How does PS make skin white and good-looking?

Before modification:

After modification:

Local Details:

The skin becomes transparent, the color deviation is corrected, the picture quality has no loss.

First of all, to instill a basic common sense:

There is a gap between the white and the actual white in the concept of man.

In other words, when we default an object to be white, the brain automatically complements the color, correcting the color bias of the object, so that the objects that are not white appear to be white to us.

And people need a reference system in the brain injury.

This reference system is sometimes the product of experience, for example, we think the bubble should be white, so when we see a purple bubble, it will be the brain that it should be white, so that the environment light is purple.

For example: What color is the object in the picture?

What do you think?

Some references are judged according to the picture, usually judged by the light source, such as the sun and the street lamp.

We return to this picture:

The reason we think this picture is tinted is based on two points:

First, we think that people's complexion should be white, rather than obviously red.

Second, we think the color of the cabinet should be white, rather than red.

Therefore, we have come to the conclusion that the picture is partial color.

But, how can we adjust to correct the color deviation of the picture?

As I mentioned before, there is a gap between the white in the concept of man and the actual white.

Therefore, we do not want to restore white to real white, but the concept of white.

It's time to use our second reference system, which is the light source in the diagram.

We see that a in the diagram and B in the color temperature is obviously different, we make B at the color temperature and a at the color temperature of the same, that is, can achieve the concept of white, that is to say:

OK, some basic concepts, then let's talk about how to adjust the color bias.

Color deviation adjustment is actually a very deep knowledge, the specific operation method may have dozens of kinds of, but actually the principle is so several.

　　First, the Brightness method

This is very good understanding, is to increase the exposure of the screen, then the color will be diluted, so that the color bias dodge.

It has a variety of techniques, such as:

1, Curve method.

Use the curve to adjust the brightness of the picture.

2. Exposure method

Use the exposure value to adjust the brightness of the screen.

3. Optional Color method

Adjust the lightness of a single color with the "BLACK" option of an optional color.

And so on. These techniques are in the area of brightness adjustment.

　　Second, saturation method

This is also very good understanding ah, such as the screen red, then reduce the saturation of red, red will not be so prominent, the color of the screen will be restored to a relatively normal level.

　　Third, Hue method

This is also very well understood, for example, is to convert the color of color to the normal color.

Maybe some people will ask White is no hue, how can one color through hue to white? This question I have already said before, we want to get is only the concept of white, not in the absolute sense of white.

　　Four, complementary color method

This method is to use the complement hue to get the white principle to correct the color bias.

The use of this method is very extensive, but also a more effective way, there are many forms, such as we use the channel curve to adjust the color bias, in fact, is one of the application of complementary colors adjustment. There is a layer of color inversion method, is based on this principle.

　　Five, the color order method

This method is also very powerful, is a lot of color software is often used in one of the means.

In short, the method is to turn the white/black/gray areas of the screen into white/black/gray, which will lead to correcting colors elsewhere.

The above five methods basically cover the current mainstream color bias correction method.

For this picture, we have a variety of means to achieve the purpose of color bias correction.

The process I use is:

1, first use the curve to improve brightness.

2, then use the red optional color.

3, then use the color order method to set the neutral color (iCorrect editlab Pro).

4, and then use the color-level method to set the Black field (PS from the color level tool).

5, the final skin to make a constituency, appropriate to improve the brightness, create a sense of transparency can.

To recommend a color bias correction plug-ins: ICorrect Editlab Pro

One of my favorite color bias correction plug-ins, who used to know, especially its color-order correction function, is very powerful.

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