HDR Example: post-processing of photos

Backward push the thought of the late:

Photos can be divided into two categories: black-and-white and color, of course, some photos are black-and-white and color mix, but I think, as long as your photos have color, that is photo, even if only part of the color.

Black and White can only reflect the brightness of information, and photo is more than Black-and-white color information. So, looking at a photo later mainly from three aspects to see: light, color and detail.

1. Light

First speak the light bar, the light is divided into three categories: over exposure, exposure, normal exposures.

Japanese style

As I said earlier on the Japanese style, it is the exposure of the representative.

2. Color

Secondly, is the color, this is a color works of the key.

The main influential factors are the following categories: Contrast saturation, hue, color balance.

Contrast is the measurement of different brightness levels between the brightest white and darkest black in a picture. More abstract, in fact, this more based on experience to judge better, pictures see more, you will know what is high contrast, which is low contrast, of course, here is relative to the height.

Generally speaking, my experience is that the picture is gray, contrast is low, the screen Black-and-white contrast is obvious or particularly bright, contrast high.

Saturation contrast

Saturation refers to the brightness of the color, in general, the higher the saturation, the more colorful color, black and white gray three-color performance is weaker, and vice versa. Low saturation, black and white ash significantly increased. High saturation, black and white ash significantly reduced.

Hue, not a man to see the appearance of beauty, it is used to distinguish between different colors, PS in the hue adjustment will cause the color itself change.

Color balance: Balance is balanced, that is, the need to balance the color of the picture.

3. Details

What is the details, is itself with the light and color independent, but the screen has a significant impact, such as HDR, it can enhance the performance of the details. such as Pointe-noire, can highlight the center, creating film feeling. For example, the use of good text can add a lot to the picture. There will be a detailed explanation later. Well, the theory is part of this, the following actual combat coming.

Next, answer me a question first, the following two pictures, which is the original image:

Effect Chart Contrast

The one on the top? No, none of them, the following is actually the original image.

Picture description

Compared with the above, do you see the magic of Ps.

I was just a random search on the internet to do the later, if there are raw files, I am sure, the effect will be even more amazing.

This image is applied to HDR, hue, saturation, contrast, color balance, and many other treatments, followed by a detailed explanation.

Image analysis Process:

1. Case one--low saturation

OK, the following is a formal demonstration of the analysis process of the image.

Original artwork: Meet

First, take a look at our three elements: light, color and detail.

Light: The right high light has more pixels, should be the upper right corner of the sky, the whole belongs to mild exposure.

Color: The picture has a little hazy, gray sense, contrast is low, at the same time, can also see the saturation is low, hue does not see, color balance blue.

Details: None.

Adjust the exposure, which is more obvious.

Adjusted histogram:

Adjusted histogram

Therefore, we can get similar effects of the picture may take the method is: lighten, reduce contrast, saturation, color balance blue.

2. Warm Tune Example

Warm Tune Example

Look at this picture again, the same three elements:

Light: Light through the exposure.

Color: Contrast normal, saturation normal, hue warm, optional color yellow.

Details: None.

Approximate steps: Slightly lighten, radial gradient you know, color balance yellowing adjustment, hue adjustment.

3. High degree of saturation

High degree of saturation

The three elements of the picture:

Light: normal.

Color: Contrast is high, saturation is high, hue is warm, color balance is yellow.

Details: text.

This kind of picture saturation is its characteristic, but the partial warm color is not its characteristic, the aggravating environment colour is more able to depict its characteristic than the partial warm.

Cold tone Picture

This picture, for example, has an obvious cold hue, but what they have in common is that the ambient color has been strengthened. Therefore, to see a picture of the latter method, should grasp its intrinsic characteristics, rather than the characteristics of the surface.

4. Pointe-noire sample

Pointe-noire sample

The most obvious features of this picture are: High contrast, low saturation, Pointe-noire, blue color. After the portrait processing has the texture, then adds the black-and-black, adds the blue process.

Pointe-noire sample

Three elements of this picture:

Light: Low Brightness pressure

Color: High contrast, low saturation, no obvious color deviation.

Details: Pointe-noire

Therefore, the general idea is to reduce brightness, increase contrast, reduce saturation, adjust the shadow high light, plus black and black.

5. Sample Film Traces

The three elements of this picture:

Film Traces sample

Light: Exposure is normal.

Color: Contrast normal, low saturation, hue fine-tuning, color balance fine-tuning.

Details: Pointe-noire, film marks (note the white dots in the upper right corner and the very light traces of white).

Light analysis

This is a composite photo, the overall tone slightly heavy, but the synthesis of the time seemingly did not notice the unity of light, the figure of people and the ball of light from the left, and the clouds of light from above, slightly less harmonious, but the shadow of what the processing is in place.

Well, not to discuss the composition of the details, the tone of the treatment is to reduce saturation, fine-tuning hue, as to the extent of your needs from the set, I do not have the original, also do not know how to adjust to what degree, unified tone, with optional color and color balance integrated use.

Simulate a palette:

Simulate palette

Recommend a plug-in: Alien skin exposure. Plus the black-and-black, add photo scratches, simulation film effect is very easy to use! Strong Push!

6.HDR sample

Photomatixpro interface

Now let's talk about HDR, first of all, we recommend an HDR software Photomatixpro, this software is very powerful HDR, it can be on the intensity of HDR, saturation, color temperature, high light saturation, shadow saturation, gamma value, high light smoothing, shadow smoothing and other parameters to adjust, Basically you can point to where to hit.

HDR Example

This is the effect of HDR, and then adjust hue, if you do not know the principle of color change, pull the color of the buoy to meet their favorite colors to stop on the line, of course, sometimes adjusted hue, will lead to color is very strange, this time to reduce the saturation will have a certain effect. I chose a favorite red.

Here's a little tip, hdr from the principle of a multiple-file exposure of the photo can be synthesized, but sometimes we only have one picture to do? Then you just copy the photo, and then use the software to open the original piece and copy the picture on the line, the above is a photo synthesis.

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