Just one trick to improve your photo texture

I believe you must have heard d&b, neutral Gray, hyperbola and so on nouns.

What exactly do these words mean? What is the relationship between them?

D&b is a kind of late thought, and neutral Gray, hyperbola is its concrete method.

How do you understand the sentence?

D&b's English is Dodge & Burn, the literal translation into Chinese is to reduce light and deepen.

Its essence is to change the illumination distribution of the picture by reducing light (increasing the light) and deepening (reducing the optical).

We know that the picture of light and shadow information is the human to judge the shape of objects, distance size and other important factors of reference standards.

When a beam of light comes from the right, if there is a shadow on the left side of an object, we can use this to judge the object's size, detail, height, and so on.

Similarly, if we modify the shadow of the picture, then our judgment of the object will change as well.

Give a simple example (demo only, not very fine):

The relationship between light and shadow in the picture can make us feel the presence of the cheekbones clearly.

We can change the appearance of the person's face directly by changing the light and shade distribution through the d&b technique.

This is an important application of d&b: Reshaping the structure.

Therefore, with the help of d&b, we can through the light and shadow relationship, let our face become smaller, also can make our nose more pretty.

Another important application of d&b is to rub the skin, its essence is by changing the relationship between the light and shadow: the characters face spots and other defects are generally in the form of darker pixels, we can increase its brightness by reducing light (increase the lights), and thus with the surrounding skin brightness to achieve the same, To achieve the skin without destroying the texture of the skin.

Therefore, d&b can modify our skin and make us white.

As I said before, D&b is a thought, and which path does this mind need to achieve?

There are many paths, such as using the burn/Dodge tool directly, such as making a selection and then using a curve, such as using neutral ash, such as a hyperbola, and so on.

Then why do people often hear neutral gray, hyperbola, and even someone directly equate d&b with neutral gray, hyperbolic line?

This is because these two methods have a unique advantage.

Take the deepening/Dodge tool as an example:

We know that the Dodge/burn tool cannot be superimposed.

But our neutral gray is based on the layer, so that its properties can be superimposed, we can duplicate a layer is not it?

At the same time, the impact area of the Dodge/burn tool can only be viewed in comparison with the original image, inaccurate, and cannot be previewed instantly, while neutral ash solves the problem.

This is the advantage of the neutral Ash method: scalability and visibility.

What do you mean?

Let me show you a layer:

This is the neutral gray layer of our picture just now.

You can see from the layer directly what part of the image you are dealing with.

This is not possible with the Dodge/burn tool.

At the same time, if you feel that the effect is not strong enough, you can copy the layer directly, equivalent to the effect of strengthening, this is the Dodge/burn tool can not achieve.

Say so much, what call neutral ash?

Simple understanding:

What is the principle of neutral ash? It uses a special blending mode in PS: Soft light.

You can simply understand the soft light blending mode: When a layer's blending mode is soft light mode, if the pixel brightness of a position is higher than 50% gray (neutral gray), then the pixel of layer A at the bottom of the layer will lighten.

Similarly, if the pixel brightness of position A is less than 50% gray (neutral gray), then the pixel of layer A at the bottom of the layer is dimmed.

So, we create a new layer that fills 50% of gray, change the blending mode to soft light, this time the screen will not change, but once we use the brush tool to smear, then the brightness of this layer must be higher or lower than 50% gray, this time reflected to the following layer does not occur corresponding to lighten, darken the change? ?

This is the principle of neutral ash.

I believe you have a comprehensive understanding of neutral ash at this time.

Let's talk about hyperbolic curves.

Hyperbola is also an application of d&b.

The most basic structure of a hyperbola is this:

Through this layer structure, I believe you also understand the principle of hyperbola.

We first light it through a curve, then darken it through a curve, and then hide the two curves with the mask.

If we need to enhance the brightness of area A, then we use the brush tool to paint the mask of the illuminated curve with a white brush, so that the illuminated picture appears.

In the same vein, we can also use this to show areas that have been darkened.

The biggest advantage of hyperbola is that it can be modified at any time you think the white painted, black on the line, you can modify at any time, very convenient (neutral ash can also be modified at any time, as long as the brush set to 50% Gray, but its convenience less than hyperbola, one needs to switch brush color, the second is to adjust the opacity).

Of course, if you've seen a hyperbola tutorial on the Internet, there's usually an observation layer added to it.

What does the observation layer mean?

First you need to understand the role of the observation layer.

The so-called observation layer is actually a layer of contrast enhancement.

Its role is to enhance the screen contrast, more convenient for you to observe the details of the screen, such as skin flaws.

So, no matter how much the tutorials are talking about, you can remember the starting point of the observation layer.

OK, you should know what a hyperbola is.

So, what's the use of d&b?

It's too much to use!

Enhance the lighting! Add the details! Change the texture! Skin Treatment!

Another example:

Convert to black and white and you can see traces of d&b:

In a word, d&b is a common idea of image refinement, which has a greater advantage in reshaping light and preserving skin texture.

Sweep the focus on the practical and understandable original post-tutorial platform.

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