Traditional Culture Encyclopedia - Photography major - What does white balance of mobile phone mean?

What does white balance of mobile phone mean?

Question 1: What is the significance and role of exposure value in white balance in mobile phone photography? White balance adjustment: in TV photography, white balance adjustment is the main method to control the tone of the picture. What is white balance? When shooting a white object to get a white image, that is, when shooting a white object, the red, green and blue signals output by the camera are equal, which is called white balance. White balance is a technical state of the camera. It used to be thought that the camera could only shoot in a white balance state, which was very one-sided. The purpose of adjusting the white balance is not only to make the camera in a white balance state, but also to destroy the white balance of the camera by adjusting the black-and-white balance, so as to achieve the purpose of subjective color cast. There are three steps to adjust the black-and-white balance: first, choose the appropriate color filter (coarse adjustment); Second, check whether the aperture is in the automatic position, and select A or B (not P) with the white balance button; Third, aim at a piece of white paper or other white objects, move the white switch, and wait for the video recorder to appear OK! (white balance completed), and then adjust the black balance. If the black balance is not adjusted, the dark part of the picture will have a color cast and the contrast will be weakened. Black and white balance adjustment is the main method to control the color tone of the picture. Adjusting the balance between black and white is a technical skill and a creative means. Different whitening methods can get different tone effects.

White paper is needed to correctly adjust the color of the scene. There are different shades of white paper, such as green copy paper and yellow white newspaper. Different shades have different effects on the tone of the picture. The rule is that the chromaticity of white paper and the chromaticity of the picture are complementary colors.

Balance with yellow and white paper and the picture will be blue.

After the chromaticity of white paper is determined, it can't be changed at will in the same scene, let alone find a white object to adjust the white, otherwise the color of the picture will not be uniform.

In addition to the choice of white paper, the direction of white paper is also very important. For example, when the exterior is white, it should be placed at a 90-degree angle with the sun, so that the white paper can illuminate some skylight. If the white paper is white to the sun, then the shadow in the picture will be blue. Ambient colors have a great influence on white tones, such as shooting indoors, where the red carpet is laid. To consider the influence of carpet on the tone of the picture, deliberately let the white paper reflect some reflected light from the red carpet, so that the picture will not be blue (the complementary color of red is blue).

If the picture is deliberately biased, you can choose light-colored paper to turn it into white, and white with light yellow tone can make the picture appear blue tone, which is a common method to shoot night scenes. On the contrary, choose blue-green paper to balance white, and you can get warm tones. However, it should be emphasized that you can't use saturated paper or objects for whitening, which will damage the whitening circuit of the machine. Generally, white balance chromatography is used to adjust white.

In short, when using white balance to control the picture color, we should always pay attention to the chromaticity (whiteness) of white paper and the chromaticity (color temperature index) of light shining on white paper.

Satisfied, please adopt! !

Question 2: What does the white balance in the camera mean? The color of the object will change due to the color of the projected light, and the photos taken under different light conditions will have different color temperatures. For example, a photo taken under the illumination of tungsten lamp (light bulb) may be yellow. Generally speaking, CCD can't automatically correct the change of light like human eyes. The following pictures show different images under different colors of light.

The picture uses natural light. After white balance, the image is blue. If white balance is used in light, the color of the picture will return to the primary color state. White balance will immediately adjust the intensity of the red, green and blue colors of the whole image according to the characteristics of the image in the current portrait, and correct the errors caused by external light. Some cameras are not only designed with automatic white balance or specific color temperature white balance function, but also provide manual white balance adjustment and recording.

Balance means that no matter what the ambient light is, the digital camera defaults to white, which means that white can be recognized under colored light and the tones of other colors can be balanced. Color is essentially an explanation of light. What looks white under normal light is not necessarily white under dark light, and white under fluorescent light is also non-white. If we can adjust the white balance for all this, we can correctly restore other colors based on white in the obtained photos. At present, most commercial digital cameras provide white balance adjustment function. As mentioned above, the white balance is closely related to the surrounding light, so the use of the flash will be restricted when the white balance function is started, otherwise the change of ambient light will invalidate the white balance or interfere with the normal white balance. Generally, there are many modes of white balance, which are suitable for different scenes, such as automatic white balance, tungsten wire white balance, fluorescent white balance, indoor white balance and manual adjustment.

Automatic white balance

Automatic white balance is usually the default setting for digital cameras. There is a complex rectangular picture in the camera, and the white balance reference point in the picture can be determined, thus realizing the white balance adjustment. This kind of automatic white balance has high accuracy, but when shooting in light, the effect is poor, and on cloudy days, many automatic white balance systems have poor effects, which may lead to blue. Automatic white balance of tungsten lamp is usually the default setting of digital camera, which hides the skill of flash. There is a complex rectangular diagram in the camera, which can determine the reference point of white balance in the picture, thus realizing white balance adjustment. This kind of automatic white balance has high accuracy, but when shooting in light, the effect is poor, and on cloudy days, many automatic white balance systems have poor effects, which may lead to blue. Fluorescent white balance is suitable for white balance adjustment under fluorescent lamp, because there are many kinds of fluorescence, such as cold white and warm white, so some cameras have more than one kind of fluorescent white balance adjustment. The fluorescent lamps used in different places are different, so the fluorescent settings are different. The photographer must decide which fluorescent lamp to use to achieve the best white balance of the camera. Among all the settings, the fluorescence setting is the most difficult to decide. For example, some offices and schools use various combinations of fluorescent types, and the fluorescent settings here are very difficult to handle. The best way is to try to shoot.

, adjust exposure; Indoor white balance

Indoor white balance, or cloudy or cloudy white balance, is suitable for adjusting the light in the dark to the primary color state. Not all digital cameras have this white balance setting. Generally speaking, the outdoor time-white balance system is in the best state, and these settings are not needed. However, some manufacturers add these special white balance settings to cameras, and the use of these white balances varies from camera to camera. control manually

This white balance has different names in different places, and they describe some white balance settings under ordinary lighting conditions. Generally speaking, users need to point out the reference point of white balance to the camera, that is, which white object is used as the white point in the picture. But the question is what is white. For example, different white papers will have different whites, some white papers may be slightly yellow, flashlights and some white papers may be slightly white, and light will affect our sense of dialogue. So how to determine the true white? One way to solve this problem is to carry a standard piece of white paper with you and compare the subjects when shooting. This method works very well, so when it is difficult to decide this setting when shooting indoors, you may wish to set the white balance according to the reference white paper. When there is no white paper, let the camera aim at the object that the eyeball thinks is white to adjust.

Photography refers to the process of recording images with some special equipment. Generally, we take photos with mechanical cameras or digital cameras. Sometimes photography >>

Question 3: What does the white balance in the camera mean? The English name of White Balance is white balance. The color of the object will change due to the color of the projected light, and the photos taken under different light conditions will have different color temperatures. For example, a photo taken under the illumination of tungsten lamp (light bulb) may be yellow. Generally speaking, CCD can't automatically correct the change of light like human eyes. The following pictures show different images under different colors of light.

The picture uses natural light. After white balance, the image is blue. If white balance is used in light, the color of the picture will return to the primary color state, and white balance will immediately adjust the intensity of the red, green and blue colors of the whole image according to the image characteristics of the current portrait, thus correcting the error caused by external light. Some cameras provide manual white balance adjustment in addition to automatic white balance or specific color temperature white balance function.

Balance means that the digital camera defaults to "white" regardless of the ambient light, that is to say, it can recognize white under colored light and balance the tones of other colors. Color is essentially an explanation of light. What looks white under normal light is not necessarily white under dark light, and white under fluorescent light is also non-white. If we can adjust the white balance for all this, we can correctly restore other colors based on white in the obtained photos. At present, most commercial digital cameras provide white balance adjustment function. As mentioned above, the white balance is closely related to the surrounding light, so the use of the flash will be restricted when the white balance function is started, otherwise the change of ambient light will invalidate the white balance or interfere with the normal white balance. Generally, there are many modes of white balance, which are suitable for different scenes, such as automatic white balance, tungsten wire white balance, fluorescent white balance, indoor white balance and manual adjustment.

Automatic white balance

Tungsten light-white balance

Fluorescent white balance

It is suitable for white balance adjustment under fluorescent lamp, because there are many kinds of fluorescence, such as cold white and warm white, so some cameras have more than one kind of white balance adjustment. The fluorescent lamps used in different places are different, so the "fluorescent" settings are different. The photographer must determine what kind of "fluorescence" the light is so that the camera can set the best white balance. Of all the settings, the "Fluorescent" setting is the most difficult to decide. For example, some offices and schools use various combinations of fluorescent types, and the "fluorescent" setting here is very difficult to handle. The best way is to "shoot".

Indoor white balance

control manually

This white balance has different names in different places, and they describe some white balance settings under ordinary lighting conditions. Generally speaking, users need to point out the reference point of white balance to the camera, that is, which "white" object is used as the white point in the picture. But the question is what is "white". For example, different white paper will have different white colors, some may be slightly yellow, and some may be slightly white, and the light will affect our "white" feeling. So how to determine "true white"? One way to solve this problem is to carry a standard piece of white paper with you and compare the subjects when shooting. This method works very well, so when it is difficult to decide this setting when shooting indoors, you may wish to set the white balance according to the "reference" white paper. When there is no white paper, point the camera at the eyeball. .................................................................................................................................................................. & gt

Question 4: What do the parameters of mobile phone camera, such as white balance, mean? What is the specific function? Please explain or link. Very easy to understand. The reduction degree of white balance and white color, ISO exposure value is suitable for the best, hope to adopt.

Question 5: Does the white balance of mobile phone have anything to do with the system? Hello, I'm glad to answer your questions.

The white balance control of mobile phone screen is related to the screen used.

Although it can be adjusted, it is related to the hardware facilities of the screen and has nothing to do with the system. Thank you.

I hope you can adopt it.

Question 6: What does white balance mean? Balance means that the digital camera defaults to "white" regardless of the ambient light, that is to say, it can recognize white under colored light and balance the tones of other colors. Color is essentially an explanation of light. What looks white under normal light is not necessarily white under dark light, and white under fluorescent light is also non-white. If we can adjust the white balance for all this, we can correctly restore other colors based on white in the obtained photos. At present, most commercial digital cameras provide white balance adjustment function. As mentioned above, the white balance is closely related to the surrounding light, so the use of the flash will be restricted when the white balance function is started, otherwise the change of ambient light will invalidate the white balance or interfere with the normal white balance. Generally, there are many modes of white balance, which are suitable for different scenes, such as automatic white balance, tungsten wire white balance, fluorescent white balance, indoor white balance and manual adjustment.

Question 7: What does white balance mean? Simply put, tell the camera what white n is.

Because digital cameras are not like human eyes, there is a way to separate colors in the face of different colors of illumination.

Digital cameras will make mistakes in judgment. Therefore, we need to tell the digital camera what is white.

So that the digital camera can use the white color we told it to correct and adjust other colors.

Because of lights, the sun, the sky, flashlights and so on. Under different circumstances, white will have color difference.

Color cast will appear in the photos taken.

Now, digital cameras have several built-in white balance modules.

Sunshine white balance, cloudy white balance, halogen white balance, fluorescent white balance ... and so on ~

This kind of thing is the situation mode in white balance! What is white in the sun? What about the white under the fluorescent lamp?

So this is to input the color temperature at that time into the camera. In other words, let the camera know. What n is white at this time?

The effect will be more pleasing to the eye.

When there are blue and white clouds, use the white balance of the sun. The whole photo will be slightly blue. The blue of this day will be bluer.

The same original file; However, under different white balance settings, different effects will appear.

Set the white balance on cloudy days. The photo will appear reddish.

Then set the white balance in the case of black light. The photo will be slightly blue.

If the white balance is the same in sunny days, the effect will be different.

So there is no time to use n white balance.

So different color temperatures are used in different occasions. The result will be different.

Now most digital cameras have automatic white balance and custom white balance.

It's just that the automatic white balance function is a bit lame at present.

You can set your own white balance with white paper.

Use the reflected light of the field light source to make the camera a white reference.

First, switch the white balance to the custom column.

Press and hold the white balance shortcut key for 3 seconds. Started flashing. Fill the observation window with white paper. Focus manually and press the shutter.

If the sampling is successful, the LCD will display well. If it fails, it will display no Good. Just try a few more times.

The instructions attached to the digital camera are very detailed.

After the setting is completed, the digital camera will naturally take pictures according to your adjustment.

The photos taken with your own white balance will be closer to the original color.

But remember. You have to reset it to other scenes.

Professional digital cameras provide manual white balance adjustment buttons.

The user can directly press and hold the manual white balance button 1 ~ 2 seconds before the system prompts.

Use white paper to set the white balance, not paper, because paper reflects light.

A little more exquisite can be Kodak's white card or gray card.

Gray card white balance measurement

Generally, white paper is uneven, so the white balance of each correction is not necessarily the same.

And some paper is coated (snow copper paper). Too much reflection can easily lead to misjudgment of the camera.

Grey card is a kind of specially treated paper, which can balance astigmatism.

It can balance complex light into neutral gray color of 18%. Suitable for general photography and professional photography.

Or a professional color temperature meter.

Use a color temperature meter to measure the color temperature of the scene. Then the measured value is input into the digital camera to complete the setting of white balance.

However, color temperature meters are rare and the most expensive. It is quite complicated to use. Mainly used for professional photography.

Question 8: What do white balance, ISO, exposure value, scene and photometry mean in mobile phone photography? What is the role of each? 10 These are professional terms of photography, and you can't say a word or two clearly.

But I can tell you that color distortion is a problem of white balance, and it has nothing to do with ISO, exposure value, scene and photometry.

Question 9: What does the white balance of the camera mean? Simply put, tell the camera what white n is.