The term for taking pictures, what is white balance ?

The principle of electronic imaging is the same.

The simplest explanation – white balance is color temperature.

White balance is not something that can be explained clearly in three or two sentences, but roughly means the color reproduction of the photographed object.

A simple example. If a piece of white paper looks yellowish in the sunlight, you can't get a pure white effect when shooting, so you should use the white balance level of "sunlight" to make the white paper look less yellow, reflecting the original hue and color temperature of the object.

For details, please refer to it.

1. EV (**compensation), for **"make up the light".

Compensation: It is to consciously change the "suitable" parameters automatically calculated by the camera to make the shooting technique brighter or darker.

If it is too dark, increase the EV value, each increase in the EV value is equivalent to doubling the amount of light ingested, and if the ** is too bright, the EV value should be reduced, and each decrease in the EV value is equivalent to doubling the amount of light ingested.

The shutter speed is actually the first time, which is an important parameter of the camera. When pressing the shutter, you can only capture vivid images if you take into account the start time of the shutter and grasp the timing of the shutter release.

2. ISO (sensitivity to light), "add shine" to **

ISO, i.e. sensitivity. The high or low ISO means that at the same EV** value, you can choose a higher ISO speed, and you can get the same amount with a faster shutter speed while the aperture is the same. In general, a higher ISO value can compensate for the lack of light, and the higher the ISO value, the higher the brightness of the photo.

3. S is the shutter, and we also illustrate the setting of the shutter speed through the figure.

After clicking the S button, the left and right sliders also appear, there are also values on them, Auto is automatic, and the camera selects the shutter speed by itself. The other shutter specific values range from 1 4000 seconds to 30 seconds, which you can set depending on the situation.

4. White balance, restore the essence of color key hail elimination.

White Balance (WB) is used to control the color reproduction of the camera. The color of the object will change depending on the color of the projected light, and the color temperature will be different when shooting in different lighting situations.

Balance is the idea that the digital camera defaults to "white" regardless of the ambient light, that is, it will be able to recognize white and balance the hue of other colors in colored light. Color is essentially an interpretation of light.

For example, when a piece of white paper is placed in a red light environment, it is actually reddish due to the influence of ambient light. But after seeing this piece of paper, people still know that it is a blank slate, and that is because we automatically make up the result of our brains, and the result of judgment through life experience.

But the camera has no life experience, so when he meters it, he thinks that the white paper placed in the red environment is red. So at this time, the result of automatic metering by the camera will be color cast. At this time, we need to adjust the camera to make him think that the white paper is white, and this adjustment is the adjustment of white balance.

Explanation of color temperature and white balance.

Hands-on demonstration of white balance calibration with white card.

The white balance of a DSLR camera means to shoot the balance of colors and restore the true colors. In daily shooting, you will encounter various light sources, and the color temperature is also different. Sometimes, the image is shot with a color cast, and white balance is used to solve this problem.

White balance effect: by controlling the color temperature, the color effect is very different**; Correct the color temperature and restore the color of the subject, so that the color of the picture shot under different light source conditions is similar to that of the human eye.

White balance is an extremely important concept for cameras. The so-called white balance is the camera's restoration of white objects. When people use the naked eye, the perception of the same color is basically the same under different lights, such as looking at a white object in the morning when the sun rises, and feeling that it is white; And in the dim light of the night, when you see a white object, you feel that it is still white.

This is due to the fact that the human brain has adapted to the color reproduction of objects under different light conditions during the growth process of human beings since birth. However, as a camera, it does not have the adaptability of the human eye, and in different light, due to the imbalance of the CCD output, the color of the camera is distorted: either the image is blue, or reddish.

The color temperature difference under different lights is very different, resulting in different color reproduction of the camera in different lights. To solve this problem, today's cameras have a white balance correction function that compensates for different color temperatures, so as to faithfully reproduce the color of the subject.

1. White balance, literally understood as white balance. White balance is a metric that describes the accuracy of white after the red, green, and blue primary colors are mixed in a display. White balance is a very important concept in the field of television photography, through which a series of problems can be solved in color reproduction and tone processing.

2. Function: There are usually three modes for adjusting the white balance of digital cameras; Auto white balance, bins to set white balance, precise white balance (manual setting mode).

Different cameras have different ways to adjust white balance. Most popular digital cameras use auto white balance. Most quasi-professional digital cameras have a white balance setting.

Professional digital cameras with precise white balance (manual setting mode). Professional digital cameras have white balance in all three modes, and quasi-professional digital cameras have both automatic and binned white balance. It can be selected according to the different needs of users.

3. The use process is as follows:

Use common, non-professional standard light sources. This time, the warm-toned fluorescent lamps used indoors are quite different from the standard light sources, and the contrast effect can be obvious. The equipment uses canong3dc because it has two sets of defined white balance functions, which can store two sets of data separately, which is easy to use.

Shoot with gray card, white card (back of gray card), new white paper, old white paper, auto white balance, and fluorescent light mode white balance. When shooting, use gray card metering first, use M file to fix the **amount, and use this value for each ** shot.

The white side of the Kodak gray card is placed on the background of the subject to determine the color accuracy. Using standard gray card metering, within the range of white card as the background, that is, there is no color level overflow, which will not affect the accuracy of judgment. Each ** uses the color mark function in PS to judge the color value.

White balance, literally understood as the balance of white.

The reason why the human eye perceives some objects as white is because the human brain can detect and correct color changes like these, so that the color of white objects seen by people is still the same in sunlight, hazy weather, indoors or under fluorescence. The human eye can self-adapt, but the digital video camera does not have such an intelligent function, this is because the CCD image sensor itself does not have this adaptive function, in order to be close to the human visual standard, the digital video camera must imitate the human brain and adjust the color according to the light, that is, the white balance needs to be adjusted automatically or manually to achieve a satisfactory color, the white balance sensor of the digital video camera is generally located under the lens, which can automatically perceive the surrounding environment, so as to adjust the color balance.

The function of white balance brings a lot of convenience and unexpected effects to our photography. For example, during the day, you can shoot the effect of night, so that the tone is cooler at night to create an eerie atmosphere, and warmer can create a warm scene.

Operational tips and methods for white balance.

But sometimes if you want to shoot something different from the human eye, you can use the white balance adjustment** tone.

To put it simply, it is to make RGB that is, red, green and blue three-way electrical signals achieve the color balance in a predetermined environment, so as to achieve the actual color true restoration.

Backlighting is also a good piece.

Many people have the impression that only silhouettes can be shot with backlighting, but I personally think that as long as the shooting angle is well controlled, you can still shoot some good images. Take this photo ** as an example, shot on the streets of Tokyo, shooting at the moment I only feel that the sunset afterglow elongates the figure of the passerby is very beautiful, if it can be combined with lomo tone shooting will be an interesting combination, it is such a simple idea, I began to look for a suitable scene for framing, and finally I chose to shoot under the overpass (mainly to avoid direct light to make the silhouette of pedestrians more obvious), test shot a few shots, and finally took this image that matches my mind.

If the white balance is not adjusted.

The tone of the film is not normal.