PS Food Repair Map whole process diagram

This tutorial is to a friend of the script House to introduce PS food repair diagram of the whole process diagram, the tutorial is very good, recommended to the script house, together to learn!

Effect Chart:

Why do I always emphasize the use of tools such as histograms to assist us in late judgment?

Because the human eye is deceptive.

Beginners only look at these two pictures are completely unknown where to start, but if:

Look at the histogram:

Look at the contrast chart:

So many of the hidden content has surfaced.

In general, there are two main approaches for late observation:

First, the use of tools

such as histogram, average, standard deviation.

Second, the contrast chart observation

Here are two kinds:

Set the Black field method

Color Order Method

In fact, the essence of the two is the same, all by redefining the histogram of the way, so that the distribution of pixels more homogeneous and natural, thus showing a more realistic theoretical results.

The former uses a set of black-field tools to click on the original part of the screen that should be black.

The latter pulls the left endpoint through the curve tool to the leftmost edge of the histogram.

In fact, the principle is based on the picture should have a pure black part, so you redefine black, as the origin, so that the entire histogram of the corresponding migration.

Let me tell you a little bit about the low light compression curve I've always mentioned.

The essence of this curve is actually:

You populate a white layer and then adjust the opacity of the layer.

You can try to fill a white layer, then turn the opacity to 50%, and pull the low light compression curve to 50% when the screen.

This also exposes a weakness of the low light compression curve:

Not of color.

In other words, it can't change the color of the picture.

At this point, we derive another late trick:

Color layer Fill method.

It combines the advantages of low light compression curve and color regulation.

What does that mean?

The following artwork is:

The picture above has two variations in relation to the original artwork:

Brightness and color.

If we use the low light compression curve, we must first adjust the good color, and then use, but unfortunately, many people do not have such a strong color adjustment ability.

At this point we use the color layer, grab the main hue, fill the layer, and then adjust the opacity.

The principle is actually very simple, combining the low light compression and the opacity of the white layer previously said.

White is actually R255 G255 B255

Color is actually the R241 G56 B146 (the color of a random lift)

In fact, is a change in proportion to the size of the problem (255*50% and 241*50% difference), so if the color layer of higher brightness, will also produce a histogram left missing phenomenon, but not pure white layer so intuitive bale.

The same is true of this picture:

Layer structure:

Therefore, such a picture is actually very simple, first observation, using tools or contrast, and then use the color layer can achieve the purpose.

The key is:

1, how to observe the picture?

2. How to make contrast chart?

3, the meaning of the histogram and its parameters (such as the histogram of the leftmost why is missing, which later behavior will cause it missing, why the highlight curve can not make the left missing, why the low light compression curve, what does this mean)?

4, low light compression curve and layer method of internal relations?

5, the role of color layer and the low light compression curve difference and connection?

6, how to grab the main color?

7. Set up the internal relation between the Black field method and the curve adjustment method?

The above is the PS food repair map of the whole process diagram Introduction, hope to be helpful to everyone!

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Category:

• PS Image Processing