I will give you a detailed analysis of the photoshop software and share with you the post-tutorial of neutral gray portraits.
Tutorial sharing:
First, let's look at the effect chart comparison.
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This opportunity cannot be missed for many friends who like to take the lead in everything and stir-fry themselves. So we have a lot of mixed learning and self-thinking record-turning tutorials flooding the network, and then correct them one by one in the following discussions.
Of course, every sharing in recent years has been questioned by many of my friends, most of which involve sharing of commercial advertisements. I do not fully deny this. After all, my current full-time job is to do graph training. However, it is not just because I am engaged in this line of work. Just because there is advertisement information contained in the sharing, it is asserted that my sharing is malicious. For example, if someone has been insisting on voluntary traffic at the crossroads for a long time, everyone thinks this person is a good person with integrity.
However, in order to maintain daily livelihood, this person recently opened a convenience supermarket at the intersection while conducting voluntary traffic evacuation, can we use this to assert that this person has become a snoop who is only profit-making and eager to smoke? Can I comment and blame others for voluntary traffic guidance to take care of his small supermarket business? There are countless sellers who do not volunteer, so how should we comment on such behavior? Do not treat a gentleman in the heart of a person.
Before we begin, let's analyze the principles of neutral gray image repair techniques, so that you can understand them more concisely and clearly. First, we need to understand what the gray scale is. It should be clear that the image is composed of three primary colors: R, G, and B. The full order of each color is 255, and the total order of 0 is 256, so there is a saying that 16 million colors or 10 million colors (256 × 256 × 256 = 16777216 ).
When the R, G, and B values are both 255, they are white. When the R, G, and B values are both 0, they are black, because black and white are only brightness changes, therefore, it is gray when R, G, and B are equal and not 0 or 255. When the R, G, and B values are equal and are not 0 or 255, the larger the equivalence value, the brighter the gray value and the darker the smaller the gray value. The neutral gray R, G, and B values we mentioned here should all be 128, because 256 then 2 = 128.
However, when I saw a friend on the Internet, I introduced the R, G, and B values of neutral gray in my self-recorded neutral gray tutorial. If this type of friend has no problem in elementary school arithmetic, it must be that the full values of R, G, and B are incorrectly interpreted as 250.
Next, let's talk about an essential link in the neutral gray image repair process-change the neutral gray layer mode to soft light.
It is clear that the neutral gray layer must be used with the soft light layer mode to modify the light and shade and texture of the image. Therefore, to understand the neutral gray method more easily, we must first understand the specific role of the soft-light hybrid layer mode.
Before talking about the soft-light hybrid mode, we must first understand three concepts: base color, mixed color, and result color.
For example, if we open an image in PS, create or copy a layer, or place a new image, we will refer to the following background layer as the base layer, the color of each pixel is called the base color. The layer above is the hybrid color layer, and the color of each pixel is called the mixed color here; the final effect color displayed after modifying the blending mode of the color mixing layer is called the result color.
Next we will introduce the features of the soft light mode. The effect of the soft light hybrid mode is similar to that of the divergent spotlight on the image. This mode determines whether the final effect of the image is brightened or dimmed based on the shade of the mixed color, and then changes the saturation of the base color. Use this mode to make the color brighter or darker and produce more refined effects than the overlay mode or the glare mode.
If the mixed color (light source) is brighter than the gray color of 50%, the image will become brighter, just as it is reduced;
If the blending color (light source) is darker than the gray color of 50%, the image is dimmed, just as it is deepened;
If the mixed color (light source) is 50% neutral gray, the brightness of the image remains unchanged.
The use of pure black or pure white painting will produce obviously darker or brighter areas, but will not produce pure black or pure white, which is determined by the formula used in the preliminary design programming of the soft-light hybrid mode.
Mixed color 128: result color = base color + (2 * mixed color-255) * (Sqrt (base color/255) * 255-base color)/255.
Of course, we only need to know the characteristics of the corresponding layer mode, and there is no need to study its formula in depth.
This is like learning how salty the salt, how sweet the sugar are, and how delicious the food can be made during cooking, there is no need to break the sandpot's question to the end to study the chemical composition or specific structure of salt and sugar. It is very good to have a mentality of endless learning and refinement, but we should never put it upside down or give it away, this saves time.
You may ask, "If the mixed color (light source) is 50% neutral gray, the brightness of the image remains unchanged .", So why do we have to fill the mixing layer with neutral gray? Why not use the mixed mode as the blank layer of the soft light directly?
This is because after being filled with neutral gray, you can use a black and white paint brush to apply it to the gray layer to reduce the image effect, you can also directly use the fade-in tool to apply it to the neutral gray layer to achieve the same effect.
Of course, if you think it is too troublesome to fill the neutral gray layer, it is also possible to directly use the mixed mode to fill the blank layer of the soft light. However, in this way, you only have one choice of black and white paint brushes, because the blank layer does not have any pixels to be reduced. Since the English translation of the subtraction is Dodge and the deeper English translation is Burn, some people also call this type of graph repair method D & B.
On the Internet, I also saw a friend introduce the neutral gray layer in the neutral gray tutorial that can be used with both soft light and overlay. This is also a big mistake, the reason is that there is a significant difference between the soft-light hybrid mode and the overlay hybrid mode.
Next, let's give a general introduction to the characteristics of the hybrid mode of overlapping layers to explain why this type of understanding is wrong. The overlapping hybrid mode allows you to add colors to the underlying image (base color layer) while maintaining the highlights and shadows of the underlying image. This mode overlays the blending color and base color, that is, the underlying image controls the layer above to make it brighter or darker.
The area to be darker than 50% will be dimmed in the front-slice stacked mode, and the area to be brighter than 50% will be highlighted in the filter mode. In general, the change occurs in the middle tones, and the high and dark colors remain unchanged. The color is mixed, but the brightness details of the highlights and shadows of the base color layer are retained. Therefore, the hybrid mode of neutral gray layers in the neutral gray repair method can only be soft light, rather than overlay.
It may be because these friends have a low intensity of paint when they are wiping the gray layer, so it is difficult to tell the difference between the superposition and the soft light, in this way, the middle gray layer can be used in both the overlay mode and the soft light mode.
On the Internet, I also saw a friend who introduced his invention and created a new image repair method called the blank layer (flexo hybrid mode) repair method, I personally think that this "creative invention" is really a bit of a joke.
I think everyone knows or has heard of the hyperbolic graph method, that is, to create a bright and dark curve adjustment layer, reverse the mask to black, and then set the foreground color to white, in the area where the image needs to be brightened, use a paint brush to gently wipe the curve adjustment layer mask, when the image needs to be dimmed, the paint brush is used to gently wipe the curve adjustment layer mask with a dark adjustment to finish the texture modification of light and shade.
The two image repair methods, hyperbola and neutral gray, use the principle of deepening and fading. They have their own advantages and disadvantages. We will not describe them here.
So, if we replace the hyperbolic curve with two color levels, can we say that we have invented and created a two-color level repair map? We are all used to eating with chopsticks. If we eat with two branches, can we say that we have invented new ways to eat?
You can also see a graph repair technique called "brightness repair method" on the network. It also uses the "blank layer repair method" described above, the difference is that the layer blending mode used by this method is the brightness mode. I personally disagree with this method.
Next we will give a general introduction to the features of the hybrid mode of the brightness layer to explain why this method is not desirable. The brightness blending mode applies the brightness of the current image to the underlying image and maintains the color and saturation of the underlying image. The effect created in this mode is the opposite of the color layer blending mode. Therefore, a mixed color image only affects the brightness of the image and does not affect the color of the base color. Please remember, except for black, white, and gray.
In the brightness mode, pure black and base color are mixed to produce pure black, because the brightness of pure black is the lowest; pure white and base color are still pure white, because the brightness of pure white is the highest; different degrees of gray and base colors are mixed to produce different degrees of gray.
I guess the reason for this misunderstanding is also because the overall intensity of the paint brush is very small when the brightness hybrid mode is used to repair the image, as a result, it is difficult for the human eye to notice the brightness change while the color and saturation have quietly changed.
Some may say that after the image is modified using a neutral gray image repair technique, the brightness changes and the saturation also changes? This is because the softening mode is characterized by increasing the contrast between light and shade, and then increasing or decreasing the saturation. However, it should be noted that the neutral gray image repair method will not change the base color, thus reducing the burden on the subsequent colors.
As long as it is a correct guiding tutorial, there is no distinction between "advanced" and "basic", depending on different audiences.
A so-called advanced tutorial seems like a newbie who is not yet well-founded, because it cannot be understood. On the contrary, you give him a so-called basic tutorial, he will be successful, because this is the magic weapon to solve his current bottleneck.
A so-called basic tutorial seems to be rubbish to a friend with relatively solid basic skills, because he has been familiar with it. On the contrary, you give him a so-called advanced tutorial, he will be excited, because there is his way of thinking. In the same sense, there is no distinction between high and low tools. For different modification and adjustment, only the tools are correct or not.
If you choose to use the liquefaction filter for color coloring, then can we assert that the liquefaction filter is a low-end tool? If you choose to easily adjust the light and shade with a color order or curve tool, can we say they are more advanced than the liquefied filter? The Masters we worship are also similar basic tools, but why can they be superb?
That's because people use the right tools in the right place, because people use the so-called basic tools.
Learning is like sailing against the water. If you do not enter, you can leave. For example, if you want to go to the elevator in reverse mode, and want to reach the end point in retrograde mode, you can only step in the same place, only a desperate rush can achieve success. However, if you select the right direction (by taking the elevator), you will be able to get twice the result with half the effort, so that we can easily get the beauty we desire.
There are three reasons for dirty images: inconsistent colors, saturation, and brightness, that is, H, S, and B. The neutral gray image repair method we will talk about here is to adjust the local brightness so that the light and shade of the image become clean and smooth. After so long, before officially introducing the neutral gray image repair technique, we have to say another thing, that is, the establishment of the brightness observation group. The purpose of the brightness observation group is to shield the effect of color on the modification of light and shade and to increase the contrast between light and shade to assist observation.
Open the image, create a pure black adjustment layer, and change the layer mode to color. This is done to shield the color. There are a variety of methods and methods, not to say that you must use this method, as long as you have achieved the goal of color removal.
Then I increased the contrast between light and shade. I used to copy the established pure black adjustment layer and change the mode to soft light.
If you think the contrast between brightness and shade is not strong enough, you can modify the layer mode to overlay or add another curve adjustment layer. In the curve adjustment layer, highlight and adjust the dark shadow parameters. Similarly, you only need to increase the contrast between brightness and shade. To facilitate management and operation, select two solid color and curve adjustment layers, press the shortcut key Ctrl + G to create a group and name it the brightness observation group.
In my earlier tutorial, this step introduced "copying the pure black adjustment layer created in the first step, and changing the mode to overlay .", A good friend ran out and corrected the error. I didn't get the same observation group effect as you did according to your method. What you said was wrong.
I have already explained in the tutorial that there are many methods for setting up the brightness observation group. I don't have to follow the methods I mentioned, in addition, you must adjust the relationship between the brightness and shade of the image and the relationship between the brightness and shade of the image. Learning should not be hard-built, learning is the way of thinking and ways of thinking, so that we can draw inferences from each other and truly get connected.
After the establishment of the brightness observation group, we will go to the neutral gray layer wiping stage. Create a new layer under the observation group, fill in the neutral gray of 50%, and change the layer blending mode to "Soft Light ". You can also press the shortcut key Ctrl + Shift + N. In the pop-up window, select set mode to soft light and select "fill soft light neutral color ". Press the shortcut key D to set the default foreground color to black and the background color to white. Press the shortcut key X to switch the foreground color and background color. Press the shortcut key B to select the paint brush tool, and set the paint brush to a soft angle brush. Set the hardness to 0 degrees by default.
The size of the paint brush can be set at will first. The specific size parameters should be adjusted at any time according to the size of the modified area. Set the opacity and traffic of the paint brush between 10 and 15. Of course, you can also adjust it according to your personal preferences and specific circumstances. Many of my friends do not know the difference between "opacity" and "Traffic". Let's give a general introduction here. Opacity must be understood by everyone, because the role and characteristics of opacity can be understood only by literal meaning, and the understanding of traffic may be blind spots. Traffic can be seen as secondary control of opacity. The opacity of the actual painting is the product of the two.
If you do not have a simple and clear understanding, you can introduce it in the vernacular to solve this problem that has plagued you for a long time.
If you like to use a paint brush in the form of dots, set the opacity parameter to a smaller value and the traffic parameter to a greater value;
If you prefer to use a paint brush as a drag, set the opacity parameter to a greater value and the traffic parameter to a smaller value.
Whether the image is used in the form of "dot" or "drag" depends on the specific area you have modified.
If the modified area is a small dot or a small line, it is certainly easier to use the dot form. If the modified area is a surface area or a relatively large area, so it must be simple and easy to drag.
For more information, see the specific region you have modified. Here we will talk about the difference between "opacity" and "fill" of the layer. Lowering the opacity parameter of a layer will reduce the overall opacity of the layer (including the opacity of the style, such as stroke and projection). Lowering the fill parameter of the layer will reduce the opacity of the layer image, however, the opacity of the layer style does not change.
All preparations are ready. The next step is to wipe the gray layer with patience. However, patience is far from enough. When you wipe the gray layer, you must first handle the large light and shade (the light and shade distribution of the image itself ), then, the detailed modification of the canvas is enlarged. You need to understand the ups and downs of facial features, because the protruding area is the high-light area, and the concave area is the shadow area. Of course, this is only an understanding of the normal state, but also the light distribution judgment based on the light source direction of the image itself.
Today, we mainly analyze neutral gray image repair techniques, so we will not go into details about the specific light and shade and texture distribution here, interested partners can search online or go to the bookstore to read sketch books.
Many of my friends asked why we should first modify the big light and shade, and then refine the local details? Let's give an example. If we buy clothes in a store, do we have a general style in our mind in the early stage? If it doesn't matter, do you have to observe the style display in each shop window on the street before going shopping? It doesn't matter if you haven't done this. Do you have to look at the style first after entering the store? Style like to look at the specific work or try on, check whether there is a wire head and so on, I believe that when you shop to buy clothes, it will not be a door directly holding a piece of clothing to see whether there is a quality problem of work, when I felt that there was no quality problem, I looked at the clothes style again and found that I didn't like the style at all. Then I continued to look at the details while changing the clothes next to me?
Everything is done first, and then the partitioning of the local details is done. It is difficult to build a hundred feet tall building on a regular basis.
Some enthusiastic friends questioned whether you didn't say that you wanted to enlarge the canvas to 500% in units of pixels in your early tutorials? The reason is that the large pictures and shadows used in my tutorial are not very difficult, so I skipped the details of the large light and shadows.
Some enthusiastic friends criticized that the image details in your early tutorial were too distorted, the details were too delicate, and they looked fake. This is a specially designed tutorial to highlight the features of neutral gray functions. You can determine the level of detail based on your own needs during the production process. Do not follow the rules. The specific image repair intensity and parameters should be determined based on the actual situation and needs of the image you have repaired.
Learn the essence of others and discard the dregs. Combine your personal preferences and innovate, and you will have your own unique style characteristics. I bought a piece of meat in the market and went home to get a drink. But I found that the meat was fat and thin, so I threw the whole piece of meat into the trash because I didn't like it?
Here, we will share with you how to make authentic Sichuan food dishes. If you do not like spicy food or do not like to eat hemp, then you just need to put less chilies and peppers when making your own dishes, just change it. Why do we have to force ourselves to copy others?
Because the soft-light hybrid mode is characterized by "increasing the contrast between light and shade and then increasing or decreasing the base color saturation", after the neutral gray modification is completed, the local color and the overall skin color are inconsistent, and the skin color can be unified later.
Brightness is not uniform. We recommend that the brightness observation group be modified with the D & B image repair method. In fact, the color and saturation are not uniform, it is also possible to establish a unified color-phase observation group and saturation observation group with specific modification methods. However, this method is too cumbersome. Next we will introduce a relatively simple uniform color method, that is, the "uniform color mixing mode ".
The operation method is very simple. Create a blank layer, change the mixed mode of the layer to color, and select the color next to the partial color from the foreground color, use a soft angle paint brush tool to gently wipe the partial color until the color is basically unified. Although this method is not very accurate, it is enough for most films.
Next we will introduce the features of the color mixing mode so that you can better understand the uniform color method.
The color blending mode references the brightness of the base color and the color phase and saturation of the mixed color to create the result color. It can use the saturation of the mixed color and the color phase to color at the same time, so as to protect the gray color of the image (the degree of brightness), but the color of the result color (the color saturation) is determined by the mixed color. The color mode can be regarded as the comprehensive effect of the saturation mode and the color phase mode. It is generally used to add a monochrome effect to the image.
You may think that the explanation of the neutral gray image repair method is clearly stated. Why does the neutral gray mean much?
Because neutral gray is a working principle of deepening and fading, as long as you master the intensity control of the paint brush and the specific distribution of light and shade textures, you can easily master the graph repair techniques of D & B after working diligently, in this way, you can get the amazing effect of light and shade.
Although we have not used a lot of space to introduce the specific operations of neutral gray graph repair (because it has nothing to say ), however, I spent a lot of time explaining the incorrect understanding of the neutral gray image repair technique, instead of the wrong understanding. Isn't the correct method left? If you do not make mistakes and try to avoid mistakes, the overall direction will not be too far away. In addition, with the hard work of your own exercises, success will give me away?
Final effect chart
When talking about a foreign topic, many new users asked me if I could use a digital board to repair images much better than the mouse? I will not explain it here. I will give you a brief explanation using a small example.
A newbie who won't play with drifting cars, should we give him a sports car and he will suddenly? A leader who will play with the float and give him a bad car, he is also proud of the float, but he is not so cool.
I have been using the mouse all the time, but I do not deny that it is much easier and quicker to use a tablet than a mouse. It's just that I am too busy at ordinary times and have never had so much time to adapt to it. Graph repair relies on basic skills, and hardware plays a secondary role. I hope you can spend more time improving your technical and aesthetic capabilities, because this is the best way to success.
All right, the above information is the detailed neutral gray portrait refined Post-tutorial analysis shared by the users of this software in photoshop, you can see that the software users here, Xiaobian believes that everyone is now very clear about the refinement method, so all users are going to follow the small series of tutorials to try it.
