In the process of digital camera, many beginners will find the light of fluorescent lamps in the human appears to be white, but came out with a digital camera was a bit green. Similarly, if it is in the incandescent lamp, the shoot will be clear reddish color of the image.
Nikon EN-EL15 Battery. The reason why the human eye as they are white, because the human eye is modified. If the camera can capture images of color and the color the human eye can see exactly the same as just fine. However, the CCD sensor itself is not such a function, so it is necessary to signal to its output some amendments, this amendment is called white balance.
Therefore, the white balance control is through the image adjustment, so that in all light conditions the pictures capture the color and the human eye see color exactly the same scene. Short, no matter how light the white balance is still the "white" is defined as "white" of a function. Color is essentially the interpretation of light, in normal light, the white stuff looks like the light in the dark looks may not be white, as well as fluorescent "white" is also "non-white."
Nikon EN-EL15 Batte . To better understand white balance, color temperature we have to learn about the knowledge.
Color temperature is an important part of photography, but there are many amateur photographers do not know its true meaning. In the eyes of the general reader, color and temperature of the wind phase and the cattle are not two different things, and in photography, light is always defined according to their color temperature. Color temperature unit is Kelvin. And degrees Fahrenheit, Celsius, as Kelvin is the temperature of a unit of measurement. Color and the relationship between Kelvin temperature blackbody radiation originated in the body (heating it until it is light) at different temperatures show the color is the color temperature. When the black object began to glow when heated into a dark red, if it continues to heat will become yellow, then white, and finally becomes blue.
Nikon EN-EL5 Battery The color temperature phenomenon is very common in our daily life, I believe everyone is it too familiar. Cloudless blue sky the color temperature of about 10000 K, cloudy day of about 7000 ~ 9000 K, under direct sunlight sunny color
Nikon EN-EL3 Charger temperature of about 6000 K, fluorescent color temperature of about 4500 K, the color temperature of tungsten is about 2600 K, sunrise or sunset when the color temperature of about 2000 K, candlelight color temperature of about 1000 K.
Color temperature white balance for digital cameras in terms of the problem is, this is quite daunting for many aspects of photography enthusiasts. In a variety of lighting conditions, the target will produce the color change. In this regard, changes in the white object was the most obvious: in indoor tungsten light, white object will look with orange hue,
Nikon Coolpix 4300 Batteryin this light shooting out of the scene will be yellowish; but if it is in the blue sky The following will be with a blue tint. In this light shooting out of the scene will be blue. To minimize external light on the impact of the target color in different color temperature conditions can be taken to restore the original target color, you need color correction of digital camera to achieve the right color balance, which is called white balance adjustment.
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Color temperature describes the spectrum of light which is radiated from a "blackbody" with that surface temperature. A blackbody is an object which absorbs all incident light — neither reflecting it nor allowing it to pass through. A rough analogue of blackbody radiation in our day to day experience might be in heating a metal or stone: these are said to become "red hot" when they attain one temperature, and then "white hot" for even higher temperatures. Similarly,
Nikon Coolpix 5000 Battery blackbodies at different temperatures also have varying color temperatures of "white light." Despite its name, light which may appear white does not necessarily contain an even distribution of colors across the visible spectrum:
Relative intensity has been normalized for each temperature (in Kelvins).
Note how 5000 K produces roughly neutral light, whereas 3000 K and 9000 K produce light spectrums which shift to contain more orange and blue wavelengths, respectively. As the color temperature rises, the color distribution becomes cooler. This
Nikon Coolpix 5400 Battery may not seem intuitive, but results from the fact that shorter wavelengths contain light of higher energy.
Why is color temperature a useful description of light for photographers, if they never deal with true blackbodies? Fortunately, light sources such as daylight and tungsten bulbs closely mimic the distribution of light created by blackbodies, although others such as fluorescent and most commercial lighting depart from blackbodies significantly. Since photographers never use the term color temperature to refer to a true blackbody light source, the term is implied to be a "correlated color temperature" with a similarly colored blackbody. The following table is a rule-of-thumb guide
Nikon Coolpix 995 Battery to the correlated color temperature of some common light sources:
Color Temperature Light Source
1000-2000 K Candlelight
2500-3500 K Tungsten Bulb (household variety)
3000-4000 K Sunrise/Sunset (clear sky)
4000-5000 K Fluorescent Lamps
5000-5500 K Electronic Flash
5000-6500 K Daylight with Clear Sky (sun overhead)
6500-8000 K Moderately Overcast Sky
9000-10000 K Shade or Heavily Overcast Sky
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Since some light sources do not resemble blackbody radiators, white balance uses a second variable in addition to color temperature: the green-magenta shift. Adjusting the green-magenta shift is often unnecessary under ordinary daylight, however fluorescent
Nikon Coolpix 4800 Battery and other artificial lighting may require significant green-magenta adjustments to the WB.
Below is the common Setting for White Balance:
Auto White Balance
Custom
Kelvin
Tungsten
Fluorescent
Daylight
Flash
Cloudy
Shade
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Fortunately, most digital cameras contain a variety of preset white balances, so you do not have to deal with color temperature and green-magenta shift during the critical shot. Commonly used symbols for each of these are listed to the left.
The first three white balances allow for a range of color temperatures. Auto white balance is available in all digital cameras and uses a best guess algorithm within a limited range — usually between 3000/4000 K and 7000 K. Custom white balance allows you to take a picture of a known gray reference under the same lighting, and then set that as the white balance for future photos
Minolta DIMAGE A200 Battery . With "Kelvin" you can set the color temperature over a broad range.
The remaining six white balances are listed in order of increasing color temperature, however many compact cameras do not include a shade white balance. Some cameras also include a "Fluorescent H" setting, which is designed to work in newer daylight-calibrated fluorescents.
The description and symbol for the above white balances are just rough estimates for the actual lighting they work best under. In fact, cloudy could be used in place of daylight depending on the time of day, elevation, or degree of haziness. In general, if your image appears too cool on your LCD screen preview (regardless of the setting), you can quickly increase
Nikon Coolpix S1 Battery the color temperature by selecting a symbol further down on the list above. If the image is still too cool (or warm if going the other direction), you can resort to manually entering a temperature in the Kelvin setting.
If all else fails and the image still does not have the correct WB after inspecting it on a computer afterwards, you can adjust the color balance to remove additional color casts. Alternatively, one could click on a colorless reference (see section on neutral references) with the "set gray point" dropper while using the "levels" tool in Photoshop. Either of these methods should be avoided since they can severely reduce the bit depth of your image.
Now digital cameras have white balance sensor, usually located below the lens. White institutions will attempt to make white pure white. If the brightest part is yellow, it will strengthen
Nikon Coolpix S2 Battery the blue screen to reduce the yellow color, in order to achieve a more natural colors. Shoot digital camera as long as the right to restore the white objects white object, you can also restore the right lighting conditions, color and other objects.
Now adjust the white balance digital cameras typically have 4 to 5 modes, slightly different due to different manufacturers, but not very different. Canon digital cameras, are generally divided into automatic, daylight, cloudy, incandescent, fluorescent and other models. In the daytime mode, the digital camera's white balance function will enhance the image of the yellow, when you shoot outdoors on sunny days, you can set the white balance function during the day mode; if the indoor shooting, according to the light source for interior design , are generally two kinds of tungsten and fluorescent lights, white object in the fluorescent mode, a blue color. In the tungsten lamp mode,
Nikon D1 Battery the digital camera's white balance function will be to strengthen the image of the blue. If you mistakenly set the white balance in daylight mode, the screen colors become too yellow.
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