to the library.

Click text

under file name.

Type in wa001 jpg.

So that's an easy way of locating
a specific image.

Now go ahead and double click this image

and just load it in the develop module
by clicking.

By clicking develop.

The reason we loaded
this image is because it contains

some over and underexposed areas
that we can repair.

The histogram in the develop module
has two arrows at the left and right side.

If clicked, the left arrow will highlight
all the underexposed areas.

You can

see that in blue over here
there's not many.

So I'll click off and click on

and you can see these little blue areas
here.

Now click the right arrow
and we can see that

there's quite a bit of overexposed areas.

Now, under exposure
sometimes is used for artistic effect,

but overage exposure is something
you certainly want to avoid.

Keep in mind that if you were to print
an image with many areas

that are overexposed like this
and highlighted in red,

those areas wouldn't print a color at all.

That would mean that the color of the
print medium would come through the image

and we try to avoid that
as much as possible.

The under and overexposed areas
in an image are known as clipping.

If you don't see any arrows on your
histogram, just right click over here

and place a

checkmark
next to show clipping indicators.

Since we now have both arrows, click,

Let's expand the Basic Adjustments panel

to bring up some important options.

So make sure you have

the basic panel here expanded
and if you don't see it

right, click on any panel heading
and just make sure

you have a checkmark next
to each one of these panels.

We're going to be working
with all of them.

So in the basic panel, you'll see
two important sliders, whites and blacks.

And that's our area of focus right now.

Watch what happens when we slide
the white slider

to the right.

You'll notice

our red highlighted areas expands.

This is because adding white increases
the overexposed areas.

The same will happen with the blue
highlighted regions.

If we move the black slider to the left.

As we do that, we're increasing

the amount of under exposure.

Since the goal here is to eliminate
these highlighted regions,

let's go ahead and adjust
the amount of black and whites sliders

until over and under exposure
has been minimized

or eliminated.

So you'll notice that we have eliminated

some of the overexposure

and also some of the under exposure.

Now, since we weren't able to eliminate

all the overexposed areas
by only targeting white,

we may need to shift our entire histogram
to the left.

We can do this by either
dragging our histogram to the left,

so I'll hold my left mouse button down

and I'm going to drag
the histogram to the left.

And as I do, you'll notice that the
overexposed areas completely disappear.

Now you don't want to do it too much,
otherwise

you might start affecting other colors
in the image.

And we're only trying to target
the very overexposed areas.

If you didn't like dragging the
entire histogram to the left,

another way to do

it is to use the highlight slider.

It has the same effect.

So you can see that

the overexposed areas
are now completely eliminated.

Now, for the underexposed areas,
you could do the same thing.

You can take the blacks in the histogram

and slide it over to the right.

Now, I don't have much leeway here.

It looks like

some of the underexposed areas,
there's just not enough data in the image

to recover any detail. There.

So what ends up happening
is that the underexposed areas remain

and then you're just affecting

a bunch of other colors in the image
and that's not what we want to do.

So I'm just going to leave that alone.

There's only a little bit
and it's just not worth

shifting other colors
to eliminate that small area over there.

Now, once you've completed that,
you can press the JT on your keyboard

and that will remove those highlighted
areas that Lightroom put in there for us,

assist us with the removal of the under
and overexposed areas.

So again, that's the JT.

Now we can do a comparison of our before
and after.

So I'll do a left right split

and you can see that for the

most part the color ranges are almost
identical, barely noticeable at all,

and we were able to get rid
of the underexposed areas.

So just switch back to look you.